Abrégé

The invention relates to a resonator (1, 1') for reducing the level of airborne noise, comprising at least a first annular chamber (2, 2') arranged between an inlet piece (5, 5') and an outlet piece (6, 6'), an inner tube (4, 4') arranged between the inlet piece (5, 5') and the outlet piece (6, 6'), and wall apertures (13) as a connection to the adjacent annular chamber (2, 2', 3, 3'). The invention is characterized in that the inner tube (4, 4') is arranged in the vertical direction downwards eccentrically with respect to the at least one annular chamber (2, 2', 3, 3'), and that the inner tube (4, 4') has a suction opening (15) transversely with respect to its longitudinal axis (7) in the vertical direction at the bottom to the respectively adjacent annular chamber (2, 2', 3, 3').

Classes IPC  ?

• G10K 11/172 - Procédés ou dispositifs de protection contre le bruit ou les autres ondes acoustiques ou pour amortir ceux-ci, en général utilisant des effets de résonance
• B60H 1/00 - Dispositifs de chauffage, de refroidissement ou de ventilation

Abrégé

The invention relates to a device (1, 1', 1'') for lowering flow noises, comprising a first connection piece (2, 2'), a second connection piece (3, 3') facing away from the first connection piece (2, 2'), an outer sleeve (4, 4') arranged between the first connection piece (2, 2') and the second connection piece (3, 3'), and an inner sleeve (5, 5') arranged between the connection pieces (2, 2', 3, 3'), wherein at least two volume chambers (7, 7', 8, 8', 9, 9', 10, 10') separated from each other by at least one peripherally extending radial collar (6, 6') are arranged between the inner sleeve (5, 5') and the outer sleeve (4, 4'), which volume chambers are connected to the line space (13, 13') enclosed by the inner sleeve (5, 5') by means of openings (11, 11') in the wall (12, 12') of the inner sleeve (5, 5'), wherein the radial collar (6, 6') has a sealing ring (15, 15', 15'') at the free end (14, 14') of the radial collar. The invention is characterized in that the sealing ring (15, 15', 15'') is designed as a ring cap, which reaches over the collar (6, 6') and lies against a wall surface (22, 35) of the sleeve (4, 4', 5, 5') adjacent to the free end (14, 14') of the collar (6, 6') in a sealing manner by means of a peripherally extending outer lateral surface (21, 21'') of the ring cap and against the end face (25, 25') of the free end (14, 14') of the collar (6, 6') in a sealing manner by means of the inner lateral surface (23, 23'') of the sealing ring facing away from the outer lateral surface (21, 21'') or lies against the side surface (28) of the collar (6, 6') facing the ring cap in a sealing manner by means of an annular radial contact surface (26, 26'') extending parallel to the radial collar (6, 6').

Classes IPC  ?

• F16L 55/027 - Étranglements
• F02M 35/12 - Silencieux d'admission
• F16L 55/033 - Absorbeurs de bruit

Abrégé

The invention relates to a device (1, 1', 1'', 1''') for lowering flow noises, comprising a first connection piece (2, 2', 2'', 2'''), a second connection piece (3, 3', 3'', 3''') facing away from the first connection piece, an outer sleeve (4, 4', 4'', 4''') arranged between the first connection piece (2, 2', 2'', 2''') and the second connection piece (3, 3', 3'', 3'''), and an inner sleeve (5, 5', 5'', 5''') arranged between the connection pieces (2, 2', 2'', 2''', 3, 3', 3'', 3'''), wherein at least two volume chambers (7, 7', 8, 8', 8'', 9, 9', 10, 10', 10''') separated from each other by at least one peripherally extending radial collar (6, 6', 6'', 6''') are arranged between the inner sleeve (5, 5', 5'', 5''') and the outer sleeve (4, 4', 4'', 4'''), which volume chambers are connected to the line space (13, 13'''') enclosed by the inner sleeve (5, 5', 5'', 5''') by means of openings (11) in the wall (12) of the inner sleeve (5, 5', 5'', 5'''), wherein the radial collar (6, 6', 6'', 6''') has a sealing ring (15, 15', 15'', 15''', 15'''', 27, 27') composed of an elastomer at the free end (14, 14') of the radial collar. The invention is characterized in that the sealing ring (15, 15', 15'', 15''', 15'''', 27, 27') has at least one elastic sealing lip (21, 21', 21'', 21''', 21'''', 28, 28', 29, 29') leading away from the radial collar (6, 6', 6'', 6''') at an angle, which at least one elastic sealing lip lies against the wall of the adjacent sleeve (4, 4', 4'', 4''', 5, 5', 5'', 5''') under load in a sealing manner by means of the free end (22, 22', 22''', 22'''', 30, 30', 31, 31').

Classes IPC  ?

• F02M 35/12 - Silencieux d'admission
• F16L 55/02 - Absorbeurs d'énergieAbsorbeurs de bruit

Abrégé

The invention relates to a resonator (1) for lowering airborne sound and solid-borne sound, comprising at least two annular chambers (2, 3, 17) arranged between an inlet piece (22) and an outlet piece (21) and comprising an inner pipe (4), which is arranged at least between the inlet piece (22) and the outlet piece (21) and which has wall holes (23) as a connection to the adjacent annular chambers (2, 3, 17). The invention is characterized in that a first annular chamber (2) has a U-shaped circumferential wall (6) coaxial to the resonator longitudinal axis (5), which U-shaped circumferential wall transitions at both ends into cylindrical end pieces (7, 8) for accommodating the inner pipe (4), and that at least one second annular chamber (3) has an L-shaped circumferential wall (12) coaxial to the resonator longitudinal axis (5), which L-shaped circumferential wall transitions into a cylindrical end piece (13) at the end of the L-shaped circumferential wall facing away from the first annular chamber (2) and which L-shaped circumferential wall lies on the part of the outer wall (9) of the first annular chamber (2) extending parallel to the resonator longitudinal axis (5) at the end (14) of the L-shaped circumferential wall facing the first annular chamber (2).

Classes IPC  ?

• F02M 35/12 - Silencieux d'admission
• F16L 55/033 - Absorbeurs de bruit

Abrégé

The method for producing a damper (74) for an air line of an internal combustion engine (70) comprises the following steps: A temperature-controlled inner part (20) having passages (24) is provided. A tubular preform (22) of an outer jacket (62) is produced from a thermoplastic melt. The temperature-controlled inner part (20) is attached to a blowing mandrel (38) of a blow mold (30), which is open, the blowing mandrel (38) has outlet openings (42), and the passages (24) are positioned over the outlet openings (42). The temperature-controlled preform (22) is brought over the inner part (20). The blow mold (30) is closed and the preform (22) is blown against the walls of the blow mold (30), whereby an outer jacket (62) is obtained. At the same time, local connections between the inner part (20) and the outer jacket (62) are obtained by pressing the preform (22) and the inner part (20) against each other in some regions. Finally, the blow mold (30) is opened and the damper (74) is removed.

Classes IPC  ?

• F02M 35/12 - Silencieux d'admission
• F16L 55/033 - Absorbeurs de bruit
• B29C 49/00 - Moulage par soufflage, c.-à-d. en soufflant une préforme ou une paraison dans un moule pour obtenir la forme désiréeAppareils à cet effet