Abrégé

A circumferential sealing assembly for use between a lower-pressure oil side and a higher-pressure gas side is presented. The assembly includes a sealing ring interposed between either a rotatable runner or a sleeve and a housing within a turbine engine. Ducts communicate the hot gas into grooves to form a thin film between the ring and the runner or the sleeve. Embodiments include grooves on the runner and ducts through the runner; grooves on the ring and ducts through the runner; grooves on the ring and ducts through the ring; grooves on the runner and ducts through the ring; grooves on the sleeve and ducts through the sleeve; grooves on the ring and ducts through the sleeve; grooves on the ring and ducts through the ring adjacent to the sleeve; and grooves on the sleeve and ducts through the ring. Grooves and/or ducts may rotate with the component(s) thereon.

Classes IPC  ?

• F16J 15/34 - Joints d'étanchéité entre deux surfaces mobiles l'une par rapport à l'autre par bague glissante pressée contre la face plus ou moins radiale d'une des deux parties

Abrégé

A circumferential seal assembly (30) for use between a higher pressure side (36) and a lower pressure side (37) is presented. The seal assembly (30) includes a primary sealing ring (31), a second sealing ring (32), a third sealing ring (33), and an insert (34). The primary sealing ring (30) sealingly engages both a face sealing surface (46) along a housing (35) and a radial sealing surface (45) along a rotatable element (52). The primary sealing ring (31), the second sealing ring (32), and the third sealing ring (33) cooperate, in combination with the housing (34), the rotatable element (52), and/or the insert (32), both to define and to separate a first cavity (53) at the higher pressure side (36) and a second cavity (54) at the lower pressure side (37). In some embodiments, the second sealing ring (32) sealingly engages a face (106) of the primary sealing ring (31). In other embodiments, the second sealing ring (32) sealingly engages a circumferential surface of the primary sealing ring (31).

Classes IPC  ?

• F01D 11/00 - Prévention ou réduction des pertes internes du fluide énergétique, p. ex. entre étages
• F16J 15/24 - Joints d'étanchéité entre deux surfaces mobiles l'une par rapport à l'autre par presse-étoupes pour garnitures élastiques ou plastiques la garniture étant comprimée radialement ou tangentiellement
• F16J 15/44 - Garnitures discontinues

Abrégé

A circumferential seal assembly suitable for forming a thin film between a rotatable runner and a sealing ring is presented. The assembly includes an annular seal housing, a rotatable runner, an annular seal ring, and a plurality of groove structures. Each groove structure includes a groove and an optional feed groove. The groove includes at least two adjoining steps defined by base walls arranged to decrease depthwise. Two adjoining base walls are disposed about a base shoulder. Each base shoulder locally redirects a longitudinal flow to form an outward radial flow in the direction of the annular seal ring. The base walls are bounded by and intersect a pair of side walls. A side wall includes side shoulders which narrows the groove widthwise and locally redirects the longitudinal flow to form a lateral flow in the direction of the other side wall. Outward and lateral flows separately or in combination enhance stiffness of a thin-film layer between the annular seal ring and the rotatable runner.

Classes IPC  ?

• F16J 15/40 - Joints d'étanchéité entre deux surfaces mobiles l'une par rapport à l'autre par un fluide
• F16C 32/06 - Paliers non prévus ailleurs comprenant un élément mobile supporté par un coussinet de fluide engendré, au moins en grande partie, autrement que par la rotation de l'arbre, p. ex. paliers hydrostatiques à coussinet d'air
• F01D 11/04 - Prévention ou réduction des pertes internes du fluide énergétique, p. ex. entre étages par obturation non contact, p. ex. du type labyrinthe utilisant un fluide d'obturation, p. ex. de la vapeur
• F01D 25/22 - Systèmes de lubrification utilisant un fluide énergétique ou un autre fluide gazeux comme lubrifiant
• F16J 15/44 - Garnitures discontinues

Abrégé

A circumferential sealing assembly for use between a lower-pressure side with a lubricant oil therein and a higher-pressure side with a hot gas therein is presented. The assembly includes a sealing ring interposed between either a rotatable runner and a housing or a sleeve and a housing within a turbine engine. Ducts communicate the hot gas into grooves to form a thin film between the ring and the runner or the ring and the sleeve. First embodiments include grooves on the runner, ducts through the runner, and both grooves and ducts rotating with the runner. Second embodiments include grooves on the ring, ducts through the runner, and ducts rotating with the runner. Third embodiments include grooves on the ring and ducts through the ring adjacent to a runner. Fourth embodiments include grooves on the runner, ducts through the ring, and grooves rotating with the runner. Fifth embodiments include grooves on the sleeve, ducts through the sleeve, and both grooves and ducts rotating with the sleeve. Sixth embodiments include grooves on the ring, ducts through the sleeve, and ducts rotating with the sleeve. Seventh embodiments include grooves on the ring and ducts through the ring adjacent to a sleeve. Eighth embodiments include grooves on the sleeve, ducts through the ring, and grooves rotating with the sleeve.

Classes IPC  ?

• F16J 15/34 - Joints d'étanchéité entre deux surfaces mobiles l'une par rapport à l'autre par bague glissante pressée contre la face plus ou moins radiale d'une des deux parties

Abrégé

A circumferential sealing assembly for use between a lower-pressure side with a lubricant oil therein and a higher-pressure side with a hot gas therein is presented. The assembly includes a sealing ring interposed between either a rotatable runner and a housing or a sleeve and a housing within a turbine engine. Ducts communicate the hot gas into grooves to form a thin film between the ring and the runner or the ring and the sleeve. First embodiments include grooves on the runner, ducts through the runner, and both grooves and ducts rotating with the runner. Second embodiments include grooves on the ring, ducts through the runner, and ducts rotating with the runner. Third embodiments include grooves on the ring and ducts through the ring adjacent to a runner. Fourth embodiments include grooves on the runner, ducts through the ring, and grooves rotating with the runner. Fifth embodiments include grooves on the sleeve, ducts through the sleeve, and both grooves and ducts rotating with the sleeve. Sixth embodiments include grooves on the ring, ducts through the sleeve, and ducts rotating with the sleeve. Seventh embodiments include grooves on the ring and ducts through the ring adjacent to a sleeve. Eighth embodiments include grooves on the sleeve, ducts through the ring, and grooves rotating with the sleeve.

Classes IPC  ?

• F16J 15/34 - Joints d'étanchéité entre deux surfaces mobiles l'une par rapport à l'autre par bague glissante pressée contre la face plus ou moins radiale d'une des deux parties

Abrégé

A circumferential seal assembly suitable for forming a thin film between a rotatable runner and a sealing ring is presented. The assembly includes an annular seal housing, a rotatable runner, an annular seal ring, and a plurality of groove structures. Each groove structure includes a groove and an optional feed groove. The groove includes at least two adjoining steps defined by base walls arranged to decrease depthwise. Two adjoining base walls are disposed about a base shoulder. Each base shoulder locally redirects a longitudinal flow to form an outward radial flow in the direction of the annular seal ring. The base walls are bounded by and intersect a pair of side walls. A side wall includes side shoulders which narrows the groove widthwise and locally redirects the longitudinal flow to form a lateral flow in the direction of the other side wall. Outward and lateral flows separately or in combination enhance stiffness of a thin-film layer between the annular seal ring and the rotatable runner.

Classes IPC  ?

• F16J 15/40 - Joints d'étanchéité entre deux surfaces mobiles l'une par rapport à l'autre par un fluide
• F16C 32/06 - Paliers non prévus ailleurs comprenant un élément mobile supporté par un coussinet de fluide engendré, au moins en grande partie, autrement que par la rotation de l'arbre, p. ex. paliers hydrostatiques à coussinet d'air
• F01D 11/04 - Prévention ou réduction des pertes internes du fluide énergétique, p. ex. entre étages par obturation non contact, p. ex. du type labyrinthe utilisant un fluide d'obturation, p. ex. de la vapeur
• F01D 25/22 - Systèmes de lubrification utilisant un fluide énergétique ou un autre fluide gazeux comme lubrifiant
• F16J 15/44 - Garnitures discontinues

Abrégé

An interposable seal assembly (1) for use between a pair of shafts (8, 9) to separate a first side (11) and a second side (12) is presented. The assembly (1) includes a first ring (2), a second ring (3), an annular member (4), a sealing ring (5), and an annular pocket (16). The annular member (4) is radially disposed between and secured to the first ring (2) and the second ring (3). The sealing ring (5) is secured to and movable with the second ring (3). The annular pocket (16) is disposed between a pair of end rings (13). The first ring (2) is secured to one of the shafts (8 or 9). The end rings (13) are secured to another of the shafts (9 or 8) with the sealing ring (5) disposed between the end rings (13). Each end ring (13) has a sealing surface (22 or 23) within the annular pocket (16). The sealing ring (5) is biased toward one of the sealing surfaces (22 or 23) so as to form a face seal (37). The face seal (37) is disposed between a face (39) of the sealing ring (5) and the sealing surface (22 or 23). The annular member (4) adaptively maintains the face seal (37).

Classes IPC  ?

• F01D 11/00 - Prévention ou réduction des pertes internes du fluide énergétique, p. ex. entre étages
• F16J 15/34 - Joints d'étanchéité entre deux surfaces mobiles l'une par rapport à l'autre par bague glissante pressée contre la face plus ou moins radiale d'une des deux parties

Abrégé

TR) encountered by the primary seal ring.

Classes IPC  ?

• F02C 7/28 - Agencement des dispositifs d'étanchéité
• F16C 32/06 - Paliers non prévus ailleurs comprenant un élément mobile supporté par un coussinet de fluide engendré, au moins en grande partie, autrement que par la rotation de l'arbre, p. ex. paliers hydrostatiques à coussinet d'air
• F01D 11/04 - Prévention ou réduction des pertes internes du fluide énergétique, p. ex. entre étages par obturation non contact, p. ex. du type labyrinthe utilisant un fluide d'obturation, p. ex. de la vapeur
• F16J 15/00 - Joints d'étanchéité
• F16J 15/3244 - Joints d'étanchéité entre deux surfaces mobiles l'une par rapport à l'autre par joints élastiques, p. ex. joints toriques avec pompage hydrodynamique

Abrégé

A circumferential seal assembly for use between a higher pressure side and a lower pressure side is presented. The seal assembly includes a primary sealing ring, a second sealing ring, a third sealing ring, and an insert. The primary sealing ring sealingly engages both a face sealing surface along a housing and a radial sealing surface along a rotatable element. The primary sealing ring, the second sealing ring, and the third sealing ring cooperate, in combination with the housing, the rotatable element, and/or the insert, both to define and to separate a first cavity at the higher pressure side and a second cavity at the lower pressure side. In some embodiments, the second sealing ring sealingly engages a face of the primary sealing ring. In other embodiments, the second sealing ring sealingly engages a circumferential surface of the primary sealing ring.

Classes IPC  ?

• F01D 11/00 - Prévention ou réduction des pertes internes du fluide énergétique, p. ex. entre étages
• F16J 15/24 - Joints d'étanchéité entre deux surfaces mobiles l'une par rapport à l'autre par presse-étoupes pour garnitures élastiques ou plastiques la garniture étant comprimée radialement ou tangentiellement
• F16J 15/44 - Garnitures discontinues

Abrégé

A circumferential seal assembly for use between a higher pressure side and a lower pressure side is presented. The seal assembly includes a primary sealing ring, a second sealing ring, a third sealing ring, and an insert. The segmented primary sealing ring sealingly engages both a face sealing surface along a housing and a radial sealing surface along a rotatable element. The insert is disposed within and directly contacts the housing. The second sealing ring is adjacent to the primary sealing ring and sealingly engages both the primary sealing ring and the insert. The segmented third sealing ring contacts and sealingly engages the primary sealing ring opposite the housing. The insert, the second sealing ring, and the third sealing ring cooperate to form a first cavity adjacent to the second sealing ring and the third sealing ring. The primary sealing ring, the second sealing ring, the insert, and the housing cooperate to form a second cavity adjacent to the primary sealing ring. The insert and the second sealing ring separate the first cavity from the second cavity.

Classes IPC  ?

• F01D 11/00 - Prévention ou réduction des pertes internes du fluide énergétique, p. ex. entre étages
• F16J 15/24 - Joints d'étanchéité entre deux surfaces mobiles l'une par rapport à l'autre par presse-étoupes pour garnitures élastiques ou plastiques la garniture étant comprimée radialement ou tangentiellement
• F16J 15/44 - Garnitures discontinues

Abrégé

An intershaft seal assembly (20) for use between a rotatable outer structure (21) and an inner structure (22) within a turbine engine is presented. The assembly (20) includes a primary sealing ring (23), a translatable carrier (24), a secondary sealing ring(s) (32), a lower-pressure chamber (33), a higher-pressure chamber (34), a first channel(s) (35), and a second channel(s) (36). The primary ring (23) is disposed within and extends from a circumferential groove (27) about the carrier (24) so as to sealingly engage the rotatable outer structure (21). The primary ring (23) rotates within the groove (27) and with the rotatable outer structure (21). Each secondary ring (32) is interposed between the carrier (24) and the inner structure (22). The carrier (24) slidingly contacts the secondary ring(s) (32). The lower-pressure chamber (33) is generally defined by the carrier (24) and the inner structure (22) adjacent to a higher- pressure side (26). The higher-pressure chamber (34) is generally defined by the carrier (24) and the inner structure (22) adjacent to a lower-pressure side (25). Each first channel (35) traverses the carrier (24) so that a gas from the lower-pressure side (25) may enter the lower-pressure chamber (33). Each second channel (36) traverses the carrier (24) so that a gas from the higher-pressure side (26) may enter the higher- pressure chamber (34). The sum of the translation-resistant forces (FTTR) encountered by the carrier (24) is less than the translation-resistance force (FTR) encountered by the primary seal ring (23).

Classes IPC  ?

• F16J 15/44 - Garnitures discontinues
• F16J 15/16 - Joints d'étanchéité entre deux surfaces mobiles l'une par rapport à l'autre
• F16J 15/3244 - Joints d'étanchéité entre deux surfaces mobiles l'une par rapport à l'autre par joints élastiques, p. ex. joints toriques avec pompage hydrodynamique
• F02C 7/28 - Agencement des dispositifs d'étanchéité
• F01D 11/00 - Prévention ou réduction des pertes internes du fluide énergétique, p. ex. entre étages

Abrégé

A circumferential seal assembly (87) suitable for forming a thin film between a rotatable runner (15, 35, 67) and a sealing ring (3, 4, 23, 24) is presented. The assembly (87) includes an annular seal housing (2, 22), a rotatable runner (15, 35, 67), an annular seal ring (3, 4, 23, 24), and a plurality of groove structures (66). Each groove structure (66) includes a groove (69) and an optional feed groove (70). The groove (69) includes at least two adjoining steps (71) defined by base walls (72) arranged to decrease depthwise. Two adjoining base walls (72) are disposed about a base shoulder (73). Each base shoulder (73) locally redirects a longitudinal flow (80) to form an outward radial flow (78) in the direction of the annular seal ring (3, 4, 23,24). The base walls (72) are bounded by and intersect a pair of side walls (74). A side wall (74) includes at least one side shoulder (75) which narrows the groove (69) widthwise and locally redirects the longitudinal flow (80) to form a lateral flow (79) in the direction of the other side wall (74). Outward and lateral flows (78, 79) separately or in combination enhance stiffness of a thin-film layer (20) between the annular seal ring (3, 4, 23, 24) and the rotatable runner (15, 35, 67).

Classes IPC  ?

• F16C 32/06 - Paliers non prévus ailleurs comprenant un élément mobile supporté par un coussinet de fluide engendré, au moins en grande partie, autrement que par la rotation de l'arbre, p. ex. paliers hydrostatiques à coussinet d'air
• F01D 25/22 - Systèmes de lubrification utilisant un fluide énergétique ou un autre fluide gazeux comme lubrifiant
• F16J 15/40 - Joints d'étanchéité entre deux surfaces mobiles l'une par rapport à l'autre par un fluide
• F01D 11/04 - Prévention ou réduction des pertes internes du fluide énergétique, p. ex. entre étages par obturation non contact, p. ex. du type labyrinthe utilisant un fluide d'obturation, p. ex. de la vapeur
• F16J 15/44 - Garnitures discontinues

Abrégé

A slurry seal assembly for use about a rotatable shaft between a process side and an atmosphere side is presented. The slurry seal assembly includes a sleeve, a rotatable seal ring, a stationary seal ring, a floating bushing seal assembly, and a plurality of slots. The sleeve is disposed about and rotatable with the shaft. The rotatable seal ring contacts and is rotatable with the sleeve. The stationary seal ring is arranged to form a sealing interface with the rotatable seal ring. The floating bushing seal assembly is disposed about the sleeve so that an inner annular surface along the floating bushing seal assembly is separated from an outer annular surface along the sleeve by a gap. The slots are disposed along the sleeve within the process side adjacent to the floating bushing seal assembly. The slurry seal assembly is applicable to devices whereby a fluid is movable between an inlet and an outlet.

Classes IPC  ?

• F16J 15/00 - Joints d'étanchéité
• F04D 7/04 - Pompes adaptées à la manipulation de liquides particuliers, p. ex. par choix de matériaux spéciaux pour les pompes ou pièces de pompe du type centrifuge les fluides étant visqueux ou non homogènes
• F04D 29/12 - Joints d'étanchéité pour arbre utilisant des bagues
• F16J 15/34 - Joints d'étanchéité entre deux surfaces mobiles l'une par rapport à l'autre par bague glissante pressée contre la face plus ou moins radiale d'une des deux parties
• F04D 29/10 - Joints d'étanchéité pour arbre
• F04D 29/42 - Carters d'enveloppeTubulures pour le fluide énergétique pour pompes radiales ou hélicocentrifuges

Abrégé

A circumferential seal assembly capable of separating a gas into two separate flow paths before communication between a rotatable runner and a pair of seal rings is presented. The seal assembly includes an annular seal housing, a pair of annular seal rings, a rotatable runner, and a plurality of groove structures. The seal housing is interposed between a pair of compartments. The seal rings are separately disposed within the seal housing and separately disposed around the rotatable runner. The groove structures are disposed along an outer annular surface of the rotatable runner. A gas is communicable onto the groove structures. Each groove structure includes at least two hydrodynamic grooves that separate and communicate the gas onto the seal rings. Each groove includes steps whereby the depth of at least one adjoining step decreases in the direction opposite to rotation with or without the depth of another adjoining steps increasing in the direction opposite to rotation.

Classes IPC  ?

• F16J 15/40 - Joints d'étanchéité entre deux surfaces mobiles l'une par rapport à l'autre par un fluide
• F16C 32/06 - Paliers non prévus ailleurs comprenant un élément mobile supporté par un coussinet de fluide engendré, au moins en grande partie, autrement que par la rotation de l'arbre, p. ex. paliers hydrostatiques à coussinet d'air
• F16J 15/44 - Garnitures discontinues
• F01D 11/04 - Prévention ou réduction des pertes internes du fluide énergétique, p. ex. entre étages par obturation non contact, p. ex. du type labyrinthe utilisant un fluide d'obturation, p. ex. de la vapeur
• F01D 25/22 - Systèmes de lubrification utilisant un fluide énergétique ou un autre fluide gazeux comme lubrifiant

Abrégé

A circumferential seal assembly suitable for forming a thin film between a rotatable runner and a sealing ring is presented. The assembly includes an annular seal housing, a rotatable runner, an annular seal ring, and a plurality of groove structures. Each groove structure includes a groove and an optional feed groove. The groove includes at least two adjoining steps defined by base walls arranged to decrease depthwise. Two adjoining base walls are disposed about a base shoulder. Each base shoulder locally redirects a longitudinal flow to form an outward radial flow in the direction of the annular seal ring. The base walls are bounded by and intersect a pair of side walls. A side wall includes at least one side shoulder which narrows the groove widthwise and locally redirects the longitudinal flow to form a lateral flow in the direction of the other side wall. Outward and lateral flows separately or in combination enhance stiffness of a thin-film layer between the annular seal ring and the rotatable runner.

Classes IPC  ?

• F16J 15/44 - Garnitures discontinues
• F16C 32/06 - Paliers non prévus ailleurs comprenant un élément mobile supporté par un coussinet de fluide engendré, au moins en grande partie, autrement que par la rotation de l'arbre, p. ex. paliers hydrostatiques à coussinet d'air
• F01D 25/22 - Systèmes de lubrification utilisant un fluide énergétique ou un autre fluide gazeux comme lubrifiant
• F16J 15/40 - Joints d'étanchéité entre deux surfaces mobiles l'une par rapport à l'autre par un fluide
• F01D 11/04 - Prévention ou réduction des pertes internes du fluide énergétique, p. ex. entre étages par obturation non contact, p. ex. du type labyrinthe utilisant un fluide d'obturation, p. ex. de la vapeur

Abrégé

A circumferential seal assembly for use between a higher pressure side and a lower pressure side is presented. The seal assembly includes a primary sealing ring, a second sealing ring, a third sealing ring, and an insert. The segmented primary sealing ring sealingly engages both a face sealing surface along a housing and a radial sealing surface along a rotatable element. The insert is disposed within and directly contacts the housing. The second sealing ring is adjacent to the primary sealing ring and sealingly engages both the primary sealing ring and the insert. The segmented third sealing ring contacts and sealingly engages the primary sealing ring opposite the housing. The insert, the second sealing ring, and the third sealing ring cooperate to form a first cavity adjacent to the second sealing ring and the third sealing ring. The primary sealing ring, the second sealing ring, the insert, and the housing cooperate to form a second cavity adjacent to the primary sealing ring. The insert and the second sealing ring separate the first cavity from the second cavity.

Classes IPC  ?

• F01D 11/00 - Prévention ou réduction des pertes internes du fluide énergétique, p. ex. entre étages
• F16J 15/24 - Joints d'étanchéité entre deux surfaces mobiles l'une par rapport à l'autre par presse-étoupes pour garnitures élastiques ou plastiques la garniture étant comprimée radialement ou tangentiellement
• F16J 15/44 - Garnitures discontinues

Abrégé

A circumferential seal assembly (1 or 21) capable of dividing a gas into separate flow paths before communication between a rotatable runner (15, 35, or 67) and a pair of seal rings (3, 4 or 23, 24) is presented. The assembly (1 or 21) includes an annular seal housing (2 or 22), a rotatable runner (15, 35, or 67), a pair of annular seal rings (3, 4 or 23, 24), and a plurality of groove structures (66). Each groove structure (66) separates a source flow (83) communicated into a feed groove (70) so that a portion enters at least two grooves (69) to form a longitudinal flow (80) therein. Each groove (69) includes at least two adjoining steps (71) defined by base walls (72). The base walls (72) are arranged along the groove (69) to decrease depth wise opposite to rotation of the rotatable runner (15, 35, or 67). Two adjoining base walls (72) are disposed about a base shoulder (73). Each base shoulder (73) locally redirects the longitudinal flow (80) to form an outward radial flow (78) in the direction of one annular seal ring (3, 4 or 23, 24). The base walls (72) are bounded by and intersect a pair of side walls (74). Each side wall (74) includes at least one side shoulder (75) which narrows the groove (69) width wise and locally redirects the longitudinal flow (80) away from the side wall (74) to form a lateral flow (79) in the direction of the other side wall (74). Each reduction to the volume of the gas at the downstream end of each groove structure (66) increases pressure and enhances the stiffness of a thin-film layer (20) between each annular seal ring (3, 4 or 23, 24) and the rotatable runner (15, 35, or 67).

Classes IPC  ?

• F16C 32/06 - Paliers non prévus ailleurs comprenant un élément mobile supporté par un coussinet de fluide engendré, au moins en grande partie, autrement que par la rotation de l'arbre, p. ex. paliers hydrostatiques à coussinet d'air
• F16J 15/44 - Garnitures discontinues
• F16J 15/40 - Joints d'étanchéité entre deux surfaces mobiles l'une par rapport à l'autre par un fluide
• F01D 25/22 - Systèmes de lubrification utilisant un fluide énergétique ou un autre fluide gazeux comme lubrifiant
• F01D 11/04 - Prévention ou réduction des pertes internes du fluide énergétique, p. ex. entre étages par obturation non contact, p. ex. du type labyrinthe utilisant un fluide d'obturation, p. ex. de la vapeur

Abrégé

An intershaft seal assembly (2) for maintaining separation between a piston ring (3) and a pair of mating rings (4, 5) is presented. The assembly includes a piston ring (3) interposed between forward and aft mating rings (4, 5) and a plurality of hydrodynamic grooves (18) disposed along a sealing face (11, 12) of each mating ring (4, 5). Each hydrodynamic groove (18) further includes at least two adjoining steps (23) wherein each step (23) is defined by a base wall (24) arranged to decrease depthwise in the direction opposite to rotation of an inner shaft (8). Two adjoining base walls (24) define a base shoulder (25) which locally redirects potion of a longitudinal flow (32) within the groove to form an outward flow (30) in the direction of the piston ring (3). Base walls (24) are bounded by and intersect a pair of side walls (26) with at least one side shoulder (27) thereon which narrows the groove (18) widthwise and locally redirects portion of the longitudinal flow (32) to form a lateral flow (31) from one side wall (26) toward another side wall (26). Outward and lateral flows (30, 31) cooperate, with or without the longitudinal flow (32), to increase fluid pressure and maintain separation between the piston ring (3) and the mating rings (4, 5)·

Classes IPC  ?

• F16C 32/06 - Paliers non prévus ailleurs comprenant un élément mobile supporté par un coussinet de fluide engendré, au moins en grande partie, autrement que par la rotation de l'arbre, p. ex. paliers hydrostatiques à coussinet d'air
• F16J 15/44 - Garnitures discontinues
• F16J 15/40 - Joints d'étanchéité entre deux surfaces mobiles l'une par rapport à l'autre par un fluide
• F01D 25/22 - Systèmes de lubrification utilisant un fluide énergétique ou un autre fluide gazeux comme lubrifiant
• F01D 11/04 - Prévention ou réduction des pertes internes du fluide énergétique, p. ex. entre étages par obturation non contact, p. ex. du type labyrinthe utilisant un fluide d'obturation, p. ex. de la vapeur

Abrégé

A slurry seal assembly for use about a rotatable shaft between a process side and an atmosphere side is presented. The slurry seal assembly includes a sleeve, a rotatable seal ring, a stationary seal ring, a floating bushing seal assembly, and a plurality of slots. The sleeve is disposed about and rotatable with the shaft. The rotatable seal ring contacts and is rotatable with the sleeve. The stationary seal ring is arranged to form a sealing interface with the rotatable seal ring. The floating bushing seal assembly is disposed about the sleeve so that an inner annular surface along the floating bushing seal assembly is separated from an outer annular surface along the sleeve by a gap. The slots are disposed along the sleeve within the process side adjacent to the floating bushing seal assembly. The slurry seal assembly is applicable to devices whereby a fluid is movable between an inlet and an outlet.

Classes IPC  ?

• F16J 15/00 - Joints d'étanchéité
• F04D 7/04 - Pompes adaptées à la manipulation de liquides particuliers, p. ex. par choix de matériaux spéciaux pour les pompes ou pièces de pompe du type centrifuge les fluides étant visqueux ou non homogènes
• F04D 29/12 - Joints d'étanchéité pour arbre utilisant des bagues
• F16J 15/34 - Joints d'étanchéité entre deux surfaces mobiles l'une par rapport à l'autre par bague glissante pressée contre la face plus ou moins radiale d'une des deux parties
• F04D 29/10 - Joints d'étanchéité pour arbre
• F04D 29/42 - Carters d'enveloppeTubulures pour le fluide énergétique pour pompes radiales ou hélicocentrifuges

Abrégé

An intershaft seal assembly for maintaining separation between a piston ring and a pair of mating rings is presented. The assembly includes a piston ring interposed between forward and aft mating rings and a plurality of hydrodynamic grooves disposed along a sealing face of each mating ring. Each hydrodynamic groove further includes at least two adjoining steps wherein each step is defined by a base wall arranged to decrease depthwise in the direction opposite to rotation of an inner shaft. Two adjoining base walls define a base shoulder which locally redirects potion of a longitudinal flow within the groove to form an outward flow in the direction of the piston ring. Base walls are bounded by and intersect a pair of side walls with at least one side shoulder thereon which narrows the groove widthwise and locally redirects portion of the longitudinal flow to form a lateral flow from one side wall toward another side wall. Outward and lateral flows cooperate, with or without the longitudinal flow, to increase fluid pressure and maintain separation between the piston ring and the mating rings.

Classes IPC  ?

• F16C 32/06 - Paliers non prévus ailleurs comprenant un élément mobile supporté par un coussinet de fluide engendré, au moins en grande partie, autrement que par la rotation de l'arbre, p. ex. paliers hydrostatiques à coussinet d'air
• F01D 11/04 - Prévention ou réduction des pertes internes du fluide énergétique, p. ex. entre étages par obturation non contact, p. ex. du type labyrinthe utilisant un fluide d'obturation, p. ex. de la vapeur
• F01D 25/22 - Systèmes de lubrification utilisant un fluide énergétique ou un autre fluide gazeux comme lubrifiant
• F16J 15/44 - Garnitures discontinues
• F16J 15/40 - Joints d'étanchéité entre deux surfaces mobiles l'une par rapport à l'autre par un fluide

Abrégé

A circumferential seal assembly capable of dividing a gas into separate flow paths before communication between a rotatable runner and a pair of seal rings is presented. The assembly includes an annular seal housing, a rotatable runner, a pair of annular seal rings, and a plurality of groove structures. Each groove structure separates a source flow communicated into a feed groove so that a portion enters at least two grooves to form a longitudinal flow therein. Each groove includes at least two adjoining steps defined by base walls. The base walls are arranged along the groove to decrease depthwise opposite to rotation of the rotatable runner. Two adjoining base walls are disposed about a base shoulder. Each base shoulder locally redirects the longitudinal flow to form an outward radial flow in the direction of one annular seal ring. The base walls are bounded by and intersect a pair of side walls. Each side wall includes at least one side shoulder which narrows the groove widthwise and locally redirects the longitudinal flow away from the side wall to form a lateral flow in the direction of the other side wall. Each reduction to the volume of the gas at the downstream end of each groove structure increases pressure and enhances the stiffness of a thin-film layer between each annular seal ring and the rotatable runner.

Classes IPC  ?

• F16J 15/34 - Joints d'étanchéité entre deux surfaces mobiles l'une par rapport à l'autre par bague glissante pressée contre la face plus ou moins radiale d'une des deux parties
• F16C 32/06 - Paliers non prévus ailleurs comprenant un élément mobile supporté par un coussinet de fluide engendré, au moins en grande partie, autrement que par la rotation de l'arbre, p. ex. paliers hydrostatiques à coussinet d'air
• F01D 11/04 - Prévention ou réduction des pertes internes du fluide énergétique, p. ex. entre étages par obturation non contact, p. ex. du type labyrinthe utilisant un fluide d'obturation, p. ex. de la vapeur
• F01D 25/22 - Systèmes de lubrification utilisant un fluide énergétique ou un autre fluide gazeux comme lubrifiant
• F16J 15/44 - Garnitures discontinues
• F16J 15/40 - Joints d'étanchéité entre deux surfaces mobiles l'une par rapport à l'autre par un fluide

Abrégé

A circumferential seal assembly (30) for use between a higher pressure side (36) and a lower pressure side (37) is presented. The seal assembly (30) includes a primary sealing ring (31), a second sealing ring (32), a third sealing ring (33), and an insert (34). The segmented primary sealing ring (31) sealingly engages both a face sealing surface (46) along a housing (35) and a radial sealing surface (45) along a rotatable element (52). The insert (34) is disposed within and directly contacts the housing (35). The second sealing ring (32) is adjacent to the primary sealing ring (31) and sealingly engages both the primary sealing ring (31) and the insert (34). The segmented third sealing ring (33) contacts and sealingly engages the primary sealing ring (31) opposite the housing (35). The insert (34), the second sealing ring (32), and the third sealing ring (33) cooperate to form a first cavity (53) adjacent to the second sealing ring (32) and the third sealing ring (33). The primary sealing ring (31), the second sealing ring (32), the insert (34), and the housing (35) cooperate to form a second cavity (54) adjacent to the primary sealing ring (31). The insert (34) and the second sealing ring (32) separate the first cavity (53) from the second cavity (54).

Classes IPC  ?

• F01D 11/00 - Prévention ou réduction des pertes internes du fluide énergétique, p. ex. entre étages
• F16J 15/16 - Joints d'étanchéité entre deux surfaces mobiles l'une par rapport à l'autre

Abrégé

A circumferential seal assembly capable of separating a gas into two separate flow paths before communication between a rotatable runner and a pair of seal rings is presented. The seal assembly includes an annular seal housing, a pair of annular seal rings, a rotatable runner, and a plurality of groove structures. The seal housing is interposed between a pair of compartments. The seal rings are separately disposed within the seal housing and separately disposed around the rotatable runner. The groove structures are disposed along an outer annular surface of the rotatable runner. A gas is communicable onto the groove structures. Each groove structure includes at least two hydrodynamic grooves that separate and communicate the gas onto the seal rings. Each groove includes steps whereby the depth of at least one adjoining step decreases in the direction opposite to rotation with or without the depth of another adjoining steps increasing in the direction opposite to rotation. Each groove is also tapered widthwise.

Classes IPC  ?

• F16J 15/34 - Joints d'étanchéité entre deux surfaces mobiles l'une par rapport à l'autre par bague glissante pressée contre la face plus ou moins radiale d'une des deux parties
• F16C 32/06 - Paliers non prévus ailleurs comprenant un élément mobile supporté par un coussinet de fluide engendré, au moins en grande partie, autrement que par la rotation de l'arbre, p. ex. paliers hydrostatiques à coussinet d'air
• F16J 15/44 - Garnitures discontinues
• F01D 11/04 - Prévention ou réduction des pertes internes du fluide énergétique, p. ex. entre étages par obturation non contact, p. ex. du type labyrinthe utilisant un fluide d'obturation, p. ex. de la vapeur
• F16J 15/40 - Joints d'étanchéité entre deux surfaces mobiles l'une par rapport à l'autre par un fluide
• F01D 25/22 - Systèmes de lubrification utilisant un fluide énergétique ou un autre fluide gazeux comme lubrifiant

Abrégé

An intershaft seal assembly for use between an inner shaft and an outer shaft within a turbine engine is presented. The seal assembly includes a sealing ring, centrifugal retaining plates, and end rings. The sealing ring further includes a plurality of asymmetric ring segments whereby each asymmetric ring segment further includes a vertical flange and horizontal flanges extending from the vertical flange in a non-symmetric arrangement. At least one slot is disposed along each horizontal flange. The sealing ring is interposed between the centrifugal retaining plates. Each centrifugal retaining plate includes a plurality of tabs extending therefrom. Each tab is engaged by one slot. The sealing ring and the centrifugal retaining plates are interposed between the end rings. Each centrifugal retaining plate is directly interposed between one horizontal flange and one end ring. The vertical flange extends from between the end rings in the direction of the outer shaft. A non-contact seal is formed between an outer sealing surface along the vertical flange and an inner sealing surface along the outer shaft.

Classes IPC  ?

• F16J 15/44 - Garnitures discontinues
• F01D 11/00 - Prévention ou réduction des pertes internes du fluide énergétique, p. ex. entre étages
• F01D 25/16 - Aménagement des paliersSupport ou montage des paliers dans les stators

Abrégé

An intershaft seal assembly for use between an inner shaft and an outer shaft rotatable within a turbine engine is presented. The seal assembly includes a sealing ring, an inner ring, and a pair of end rings. The sealing ring further includes a plurality of asymmetric ring segments whereby each asymmetric ring segment further includes a vertical flange and a pair of horizontal flanges extending from the vertical flange in a non-symmetric arrangement. The non-symmetric seal geometry provides an axial force balance thereby reducing wear and increasing seal life. The sealing ring is disposed about the inner ring. The inner ring includes a plurality of ridges that engage the asymmetric ring segments so as to prevent rotation of the asymmetric ring segments with respect to the inner shaft. The end rings are disposed about the sealing ring and the inner ring. The horizontal flanges separately contact the end rings so that the vertical flange extends from and between the end rings in the direction of the outer shaft. A non-contact seal is formed between an outer sealing surface along the vertical flange and an inner sealing surface along the outer shaft.

Classes IPC  ?

• F01D 11/00 - Prévention ou réduction des pertes internes du fluide énergétique, p. ex. entre étages
• F16J 15/44 - Garnitures discontinues

Abrégé

A slurry seal assembly (20) for use about a rotatable shaft (21) between a process side (54) and an atmosphere side (55) is presented. The slurry seal assembly (20) includes a sleeve (22), a rotatable seal ring (23), a stationary seal ring (24), a floating bushing seal assembly (50), and a plurality of slots (52). The sleeve (22) is disposed about and rotatable with the shaft (21). The rotatable seal ring (23) contacts and is rotatable with the sleeve (22). The stationary seal ring (24) is arranged to form a sealing interface (25) with the rotatable seal ring (23). The floating bushing seal assembly (50) is disposed about the sleeve (22) so that an inner annular surface (66) along the floating bushing seal assembly (50) is separated from an outer annular surface (67) along the sleeve (22) by a gap (65). The slots (52) are disposed along the sleeve (22) within the process side (54) adjacent to the floating bushing seal assembly (50). The slurry seal assembly (20) is applicable to devices whereby a fluid is movable between an inlet and an outlet.

Classes IPC  ?

• F04D 29/10 - Joints d'étanchéité pour arbre
• F04D 7/04 - Pompes adaptées à la manipulation de liquides particuliers, p. ex. par choix de matériaux spéciaux pour les pompes ou pièces de pompe du type centrifuge les fluides étant visqueux ou non homogènes
• F16J 15/16 - Joints d'étanchéité entre deux surfaces mobiles l'une par rapport à l'autre

Abrégé

A circumferential seal assembly (1 or 21) capable of separating a gas into two separate flow paths before communication between a rotatable runner (15 or 35) and a pair of seal rings (3, 4 or 23, 24) is presented. The seal assembly (1 or 21) includes an annular seal housing (2 or 22), a pair of annular seal rings (3, 4 or 23, 24), a rotatable runner (15 or 25), and a plurality of groove structures (17, 37, 41 or 55). The seal housing (2 or 22) is interposed between a pair of compartments (5, 6 or 58, 59). The seal rings (3, 4 or 23, 24) are separately disposed within the seal housing (2 or 22) and separately disposed around the rotatable runner (15 or 35). The groove structures (17, 37, 41 or 55) are disposed along an outer annular surface (16 or 36) of the rotatable runner (15 or 35). A gas is communicable onto the groove structures (17, 37, 41 or 55). Each groove structure (17, 37, 41 or 55) includes at least two hydrodynamic grooves (19, 38, 43, or 49) that separate and communicate the gas onto the seal rings (3, 4 or 23, 24). Each groove (19, 38, 43, or 49) includes steps (62) whereby the depth (h) of at least one adjoining step (62) decreases in the direction opposite to rotation with or without the depth (h) of another adjoining steps (62) increasing in the direction opposite to rotation.

Classes IPC  ?

• F16C 32/06 - Paliers non prévus ailleurs comprenant un élément mobile supporté par un coussinet de fluide engendré, au moins en grande partie, autrement que par la rotation de l'arbre, p. ex. paliers hydrostatiques à coussinet d'air

Abrégé

An intershaft seal assembly (30) for use between an inner shaft (32) and an outer shaft (31) rotatable within a turbine engine is presented. The seal assembly (30) includes a sealing ring (33), an inner ring (39), and a pair of end rings (37, 38). The sealing ring (33) further includes a plurality of asymmetric ring segments (34) whereby each asymmetric ring segment (34) further includes a vertical flange (46) and a pair of horizontal flanges (47) extending from the vertical flange (46) in a non-symmetric arrangement. The non- symmetric seal geometry provides an axial force balance thereby reducing wear and increasing seal life. The sealing ring (33) is disposed about the inner ring (39). The inner ring (39) includes a plurality of ridges (43) that engage the asymmetric ring segments (34) so as to prevent rotation of the asymmetric ring segments (34) with respect to the inner shaft (32). The end rings (37, 38) are disposed about the sealing ring (33) and the inner ring (39). The horizontal flanges (47) separately contact the end rings (37, 38) so that the vertical flange (46) extends from and between the end rings (37, 38) in the direction of the outer shaft (31). A non-contact seal is formed between an outer sealing surface (62) along the vertical flange (46) and an inner sealing surface (63) along the outer shaft (31).

Classes IPC  ?

• F01D 11/00 - Prévention ou réduction des pertes internes du fluide énergétique, p. ex. entre étages
• F01D 25/16 - Aménagement des paliersSupport ou montage des paliers dans les stators
• F16J 15/44 - Garnitures discontinues

Abrégé

An intershaft seal assembly (30) for use between an inner shaft (32) and an outer shaft (31) within a turbine engine is presented. The seal assembly (30) includes a sealing ring (33), centrifugal retaining plates (102), and end rings (37, 38). The sealing ring (33) further includes a plurality of asymmetric ring segments (34) whereby each asymmetric ring segment (34) further includes a vertical flange (46) and horizontal flanges (47) extending from the vertical flange (46) in a non-symmetric arrangement. At least one slot (104) is disposed along each horizontal flange (47). The sealing ring (33) is interposed between the centrifugal retaining plates (102). Each centrifugal retaining plate (102) includes a plurality of tabs (103) extending therefrom. Each tab (103) is engaged by one slot (104). The sealing ring (33) and the centrifugal retaining plates (102) are interposed between the end rings (37, 38). Each centrifugal retaining plate (102) is directly interposed between one horizontal flange (47) and one end ring (37, 38). The vertical flange (46) extends from between the end rings (37, 38) in the direction of the outer shaft (31). A non-contact seal is formed between an outer sealing surface (62) along the vertical flange (46) and an inner sealing surface (63) along the outer shaft (31).

Classes IPC  ?

• F01D 11/00 - Prévention ou réduction des pertes internes du fluide énergétique, p. ex. entre étages
• F01D 25/16 - Aménagement des paliersSupport ou montage des paliers dans les stators
• F16J 15/44 - Garnitures discontinues

Abrégé

A circumferential seal assembly capable of separating a gas into two separate flow paths before communication between a rotatable runner and a pair of seal rings is presented. The seal assembly includes an annular seal housing, a pair of annular seal rings, a rotatable runner, and a plurality of groove structures. The seal housing is interposed between a pair of compartments. The seal rings are separately disposed within the seal housing and separately disposed around the rotatable runner. The groove structures are disposed along an outer annular surface of the rotatable runner. A gas is communicable onto the groove structures. Each groove structure includes at least two hydrodynamic grooves that separate and communicate the gas onto the seal rings. Each groove includes steps whereby the depth of at least one adjoining step decreases in the direction opposite to rotation with or without the depth of another adjoining steps increasing in the direction opposite to rotation.

Classes IPC  ?

• F16J 15/40 - Joints d'étanchéité entre deux surfaces mobiles l'une par rapport à l'autre par un fluide
• F16C 32/06 - Paliers non prévus ailleurs comprenant un élément mobile supporté par un coussinet de fluide engendré, au moins en grande partie, autrement que par la rotation de l'arbre, p. ex. paliers hydrostatiques à coussinet d'air
• F16J 15/44 - Garnitures discontinues
• F01D 11/04 - Prévention ou réduction des pertes internes du fluide énergétique, p. ex. entre étages par obturation non contact, p. ex. du type labyrinthe utilisant un fluide d'obturation, p. ex. de la vapeur
• F01D 25/22 - Systèmes de lubrification utilisant un fluide énergétique ou un autre fluide gazeux comme lubrifiant

Abrégé

The disclosure describes a windback device for a circumferential seal within a turbine engine. The windback device includes an annular collar at one end of an annular fluid seal housing, at least one inclined thread, and a plurality of inclined baffles separately disposed along an outer circumferential surface of a rotatable runner. The housing is adapted at another end for an annular seal. The collar has an opening therethrough sized to receive the runner without contact. The annular seal surrounds and sealingly engages the runner. The threads extend from an inner face of the collar toward the runner. The baffles are separately recessed in or raised above the outer circumferential surface of the runner. The baffles are interposed between the runner and threads. Each baffle is separated from the threads via a radial clearance. Threads and baffles direct lubricant away from the annular seal.

Classes IPC  ?

• F16J 15/00 - Joints d'étanchéité
• F16J 15/447 - Garnitures à labyrinthe
• F16J 15/40 - Joints d'étanchéité entre deux surfaces mobiles l'une par rapport à l'autre par un fluide
• F16J 15/44 - Garnitures discontinues
• F16J 15/16 - Joints d'étanchéité entre deux surfaces mobiles l'une par rapport à l'autre
• F01D 11/02 - Prévention ou réduction des pertes internes du fluide énergétique, p. ex. entre étages par obturation non contact, p. ex. du type labyrinthe
• F01D 11/00 - Prévention ou réduction des pertes internes du fluide énergétique, p. ex. entre étages
• F02C 7/28 - Agencement des dispositifs d'étanchéité

Abrégé

A circumferential seal assembly capable of separating a gas into two separate flow paths before communication onto a pair of seal rings is presented. The seal assembly includes an annular seal housing, a pair of annular seal rings, a rotatable runner, and a plurality of groove structures. The seal housing is interposed between a pair of low pressure compartments. The seal rings are separately disposed within the seal housing and separately disposed around the rotatable runner. The groove structures are disposed along an outer circumferential surface of the rotatable runner. The gas is communicable onto the groove structures. Each groove structure bifurcates the gas before communication onto the seal rings. Flow within each groove structure may be further separable before the gas is communicated onto the seal rings. The gas forms a thin-film layer between the rotatable runner and each seal ring.

Classes IPC  ?

• F16C 32/06 - Paliers non prévus ailleurs comprenant un élément mobile supporté par un coussinet de fluide engendré, au moins en grande partie, autrement que par la rotation de l'arbre, p. ex. paliers hydrostatiques à coussinet d'air
• F01D 11/04 - Prévention ou réduction des pertes internes du fluide énergétique, p. ex. entre étages par obturation non contact, p. ex. du type labyrinthe utilisant un fluide d'obturation, p. ex. de la vapeur
• F16J 15/40 - Joints d'étanchéité entre deux surfaces mobiles l'une par rapport à l'autre par un fluide
• F01D 25/22 - Systèmes de lubrification utilisant un fluide énergétique ou un autre fluide gazeux comme lubrifiant
• F16J 15/44 - Garnitures discontinues

Produits et services

Seals and sealing assemblies comprised of seals and structural parts for limiting fluid leakage between reciprocating or rotating components within machinery. Repair, maintenance, and refurbishment for others of seals and sealing assemblies comprised of seals and structural parts for limiting fluid leakage between reciprocating or rotating components within machinery. Manufacture for others of seals and sealing assemblies comprised of seals and structural parts for limiting fluid leakage between reciprocating or rotating components within machinery. Design, development, and testing for others of seals and sealing assemblies comprised of seals and structural parts for limiting fluid leakage between reciprocating or rotating components within machinery.

Produits et services

Seals and sealing assemblies comprised of seals and structural parts for limiting fluid leakage between reciprocating or rotating components within machinery. Repair, maintenance, and refurbishment for others of seals and sealing assemblies comprised of seals and structural parts for limiting fluid leakage between reciprocating or rotating components within machinery. Manufacture for others of seals and sealing assemblies comprised of seals and structural parts for limiting fluid leakage between reciprocating or rotating components within machinery. Design, development, and testing for others of seals and sealing assemblies comprised of seals and structural parts for limiting fluid leakage between reciprocating or rotating components within machinery.

Abrégé

A circumferential seal assembly (1) capable of separating a gas into two separate flow paths before communication onto a pair of seal rings (3, 4) is presented. The seal assembly (1) includes an annular seal housing (2), a pair of annular seal rings (3, 4), a rotatable runner (15), and a plurality of groove structures (17). The seal housing (2) is interposed between a pair of low pressure compartments (5, 6). The seal rings (3, 4) are separately disposed within the seal housing (2) and separately disposed around the rotatable runner (15). The groove structures (17) are disposed along an outer circumferential surface (16) of the rotatable runner (15). The gas is communicable onto the groove structures (17). Each groove structure (17) bifurcates the gas before communication onto the seal rings (3, 4). Flow within each groove structure (17) may be further separable before the gas is communicated onto the seal rings (3, 4). The gas forms a thin-film layer (20) between the rotatable runner (15) and each seal ring (3, 4).

Classes IPC  ?

• F02C 7/28 - Agencement des dispositifs d'étanchéité
• F01D 11/02 - Prévention ou réduction des pertes internes du fluide énergétique, p. ex. entre étages par obturation non contact, p. ex. du type labyrinthe
• F16J 15/16 - Joints d'étanchéité entre deux surfaces mobiles l'une par rapport à l'autre
• F16J 15/44 - Garnitures discontinues

Abrégé

The disclosure describes a circumferential seal (46) applicable to turbine engines. The circumferential seal (46) includes a ceramic runner (52), an annular seal ring (49), at least one tolerance ring (70, 71), and a pair of sealing rings (68, 69). The runner (52) is circumscribed about a shaft (57) or a carrier (91) within a recess (98) along the shaft (57) and is bounded by a shoulder (55 or 92) and a clamping ring (74). At least one non-sealing spring mechanism (58 or 88) is disposed between and directly contacts the shoulder (55 or 92) and the first end (53) of the runner (52). A second end (54) of the runner (52) directly contacts the clamping ring (74). In other embodiments, at least one non-sealing spring mechanism (58 or 88) is disposed between and directly contacts the second end (54) and the clamping ring (74) and the first end (53) directly contacts the shoulder (55 or 92). An anti-rotation element (76, 89, or 96) is attached to the clamping ring (74), carrier (91), or shaft 57 and extends into a slot (78) or hole or slot (97) along the runner (52). The spring(s) (58 or 88) applies a biasing force (99) onto the runner (52) toward the clamping ring (74) or shoulder (55 or 92). The annular seal ring (49) is rotationally stationary and circumscribed about the runner (52). The tolerance ring(s) (70, 71) directly contacts the runner (52) and the shaft (57). The runner (52) is fixed to the shaft (57) or carrier (91) via the tolerance ring(s) (70, 71), anti-rotation element (76, 89, or 96), and spring(s) (58 or 88) so that the runner (52) rotates with the shaft (57). The sealing rings (68, 69) directly contact the runner (52) and the shaft (57) along the annular gap (72) about the tolerance ring(s) (70, 71).

Classes IPC  ?

• F01D 11/00 - Prévention ou réduction des pertes internes du fluide énergétique, p. ex. entre étages
• F02C 7/28 - Agencement des dispositifs d'étanchéité
• F01D 11/02 - Prévention ou réduction des pertes internes du fluide énergétique, p. ex. entre étages par obturation non contact, p. ex. du type labyrinthe

Abrégé

The disclosure describes a windback device for a circumferential seal within a turbine engine. The windback device includes an annular collar (11) at one end of an annular fluid seal housing (8), at least one inclined thread (27), and a plurality of inclined baffles (42) separately disposed along an outer circumferential surface (44) of a rotatable runner (5). The housing (8) is adapted at another end for an annular seal (18). The collar (11) has an opening (25) therethrough sized to receive the runner (5) without contact. The annular seal (18) surrounds and sealingly engages the runner (5). The threads (27) extend from an inner face (26) of the collar (11) toward the runner (5). The baffles (42) are separately recessed in or raised above the outer circumferential surface (44) of the runner (5). The baffles (42) are interposed between the runner (5) and threads (27). Each baffle (42) is separated from the threads (27) via a radial clearance. Threads (27) and baffles (42) direct lubricant away from the annular seal (18).

Classes IPC  ?

• F01D 11/12 - Prévention ou réduction des pertes internes du fluide énergétique, p. ex. entre étages pour obturations de l'espace entre extrémités d'aubes du rotor et stator utilisant un élément de friction allongé, p. ex. un élément d'usure, déformable ou contraint de façon élastique
• F02C 7/28 - Agencement des dispositifs d'étanchéité
• F01D 11/08 - Prévention ou réduction des pertes internes du fluide énergétique, p. ex. entre étages pour obturations de l'espace entre extrémités d'aubes du rotor et stator

Produits et services

Manufacture for others of seals and sealing assemblies comprised of seals and structural parts for limiting fluid leakage between reciprocating or rotating components within machinery Seals and sealing assemblies comprised of seals and structural parts for limiting fluid leakage between reciprocating or rotating components within machinery Repair, maintenance, and refurbishment for others of seals and sealing assemblies comprised of seals and structural parts for limiting fluid leakage between reciprocating or rotating components within machinery Design, development, and testing for others of seals and sealing assemblies comprised of seals and structural parts for limiting fluid leakage between reciprocating or rotating components within machinery

Produits et services

Manufacture for others of seals and sealing assemblies comprised of seals and structural parts for limiting fluid leakage between reciprocating or rotating components within machinery Seals and sealing assemblies comprised of seals and structural parts for limiting fluid leakage between reciprocating or rotating components within machinery Repair, maintenance, and refurbishment for others of seals and sealing assemblies comprised of seals and structural parts for limiting fluid leakage between reciprocating or rotating components within machinery Design, development, and testing for others of seals and sealing assemblies comprised of seals and structural parts for limiting fluid leakage between reciprocating or rotating components within machinery

Abrégé

A segmented intershaft seal assembly (1) for use between an inner shaft (2) and an outer shaft (3) within a turbine engine is presented. The intershaft seal assembly (1) includes annular end rings (10, 11), an annular seal element (9) with an inverted "T"-shaped cross section, at least one resilient element (18), an annular spacer ring (12), carriers (24, 31), counterweights (20, 27 or 56, 61), and hydrodynamic grooves (34). The intershaft seal assembly (1) is secured to the inner shaft (2). The resilient element(s) (18) biases seal segments (44) away from the inner shaft (2) toward the outer shaft (3). The counterweights (20, 27 or 56, 61) are disposed about the seal segments (44) and substantially negate forces imposed by the seal segments (44) outward toward the outer shaft (3). The hydrodynamic grooves (34) are disposed along an inner annular surface (35) of the outer shaft (3) and direct fluid onto an outer surface (36) along the seal segments (44) when the outer shaft (3) rotates. The hydrodynamic grooves (34) form a thin-film layer (37) and non-contact seal that separates the seal segments (44) from the outer shaft (3) which otherwise provide a contact-type seal.

Classes IPC  ?

• F02C 7/28 - Agencement des dispositifs d'étanchéité
• F01D 11/08 - Prévention ou réduction des pertes internes du fluide énergétique, p. ex. entre étages pour obturations de l'espace entre extrémités d'aubes du rotor et stator

Abrégé

A segmented intershaft seal assembly (11) for counter-rotating and co-rotating turbine engines is described. The assembly includes a pair of end rings (63, 64), an annular seal element (54), and at least one resilient element (58, 81, or 83). At least one end ring (63, 64) has a flange (74, 75) that extends from one side thereof. The flange (74, 75) has a lower annular surface (70). The seal element (54) includes at least two seal segments (57). Each seal segment (57) includes a ring segment (55) and a ring flange segment (56). The ring segment (55) has an upper radial surface (69). The ring flange segment (56) directly contacts and extends from the upper radial surface (69) forming either a substantially "T"-shaped or "L"-shaped cross section. The seal segments (57) are disposed between the end rings (63, 64). At least one resilient element (58, 81, or 83) biases each seal segment (57) away from the inner shaft (19) so that the upper radial surface (69) contacts the lower annular surface (70) and a portion of the ring flange segment (56) extends beyond the flanges (74, 75).

Classes IPC  ?

• F16J 15/24 - Joints d'étanchéité entre deux surfaces mobiles l'une par rapport à l'autre par presse-étoupes pour garnitures élastiques ou plastiques la garniture étant comprimée radialement ou tangentiellement
• F16J 15/34 - Joints d'étanchéité entre deux surfaces mobiles l'une par rapport à l'autre par bague glissante pressée contre la face plus ou moins radiale d'une des deux parties

Abrégé

The disclosure describes a windback device for a circumferential seal within a turbine engine. The windback device includes an annular collar at one end of an annular fluid seal housing, at least one inclined thread, and a plurality of inclined baffles separately disposed along an outer circumferential surface of a rotatable runner. The housing is adapted at another end for an annular seal. The collar has an opening therethrough sized to receive the runner without contact. The annular seal surrounds and sealingly engages the runner. The threads extend from an inner face of the collar toward the runner. The baffles are separately recessed in or raised above the outer circumferential surface of the runner. The baffles are interposed between the runner and threads. Each baffle is separated from the threads via a radial clearance. Threads and baffles direct lubricant away from the annular seal.

Classes IPC  ?

• F16J 15/447 - Garnitures à labyrinthe
• F16J 15/00 - Joints d'étanchéité
• F16J 15/16 - Joints d'étanchéité entre deux surfaces mobiles l'une par rapport à l'autre
• F16J 15/34 - Joints d'étanchéité entre deux surfaces mobiles l'une par rapport à l'autre par bague glissante pressée contre la face plus ou moins radiale d'une des deux parties
• F01D 11/02 - Prévention ou réduction des pertes internes du fluide énergétique, p. ex. entre étages par obturation non contact, p. ex. du type labyrinthe
• F01D 11/00 - Prévention ou réduction des pertes internes du fluide énergétique, p. ex. entre étages
• F02C 7/28 - Agencement des dispositifs d'étanchéité
• F16J 15/40 - Joints d'étanchéité entre deux surfaces mobiles l'une par rapport à l'autre par un fluide

Abrégé

An intershaft seal system capable of communicating a balanced pressure profile onto forward and aft faces along a piston ring is presented. The seal system includes forward and aft mating rings and a piston ring. Mating rings include a plurality of divergent flow grooves adjacent to the piston ring. Each divergent flow groove includes a pair of grooves which intersect at and are substantially symmetric about an apex. The piston ring includes channels which direct a fluid from a high pressure region upward or downward and through the piston ring and onto the divergent flow grooves. The divergent flow grooves separate the fluid in a symmetrically divergent fashion prior to communication onto the piston ring. The divergent flow grooves communicate a substantially symmetric pressure force onto each side of the piston ring so as to minimize twist thereof, thus reducing wear along the piston ring and increasing seal life.

Classes IPC  ?

• F16J 15/34 - Joints d'étanchéité entre deux surfaces mobiles l'une par rapport à l'autre par bague glissante pressée contre la face plus ou moins radiale d'une des deux parties
• F16J 9/24 - Organes empêchant la rotation des segments dans leurs gorges

Abrégé

The present invention relates to circumferential seal ring segments positioned around a rotating shaft so as to prevent fluids from leaking from a lubricant sump during both low and high pressure conditions. The circumferential seal is comprised of a plurality of adjoining annular ring segments facing the rotating shaft. Each sealing ring segment includes a dead end circumferential groove on a shaft-side face of each sealing ring such that, when the segments are joined, the circumferential dead end groove of each segment extends arcuately in the direction of shaft rotation. At least one additional groove is contained on the shaft-side face of each sealing ring segment. The additional groove(s) directs and creates pressurized air within the dead end circumferential groove, either directly or indirectly maintaining a seal between the ring segments and the shaft. A bleed hole may also be provided to create a seal between each sealing segment.

Classes IPC  ?

• F16J 15/44 - Garnitures discontinues
• F16J 9/20 - Segments à section spécialeSegments racleurs d'huile

Abrégé

An intershaft seal system capable of communicating a balanced pressure profile onto forward and aft faces along a piston ring is presented. Seal system includes forward and aft mating rings and a piston ring. Mating rings include a plurality of divergent flow grooves adjacent to the piston ring. Each divergent flow groove includes a pair of grooves which intersect at and are substantially symmetric about an apex. The piston ring includes channels which direct a fluid from a high pressure region upward, downward, or directly through the piston ring and onto the divergent flow grooves. The divergent flow grooves separate the fluid in a symmetrically divergent fashion prior to communication onto the piston ring. The divergent flow grooves communicate a substantially symmetric pressure force along the radial width of the piston ring so as to minimize twisting thereof, thus reducing wear along the piston ring and increasing seal life.

Classes IPC  ?

• F16J 15/34 - Joints d'étanchéité entre deux surfaces mobiles l'une par rapport à l'autre par bague glissante pressée contre la face plus ou moins radiale d'une des deux parties

Abrégé

An intershaft seal system (29) capable of communicating a balanced pressure profile onto a forward face (50) and/or an aft face (49) along a piston ring (35) is presented. The intershaft seal system (29) includes forward and aft mating rings (33, 34) and a piston ring (35). One or both mating rings (33, 34) could include a plurality of divergent flow grooves (47) adjacent to the piston ring (35). Each divergent flow groove (47) includes a pair of grooves (27, 28) which intersect at and are substantially symmetric about an apex (48). The piston ring (35) includes channels (53) which direct a fluid from a high pressure region upward, downward, or directly through the piston ring (35) and onto the divergent flow grooves (47). The divergent flow grooves (47) separate the fluid in a symmetrically divergent fashion prior to communication onto the piston ring (35). The divergent flow grooves (47) communicate a substantially symmetric pressure force along the radial width (Wp) of the piston ring (35) so as to minimize twisting thereof, thus reducing wear along the piston ring (35) and increasing seal life.

Classes IPC  ?

• F16C 32/06 - Paliers non prévus ailleurs comprenant un élément mobile supporté par un coussinet de fluide engendré, au moins en grande partie, autrement que par la rotation de l'arbre, p. ex. paliers hydrostatiques à coussinet d'air

Abrégé

An improved air-riding seal system for turbine engines is presented. The seal system includes a movable primary seal assembly, a stationary secondary seal assembly, and at least one structure to increase the stiffness of a thin film between the primary seal and a rotating component. The primary seal assembly includes an annular seal ring and an arcuate support arm. The annular seal ring has a cross section that is substantially L-shaped and a surface with a step face and a circumferential dam. The arcuate support arm has a tooth at one end adjacent to an outermost circumferential surface along the seal runner, which could include an optional notch. The tooth and outermost circumferential surface are separated by a gap. A plurality of radial dams disposed along the surface in an outward radial arrangement from the circumferential darn is provided to improve the stiffness of the thin film.

Classes IPC  ?

• F16J 15/00 - Joints d'étanchéité
• F16J 15/447 - Garnitures à labyrinthe

Abrégé

An improved air-riding seal system for turbine engines is presented. The seal system includes a movable primary seal assembly, a stationary secondary seal assembly, and at least one structure to increase the stiffness of a thin film between the primary seal and a rotating component. The primary seal assembly includes an annular seal ring and an arcuate support arm. The annular seal ring has a cross section that is substantially L-shaped and a surface with a step face and a circumferential dam. The arcuate support arm has a tooth at one end adjacent to an outermost circumferential surface along the seal runner, which could include an optional notch. The tooth and outermost circumferential surface are separated by a gap. The secondary seal ring is disposed between and contacts the primary seal assembly and housing structure so as to form a bore seal and a face seal therewith. A plurality of radial dams disposed along the surface in an outward radial arrangement from the circumferential dam is provided to improve the stiffness of the thin film. Features of the invention allow for higher operating speeds.

Classes IPC  ?

• F16J 15/00 - Joints d'étanchéité
• F16J 15/447 - Garnitures à labyrinthe

Abrégé

The present invention relates to circumferential seal ring segments positioned around a rotating shaft so as to prevent fluids from leaking from a lubricant sump during both low and high pressure conditions. The circumferential seal is comprised of a plurality of adjoining annular ring segments facing the rotating shaft. Each sealing ring segment includes a dead end circumferential groove on a shaft-side face of each sealing ring such that, when the segments are joined, the circumferential dead end groove of each segment extends arcuately in the direction of shaft rotation. At least one additional groove is contained on the shaft-side face of each sealing ring segment. The additional groove(s) directs and creates pressurized air within the dead end circumferential groove, either directly or indirectly maintaining a seal between the ring segments and the shaft. A bleed hole may also be provided to create a seal between each sealing segment.

Classes IPC  ?

• F16J 15/34 - Joints d'étanchéité entre deux surfaces mobiles l'une par rapport à l'autre par bague glissante pressée contre la face plus ou moins radiale d'une des deux parties
• F16J 15/447 - Garnitures à labyrinthe

Abrégé

The present invention relates to circumferential seal ring segments positioned around a rotating shaft so as to prevent fluids from leaking from a lubricant sump during both low and high pressure conditions. The circumferential seal is comprised of a plurality of adjoining annular ring segments facing the rotating shaft. Each sealing ring segment includes a dead end circumferential groove on a shaft-side face of each sealing ring such that, when the segments are joined, the circumferential dead end groove of each segment extends arcuately in the direction of shaft rotation. At least one additional groove is contained on the shaft-side face of each sealing ring segment. Each additional groove may contain a pocket. The additional groove(s) directs and creates pressurized air within the dead end circumferential groove, either directly or indirectly maintaining a seal between the ring segments and the shaft. A bleed hole may also be provided to create a seal between each sealing segment.

Classes IPC  ?

• F16J 15/40 - Joints d'étanchéité entre deux surfaces mobiles l'une par rapport à l'autre par un fluide
• F16J 15/447 - Garnitures à labyrinthe

Abrégé

A circumferential seal system for sealing a high pressure region from a low pressure region separated by a runner with an outer circumferential surface and a seal ring disposed about the outer circumferential surface is described. The seal system includes a plurality of groove sets separately disposed along the outer circumferential surface. Each groove set further includes at least two grooves. At least one groove within each groove set exerts a lifting force via a fluid from the high pressure region onto the seal ring as the runner translates with respect to the seal ring along an axis substantially perpendicular to the rotation of the runner. The continuous feed of fluid onto the seal ring ensures a thin film between the seal ring and the runner regardless of their relative arrangement during axial excursions of the runner resulting from conditions within a turbine engine.

Classes IPC  ?

• F16J 15/34 - Joints d'étanchéité entre deux surfaces mobiles l'une par rapport à l'autre par bague glissante pressée contre la face plus ou moins radiale d'une des deux parties
• F16J 15/447 - Garnitures à labyrinthe

Abrégé

The present invention relates to circumferential seal ring segments positioned around a rotating shaft so as to prevent fluids from leaking from a lubricant sump during both low and high pressure conditions. The circumferential seal is comprised of a plurality of adjoining annular ring segments facing the rotating shaft. Each sealing ring segment includes a dead end circumferential groove on a shaft-side face of each sealing ring such that, when the segments are joined, the circumferential dead end groove of each segment extends arcuately in the direction of shaft rotation. Additional grooves are contained on the shaft-side face of each sealing ring segment. The additional grooves direct and create pressurized air within the dead end circumferential groove, either directly or indirectly maintaining a seal between the ring segments and the shaft. The additional grooves are comprised of a first and a second axial bore groove extending perpendicularly to a longitudinal axis of the seal ring segment in fluid communication with the dead end circumferential groove so as to direct fluid flow generated from a rotating shaft into the dead end circumferential groove wherein the first axial bore groove is spaced at one end of the seal segment and the second axial bore groove is approximately centered on the seal segment. A bleed hole may also be provided to create a seal between each sealing segment.

Classes IPC  ?

• F16J 15/34 - Joints d'étanchéité entre deux surfaces mobiles l'une par rapport à l'autre par bague glissante pressée contre la face plus ou moins radiale d'une des deux parties
• F16J 15/447 - Garnitures à labyrinthe

Abrégé

The present invention relates to circumferential seal ring segments positioned around a rotating shaft so as to prevent fluids from leaking from a lubricant sump during both low and high pressure conditions. The circumferential seal is comprised of a plurality of adjoining annular ring segments facing the rotating shaft. Each sealing ring segment includes a dead end circumferential groove on a shaft-side face of each sealing ring such that, when the segments are joined, the circumferential dead end groove of each segment extends arcuately in the direction of shaft rotation. At least one additional groove is contained on the shaft-side face of each sealing ring segment. Each additional groove is an axial bore groove extending perpendicularly to a longitudinal axis of the seal ring segment in fluid communication with the dead end circumferential groove so as to direct fluid flow generated from a rotating shaft into the dead end circumferential groove. The additional groove(s) directs and creates pressurized air within the dead end circumferential groove, either directly or indirectly maintaining a seal between the ring segments and the shaft. A bleed hole may also be provided to create a seal between each sealing segment.

Classes IPC  ?

• F16J 15/34 - Joints d'étanchéité entre deux surfaces mobiles l'une par rapport à l'autre par bague glissante pressée contre la face plus ou moins radiale d'une des deux parties
• F16J 15/447 - Garnitures à labyrinthe

Abrégé

A circumferential seal system for sealing a high pressure region from a low pressure region separated by a runner with an outer circumferential surface and a seal ring disposed about the outer circumferential surface is described. The seal system includes a plurality of groove sets separately disposed along the outer circumferential surface. Each groove set further includes at least two grooves. At least one groove within each groove set exerts a lifting force via a fluid from the high pressure region onto the seal ring as the runner translates with respect to the seal ring along an axis substantially perpendicular to the rotation of the runner. The continuous feed of fluid onto the seal ring ensures a thin film between the seal ring and the runner regardless of their relative arrangement during axial excursions of the runner resulting from conditions within a turbine engine.

Classes IPC  ?

• F16J 15/447 - Garnitures à labyrinthe
• F16J 15/34 - Joints d'étanchéité entre deux surfaces mobiles l'une par rapport à l'autre par bague glissante pressée contre la face plus ou moins radiale d'une des deux parties

Abrégé

The present invention relates to circumferential seal ring segments positioned around a rotating shaft so as to prevent fluids from leaking from a lubricant sump during both low and high pressure conditions. The circumferential seal is comprised of a plurality of adjoining annular ring segments facing the rotating shaft. Each sealing ring segment includes a dead end circumferential groove on a shaft-side face of each sealing ring such that, when the segments are joined, the circumferential dead end groove of each segment extends arcuately in the direction of shaft rotation. At least one additional groove is contained on the shaft-side face of each sealing ring segment. The additional groove(s) directs and creates pressurized air within the dead end circumferential groove, either directly or indirectly maintaining a seal between the ring segments and the shaft. A bleed hole may also be provided to create a seal between each sealing segment.

Classes IPC  ?

• F16J 15/40 - Joints d'étanchéité entre deux surfaces mobiles l'une par rapport à l'autre par un fluide
• F16J 15/447 - Garnitures à labyrinthe

Abrégé

An improved air-riding seal system for turbine engines is presented. The seal system includes a movable primary seal assembly, a stationary secondary seal assembly, and at least one structure to increase the stiffness of a thin film between the primary seal and a rotating component. The primary seal assembly includes an annular seal ring and an arcuate support arm. The annular seal ring has a cross section that is substantially L-shaped and a surface with a step face and a circumferential dam. The arcuate support arm has a tooth at one end adjacent to an outermost circumferential surface along the seal runner, which could include an optional notch. The tooth and outermost circumferential surface are separated by a gap. The secondary seal ring is disposed between and contacts the primary seal assembly and housing structure so as to form a bore seal and a face seal therewith. A plurality of hydrodynamic pockets disposed along the circumferential dam and/or a plurality of radial dams disposed along the surface in an outward radial arrangement from the circumferential dam are provided to improve the stiffness of the thin film. Features of the invention allow for higher operating speeds.

Classes IPC  ?

• F16J 15/00 - Joints d'étanchéité
• F16J 15/447 - Garnitures à labyrinthe

Abrégé

A circumferential seal system for sealing a high pressure region from a low pressure region separated by a runner with an outer circumferential surface and a seal ring disposed about the outer circumferential surface is described. The seal system includes a plurality of groove sets separately disposed along the outer circumferential surface. Each groove set further includes at least two grooves. At least one groove within each groove set exerts a lifting force via a fluid from the high pressure region onto the seal ring as the runner translates with respect to the seal ring along an axis substantially perpendicular to the rotation of the runner. The continuous feed of fluid onto the seal ring ensures a thin film between the seal ring and the runner regardless of their relative arrangement during axial excursions of the runner resulting from conditions within a turbine engine.

Classes IPC  ?

• F16J 15/16 - Joints d'étanchéité entre deux surfaces mobiles l'une par rapport à l'autre

Abrégé

A circumferential seal system for sealing a high pressure region (4) from a low pressure region (3) separated by a runner (20) with an outer circumferential surface (19) and a seal ring (6) disposed about the outer circumferential surface (19) is described. The seal system includes a plurality of groove sets (24a-24c) separately disposed along the outer circumferential surface (19). Each groove set (24a-24c) further includes at least two grooves (21). At least one groove (21) within each groove set (24a-24c) exerts a lifting force via a fluid from the high pressure region (4) onto the seal ring (6) as the runner (20) translates with respect to the seal ring (6) along an axis substantially perpendicular to the rotation of the runner (20) The continuous feed of fluid onto the seal ring (6) ensures a thin film between the seal ring (6) and the runner (20) regardless of their relative arrangement during axial excursions of the runner (20) resulting from conditions within a turbine engine.

Classes IPC  ?

• F16J 15/32 - Joints d'étanchéité entre deux surfaces mobiles l'une par rapport à l'autre par joints élastiques, p. ex. joints toriques
• F01D 11/08 - Prévention ou réduction des pertes internes du fluide énergétique, p. ex. entre étages pour obturations de l'espace entre extrémités d'aubes du rotor et stator
• F02C 7/28 - Agencement des dispositifs d'étanchéité

Abrégé

An improved air-riding seal system (1) for turbine engines is presented. The seal system (1) includes a movable primary seal assembly (2), a stationary secondary seal assembly, and at least one structure to increase the stiffness of a thin film between the primary seal and a rotating component. The primary seal assembly (2) includes an annular seal ring (23) and an arcuate support arm (25). The annular seal ring (23) has a cross section that is substantially L-shaped and a surface with a step face (4) and a circumferential dam (3). The arcuate support arm (25) has a tooth (27) at one end adjacent to an outermost circumferential surface (26) along the seal runner (19), which could include an optional notch (37). The tooth (27) and outermost circumferential surface (26) are separated by a gap (28). The secondary seal ring (6) is disposed between and contacts the primary seal assembly (2) and housing structure (5) so as to form a bore seal and a face seal therewith. A plurality of radial dams (35) disposed along the surface in an outward radial arrangement from the circumferential dam (3) are provided to improve the stiffness of the thin film. Features of the invention allow for higher operating speeds.

Classes IPC  ?

• F02C 7/28 - Agencement des dispositifs d'étanchéité
• F01D 11/02 - Prévention ou réduction des pertes internes du fluide énergétique, p. ex. entre étages par obturation non contact, p. ex. du type labyrinthe
• F16J 15/24 - Joints d'étanchéité entre deux surfaces mobiles l'une par rapport à l'autre par presse-étoupes pour garnitures élastiques ou plastiques la garniture étant comprimée radialement ou tangentiellement
• F16J 15/34 - Joints d'étanchéité entre deux surfaces mobiles l'une par rapport à l'autre par bague glissante pressée contre la face plus ou moins radiale d'une des deux parties
• F16J 15/46 - Joints d'étanchéité par bague de garniture dilatée ou comprimée dans son logement par pression d'un fluide, p. ex. garnitures gonflables
• F16J 15/50 - Joints d'étanchéité entre organes mobiles l'un par rapport à l'autre, par étanchéité sans surfaces mobiles l'une par rapport à l'autre, p. ex. des garnitures étanches aux fluides pour transmettre un mouvement au travers d'une paroi

Abrégé

An improved air-riding seal system for turbine engines is presented. The seal system includes a movable primary seal assembly, a stationary secondary seal assembly, and at least one structure to increase the stiffness of a thin film between the primary seal and a rotating component. The primary seal assembly includes an annular seal ring and an arcuate support arm. The annular seal ring has a cross section that is substantially L-shaped and a surface with a step face and a circumferential dam. The arcuate support arm has a tooth at one end adjacent to an outermost circumferential surface along the seal runner, which could include an optional notch. The tooth and outermost circumferential surface are separated by a gap. The secondary seal ring is disposed between and contacts the primary seal assembly and housing structure so as to form a bore seal and a face seal therewith. A plurality of hydrodynamic pockets disposed along the circumferential dam and/or a plurality of radial dams disposed along the surface in an outward radial arrangement from the circumferential dam are provided to improve the stiffness of the thin film. Features of the invention allow for higher operating speeds.

Classes IPC  ?

• F16J 15/00 - Joints d'étanchéité
• F16J 15/447 - Garnitures à labyrinthe

Abrégé

A double dam reverse pressure face seal assembly for use in the turbomachine having a tunnel extending through the machine for high pressure air passage therein during normal machine operating has a mating ring positioned annularly respecting the tunnel for flow of lubricating oil generally outwardly through passageways in the ring and a sealing member biased against an interface surface of the mating ring, the sealing member including a first dam presenting a first contact face to the interface surface of the mating ring, a second dam integral with an outboard of the first dam, presenting a second contact face to the interface surface of the mating ring and a channel between the first and second dams for annularly downward flow of oil leaking inwardly past the second dam towards a channel exit.

Classes IPC  ?

• F04D 29/08 - Joints d'étanchéité

Abrégé

An intershaft seal assembly (11) for counter-rotating and co-rotating turbine engines is presented. The seal assembly (11) includes a pair of end rings (13, 14) and a seal element (12). At least one end ring (13, 14) has a flange (18, 21), with upper and lower surfaces (45, 46, 29, 30), disposed along and extending from one side of the ring (13, 14). The seal element (12) includes a ring (24), with outer surface (27), and a ring flange (25) wider than the ring (24). The ring flange (25) is disposed along and extends diametrically from the outer surface (27), the latter also contacting the lower surface (29, 30) along at least one flange (13, 14). The seal element (12) is disposed between the end rings (13, 14) so that the ring flange (25) extends beyond the flanges (18, 21). The invention avoids the wear and heating problems inherent to intershaft seal systems, thus allowing the seal element (12) to be composed of a temperature resistant metal, metal alloy, or carbon graphite.

Classes IPC  ?

• F01D 11/08 - Prévention ou réduction des pertes internes du fluide énergétique, p. ex. entre étages pour obturations de l'espace entre extrémités d'aubes du rotor et stator
• F01D 25/00 - Parties constitutives, détails ou accessoires non couverts dans les autres groupes ou d'un intérêt non traité dans ces groupes
• F02C 7/28 - Agencement des dispositifs d'étanchéité

Abrégé

The present invention relates to a windback device and method of use to prevent lubricant from leaking from a lubricant sump. More specifically, the present invention is comprised of a windback device within a lubricant sump formed from the coupling of an annular sump housing, an annular fluid seal assembly, and a bearing. The annular housing substantially surrounds the runner to form a chamber. The seal assembly is coupled to a sump housing both of which are adapted to receive a rotatable runner such that a sealed chamber is formed around the runner. A plurality of inclined threads extend along an inner face of the windback device and are angled such that lubricant or fluid splashed from the rotating shaft is redirected away from a shaft seal element of the annular fluid seal and through leak off slots leading to the sump housing chamber.

Classes IPC  ?

• F16J 15/40 - Joints d'étanchéité entre deux surfaces mobiles l'une par rapport à l'autre par un fluide
• F16J 15/44 - Garnitures discontinues
• F16J 15/447 - Garnitures à labyrinthe
• F01D 11/02 - Prévention ou réduction des pertes internes du fluide énergétique, p. ex. entre étages par obturation non contact, p. ex. du type labyrinthe

Abrégé

A force balanced seal for use with a rotor in the turbomachine has a member in opposed facing disposition to the rotor with a face dam portion of the member having a surface parallel with the sealing surface of the rotor, a groove in the member facing the rotor and bounding the face dam surface, an air bearing surface in the member facing the sealing surface of the rotor, a second passageway through the member from the air bearing surface to a radially outwardly facing surface of the member and a first passageway through the member from the groove to a member surface facing oppositely from the air bearing surface. An operating clearance between the seal and rotor is maintained by a closing force, exerted through a plurality of springs, and an opposing opening force created by pressurized air venting through the second passageway to the first passageway.

Classes IPC  ?

• F01D 11/00 - Prévention ou réduction des pertes internes du fluide énergétique, p. ex. entre étages
• F04D 29/08 - Joints d'étanchéité

Abrégé

A thermally actuated shutdown seal (10) provides a shutdown seal usable in a pump (64) having a primary seal assembly (40) positioned circumferentially about a rotating shaft (62) for separating a region(66) of high pressure coolant fluid from the shaft. The shutdown seal includes a two-piece interlocked housing (42, 48) which encompasses carbon graphite ring segments (46) positioned circumferentially about the shaft, a garter spring (34) and a series of compression spring (32) . The replaceable insert (40) with machined recess contains the shutdown seal assembly and is biased axially with a wave spring (24) and held with the annular recess by a closure ring (49) . The seal is designed with coolant fluid flow directly in contact with such ring segments and specially designed paths around the ring segments during normal pump operation. The seal requires a thermally actuated means (16) for moving the two-piece interlocked housing axially into a blocking position within the coolant flow path (50) to shutdown and minimize fluid flow bypassing the ring segments and between the ring segments .

Classes IPC  ?

• F16J 15/00 - Joints d'étanchéité
• F16J 15/16 - Joints d'étanchéité entre deux surfaces mobiles l'une par rapport à l'autre
• F16J 15/38 - Joints d'étanchéité entre deux surfaces mobiles l'une par rapport à l'autre par bague glissante pressée contre la face plus ou moins radiale d'une des deux parties rendue étanche par une garniture
• F16J 15/44 - Garnitures discontinues
• F04D 29/12 - Joints d'étanchéité pour arbre utilisant des bagues

Produits et services

Seals and sealing assemblies comprised of seals and their structural parts for limiting fluid leakage in mechanical equipment for use in turbo-machinery

Produits et services

seals, and sealing assemblies comprised of seals and their structural parts, for limiting fluid leakage in mechanical equipment, for use in turbo-machinery

Produits et services

Repair and maintenance for third parties of seals and sealing assemblies used in turbo machinery for limiting and controlling fluid transport between and among regions of differing pressure

Produits et services

Seals and sealing assemblies comprised of seals and their structural parts, for limiting fluid leakage in mechanical equipment for use in turbo-machinery