Abrégé

The present invention relates to a separator (1) for fluids having at least two components with different densities. According to the invention, the separator (1) comprises a separation chamber (2) with a substantially tubular shape and a variable pitch axial impeller (3) inserted within the separation chamber (2) and rotatable therein. The pitch of the screw (31) increases along the longitudinal axis (X) of the axial impeller (3), which imparts an axial advancement to the fluid (22) along the longitudinal axis (X). The axial rotation of the axial impeller (3) also imparts to the fluid (22) a rotation around the longitudinal axis (X), which is a function of the increase in the pitch of the screw (31) and reaches its maximum value near the axial end (25) of the separation chamber, where, due to the centrifugal effect, the two components (27, 29) of different densities of the fluid (22) separate along a radial direction (R).

Classes IPC  ?

• B01D 17/02 - Séparation de liquides non miscibles
• B01D 19/00 - Dégazage de liquides
• B04C 5/00 - Appareils dans lesquels la direction axiale du tourbillon est inversée
• F04D 3/02 - Pompes à flux axial du type à vis

Abrégé

The present application relates to an improved rotary positive-displacement machine (1) comprising a pair of meshing gear wheels (3, 5), a driving gear (3) and a driven gear (5), respectively, enclosed in a pump housing (7) with a delivery opening and an intake opening for a fluid, wherein said two gear wheels (3, 5) comprise a plurality of meshing teeth (30, 50) and wherein said two gear wheels (3, 5) comprise respective shafts (31, 51) supported by bushings (9) housed inside said pump housing (7). According to the application, the material of which said bushings (9) are made has a thermal expansion coefficient equal to the thermal expansion coefficient of the material of which said two gear wheels (3, 5) are made, minus a factor of +/- 5%.

Classes IPC  ?

• F04C 2/16 - Machines ou pompes à piston rotatif du type à engrènement extérieur, c.-à-d. avec un engagement des organes coopérants semblable à celui d'engrenages dentés d'un autre type qu'à axe interne avec des pistons rotatifs dentés à dents hélicoïdales, p. ex. du type ayant la forme d'un chevron, du type à vis

Abrégé

Improved axial piston (1) hydraulic machine (1) comprising a cylinder block with a body (3) having a central axis (RC) and housing a plurality of pistons (5) in respective axial seats (30), each of the pistons (5) is axially movable within the respective axial seat (30) and comprises a longitudinal axis (B), a first end (50) internal to the axial seat (30) and a second end (52) axially opposite to the first end (50), the hydraulic machine (1) further comprising a plate (7) inclined relative to the central axis (RC), facing the second ends (52) of the pistons (5) and in contact with them, wherein the relative rotation between the body (3) and the inclined plate (7) generates an axial movement of each of the pistons (5) within the respective axial seat (30), the axial movement of the pistons (5) being related to a fluid contained in the respective axial seat (30), wherein the hydraulic machine (1) is characterized in that each of the pistons (5) comprises, at the second end (52), a contact sphere (53) and a seat (54) for the contact sphere (53), the contact sphere (53) being partially housed in the seat (54) and being free to rotate in the seat (54), the contact sphere (53) further comprising a portion (55) external to the seat (54) and protruding from an opening (540) of the seat (54) for contacting the inclined plate (7), wherein the seat (54) for the contact sphere (53) is in fluid communication with the axial seat (30) such that said fluid at least partially fills the volume of the seat (54) comprised between the outer surface of the contact sphere (53) and the inner side surface of the seat (54).

Classes IPC  ?

• F03C 1/06 - Machines motrices à liquide à pistons alternatifs avec des cylindres multiples et caractérisées par le nombre ou la disposition des cylindres les axes des cylindres étant sensiblement coaxiaux, parallèles ou inclinés par rapport à l'axe de l'arbre principal
• F04B 1/126 - Moyens de retenue du patin de piston
• F04B 1/2078 - Plateaux oscillants
• F04B 1/124 - Pistons

Abrégé

Radial pump (1) comprising a stator (3) comprising an external stator (30) and an internal stator (32) defining an annular cavity (11) therebetween, and an impeller (5) rotatably housed between said stators (30; 32). The suction (7) is fashioned at a central portion of the internal stator (32), whereas the delivery (9) is fashioned at a radially external peripheral portion of the external stator (30). The impeller (5) comprises a plurality of deformable vanes (50, 51, 52) movable inside the annular cavity (11) and in slidable contact with the internal surface of the external stator (30). In every position of the impeller (5) with respect to the stator (3) at least two deformable vanes (51) are sealed in the portion of the annular cavity (11) between the suction (7) and the delivery (9) to isolate the delivery (9) from the suction (7). The impeller (5) is rotatable about a central internal axis (Al) offset with respect to the central external axis (AE) of the external stator (30), where the rotational eccentricity of the impeller (5) with respect to the external stator (30) determines a deformation of the deformable vanes (50, 51, 52) that contributes to the generation of flow rate of said pump (1).

Classes IPC  ?

• F04D 29/24 - Aubes
• F04D 29/02 - Emploi de matériaux spécifiés
• F04D 1/00 - Pompes à flux radial, p. ex. pompes centrifugesPompes hélicocentrifuges

Abrégé

The present invention concerns an attenuation device (1) of the fluid flow pulsation along a duct of a hydraulic circuit connected with a hydraulic machine, comprising at least an attenuation module (3) passed through by a pass-through duct (5) configured to be placed in fluid communication with said duct of said hydraulic circuit. In particular, in said attenuation module (3) a first duct (7) is obtained having an opened first end (70) in fluid communication with said pass-through duct (5), and a closed second end, said first duct (7) extending along a curved line comprising a plurality of curved sections, said first duct (7) being adapted to attenuate the pulsation of said fluid flow along said duct of said hydraulic circuit to reduce the vibrations generated by said pulsation of said fluid flow.

Classes IPC  ?

• F15B 21/00 - Caractéristiques communes des systèmes de manœuvre utilisant des fluidesSystèmes de manœuvre à pression ou parties constitutives de ces systèmes, non couverts par l'un quelconque des autres groupes de la présente sous-classe
• F04B 11/00 - Égalisation des pulsations, p. ex. au moyen de réservoirs d'airAnticavitation
• F16L 55/027 - Étranglements

Abrégé

Radial pump (1) comprising a stator (3) comprising an external stator (30) and an internal stator (32) defining an annular cavity (11) therebetween, and an impeller (5) rotatably housed between said stators (30; 32). The suction (7) is fashioned at a central portion of the internal stator (32), whereas the delivery (9) is fashioned at a radially external peripheral portion of the external stator (30). The impeller (5) comprises a plurality of deformable vanes (50, 51, 52) movable inside the annular cavity (11) and in slidable contact with the internal surface of the external stator (30). In every position of the impeller (5) with respect to the stator (3) at least two deformable vanes (51) are sealed in the portion of the annular cavity (11) between the suction (7) and the delivery (9) to isolate the delivery (9) from the suction (7). The impeller (5) is rotatable about a central internal axis (Al) offset with respect to the central external axis (AE) of the external stator (30), where the rotational eccentricity of the impeller (5) with respect to the external stator (30) determines a deformation of the deformable vanes (50, 51, 52) that contributes to the generation of flow rate of said pump (1).

Classes IPC  ?

• F04C 5/00 - "Machines" ou pompes à piston rotatif avec parois des chambres de travail déformables par résilience au moins partiellement

Abrégé

The present invention concerns an attenuation device (1) of the fluid flow pulsation along a duct of a hydraulic circuit connected with a hydraulic machine, comprising at least an attenuation module (3) passed through by a pass-through duct (5) configured to be placed in fluid communication with said duct of said hydraulic circuit. In particular, in said attenuation module (3) a first duct (7) is obtained having an opened first end (70) in fluid communication with said pass-through duct (5), and a closed second end, said first duct (7) extending along a curved line comprising a plurality of curved sections, said first duct (7) being adapted to attenuate the pulsation of said fluid flow along said duct of said hydraulic circuit to reduce the vibrations generated by said pulsation of said fluid flow.

Classes IPC  ?

• F15B 21/00 - Caractéristiques communes des systèmes de manœuvre utilisant des fluidesSystèmes de manœuvre à pression ou parties constitutives de ces systèmes, non couverts par l'un quelconque des autres groupes de la présente sous-classe
• F16L 55/027 - Étranglements
• F04B 39/00 - Parties constitutives, détails ou accessoires de pompes ou de systèmes de pompage spécialement adaptés aux fluides compressibles, non prévus dans les groupes ou présentant un intérêt autre que celui visé par ces groupes