DEVICE FOR LOWERING FLOW NOISES

Abstract

A device (1) for lowering flow noises has opposed first and second connection pieces (2, 3), and outer and inner sleeves (4, 5) between the connection pieces. A radial collar (6) is between the sleeves (4, 5) and forms separated volume chambers. Openings (11) in the inner sleeve (5) connect the volume chambers to a line space (13) enclosed by the inner sleeve (5). A sealing ring (15) at the free end (14) of the collar (6) defines a ring cap with a lateral surface (21) that reaches over the collar (6) and seals against the sleeve (4, 5) adjacent the free end (14) of the collar (6) and that has a surface (23, 26) that seals against either an end face (25) of the collar (6) or a side surface (28) of the collar (6) extending parallel to the radial collar (6).

Claims

1. 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) and an inner sleeve (5, 5) arranged between the first connection piece (2, 2) and the second connection piece (3, 3), at least one peripherally extending radial collar (6, 6) arranged between the inner sleeve (5, 5) and the outer sleeve (4, 4) and defining at least two volume chambers (7, 7, 8, 8, 9, 9, 10, 10) separated from each other by the at least one radial collar (6, 6), openings (11, 11) in a wall (12, 12) of the inner sleeve (5, 5) and connecting the volume chambers to a line space (13, 13) enclosed by the inner sleeve (5, 5), and a sealing ring (15, 15, 15) at a free end (14, 14) of the radial collar wherein the sealing ring (15, 15, 15) is a ring cap that 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 a 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).

2. The device of claim 1, wherein the sealing ring (15, 15, 15) has elastic properties.

3. The device of claim 1, wherein the outer lateral surface (21, 21) of the sealing ring (15, 15) lies under tension in a sealing manner against the wall surface (22, 35) of the sleeve (4, 5) adjacent to the free end (14, 14) of the collar (6, 6), and the inner lateral surface (23, 23) of the sealing ring (15, 15) facing away from the outer lateral surface, lies under tension in a sealing manner against the peripherally extending end face of the free end of the collar.

4. The device of claim 3, wherein the sealing ring (15, 15) is constructed from a wire mesh.

5. The device of claim 3, wherein the sealing ring (15, 15) is constructed from a mesh made of silicate fibers.

6. The device of claim 3, wherein the sealing ring (15, 15) is constructed from a compound mesh made of wire and silicate fibers.

7. The device of claim 1, wherein the outer lateral surface (21) of the sealing ring (15) lies under tension in a sealing manner against the wall surface (22) of the sleeve (4) adjacent to the free end (14) of the collar (6) and the sealing ring (15), with the annular radial contact surface (26) extending parallel to the radial collar (6), lies under tension in a sealing manner against the side surface (28) of the collar facing toward the ring cap.

8. The device of claim 7, wherein the sealing ring (15) has a jacket (24) with clamp profiles (29, 30) formed by the lateral surfaces (21, 23) at an end facing away from the radial contact surface (26), the clamp profiles (29, 30), in the mounted state, abut under tension with the second lateral surface (36) of the collar (6) facing away from the side surface (28) and the contact surface (26) of the ring cap being tensioned with corresponding tension against the side surface (28) facing toward the contact surface (26).

9. The device of claim 7, wherein the sealing ring (15) is constructed of a resilient stainless steel.

10. The device of claim 1, wherein the peripherally extending radial collar (6), with its fixed end facing away from the free end (14), is securely arranged at the inner sleeve (5) and with its free end (14) is sealed against the outer sleeve (4) by means of the sealing ring (15, 15).

11. The device of claim 1, wherein the peripherally extending radial collar (6) has a fixed end facing away from the free end (14), the fixed end being securely arranged at the outer sleeve (4) and with the free end (14) being sealed against the inner sleeve (5) by means of the sealing ring (15).

12. The device according of claim 1, wherein the sleeve (5, 4) connected to the fixed end of the collar (6, 6) and the collar (6, 6) are made of plastic.

13. The device of claim 1, wherein the sleeve (4, 5) that is not connected to the fixed end of the collar (6, 6) is made of aluminum or metal.

Description

BRIEF DESCRIPTION OF THE DRAWINGS

[0025] FIG. 1 a lateral cross-sectional view of a device for lowering flow noises, having an outer sleeve and an inner sleeve, with integrally molded collars and with sealing rings made of a wire mesh that reach over the respective collar as a ring cap.

[0026] FIG. 2 an enlarged view of Detail II from FIG. 1.

[0027] FIG. 3 a cross-sectional lateral view of a device for lowering flow noises, having an outer sleeve with integrally molded collars and with sealing rings made of a wire mesh that reach over the respective collar as a ring cap and an inner sleeve.

[0028] FIG. 4 an enlarged view of Detail IV from FIG. 3.

[0029] FIG. 5 an enlarged view of the sealing ring from FIG. 1 along the line V-V from

[0030] FIG. 6 a frontal view of the sealing ring from FIG. 5 as seen from direction VI.

[0031] FIG. 7 a cross-sectional lateral view of an additional device for lowering flow noises, having an outer sleeve and an inner sleeve with integrally molded collars and with sealing rings made of a resilient stainless steel that reach over the respective collar as a ring cap and which have a plurality of clamp profiles.

[0032] FIG. 8 an enlarged view of Detail VIII from FIG. 7.

[0033] FIG. 9 a lateral view of the sealing ring from FIG. 7.

[0034] FIG. 10 a top view of the sealing ring from FIG. 9.

[0035] FIG. 11 an enlarged detail view of the sealing ring along Line XI-XI from FIG. 10 in its unmounted state, with the mounted state indicated by dotted lines.

DETAILED DESCRIPTION

[0036] A device 1 for lowering flow noises (silencer) essentially comprises a first connection piece 2, a second connection piece 3, an outer sleeve 4 and an inner sleeve 5.

[0037] In the exemplary embodiments, the outer sleeve 4 and the inner sleeve 5 are arranged concentrically with respect to each other and between the first connection piece 2 and the second connection piece 3. In particular, the outer sleeve 4 can differ from the circular shape and can, for example, be constructed from two half shells (not shown). Between the inner sleeve 5 and the outer sleeve 4, in each case two adjacent volume chambers 7, 8, 9, 10 separated from each other by a peripherally extending radial collar 6 are arranged, said volume chambers being connected to the line space 13, which is enclosed by the inner sleeve 5, by means of openings 11 in the wall 12 of the inner sleeve 5. In the exemplary embodiments, the openings 11 are shown as slits. However, they can also be configured as holes, for example.

[0038] The first connection piece 2 forms an inlet piece and the second connection piece 3 forms an outlet piece. In principle, the first connection piece 2 can also form the outlet piece, and the second connection piece 3 can form the inlet piece.

[0039] According to the exemplary embodiment in FIG. 1, the peripherally extending radial collar 6 is securely arranged at the inner sleeve 5, by being integrally molded thereon, for example, and has at its free end 14 a sealing ring 15 made of a wire mesh for sealing against the outer sleeve 4. The first connection piece 2 has at its end facing toward the second connection piece 3 a side wall 16 that laterally delimits the first volume chamber 7 from the first connection piece 2, i.e. in the longitudinal direction, and in the exemplary embodiment it is connected to the inner sleeve 5 (although this is not obligatory). With its first end 17 facing toward the first connection piece 2, the outer sleeve 4 lies against the side wall 16 of the connection piece 2. According to the exemplary embodiment from FIG. 1, a seal 18 made of an elastomer is arranged in a groove ahead of the side wall 16 in the direction of the first end 17. The second connection piece 3 has, at the second end 19 of the outer sleeve 4 facing away from the first connection piece 2, a side wall 20 that delimits the volume chamber 10 laterally toward the second connection piece 3, i.e. in the longitudinal direction, and in the exemplary embodiment it is connected to the outer sleeve 4 (although this is not obligatory).

[0040] According to the exemplary embodiment from FIG. 2 (Detail II from FIG. 1) and FIGS. 5-6, the sealing ring 15 is constructed as a ring cap that reaches over the collar 6 and with a peripherally extending outer lateral surface 21 lies under tension in a sealing manner against a wall surface 22 of the outer sleeve 4 adjacent to the free end 14 of the collar 6. With its inner lateral surface 23 facing away from the outer lateral surface 21, the jacket 24 of the ring cap lies under tension in a sealing manner against the end face 25 of the free end 14 of the collar 6. The elastic properties of the sealing ring 15, which is constructed from a wire mesh, enable the jacket 24 to seal the intermediate space between the free end 14 and the adjacent wall surface 22 of the outer sleeve 4. With an annular radial contact surface 26 of a ring wall 27 extending parallel to the radial collar 6, said ring wall merging into the jacket of the annular cap, the sealing ring 15 abuts a side surface 28 of the collar 6.

[0041] According to the device 1 of the exemplary embodiment from FIGS. 3 and 4 (Detail IV of FIG. 3), the peripherally extending radial collar 6 is securely arranged at the outer sleeve 4, by means of being integrally molded thereon, for example, and has at its free end 14 the sealing ring 15 made of the wire mesh for sealing against the inner sleeve 5. Between the inner sleeve 5 and the outer sleeve 4 are arranged in each case two adjacent volume chambers 7, 8, 9, 10 separated from each other by a peripherally extending radial collar 6, said volume chambers being connected to the line space 13, which is enclosed by the inner sleeve 5, by means of openings 11 in the wall 12 of the inner sleeve 5. At its end facing toward the second connection piece 3 the first connection piece 2 has a side wall 16 that laterally delimits the first volume chamber 7 toward the first connection piece 2, i.e. in the longitudinal direction, and in the exemplary embodiment it is connected to the outer sleeve 4 (although this is not obligatory). The outer sleeve 4 lies, with its second end 19 facing toward the second connection piece 3, against the side wall 20 of the connection piece 3. The side wall 20 laterally delimits the volume chamber 10 toward the second connection piece 3, i.e. in the longitudinal direction, and is connected to the inner sleeve 5. The sealing ring 15 lies, with its peripherally extending outer lateral surface 21, under tension in a sealing manner against the wall surface 35 of the outer sleeve 5 adjacent to the free end 14 of the collar 6 The jacket 24 of the ring cap lies, with its inner lateral surface 23 facing away from the outer lateral surface 21, under tension in a sealing manner against the end face 25 of the free end 14 of the collar 6.

[0042] According to the exemplary embodiment in FIGS. 7 and 8 (Detail VIII of FIG. 7) and FIGS. 9-11, the sealing ring 15 of the device 1 is constructed as a resilient ring cap which reaches around the collar 6 and which, with a peripherally extending outer lateral surface 21 of the jacket 24, lies under tension in a sealing manner against the wall surface 22 of the outer sleeve 4 adjacent to the free end 14 of the collar 6. With an annular radial contact surface 26 of a ring wall 27 extending parallel to the radial collar 6, said ring wall merging into the jacket 24 of the ring cap, the sealing ring 15 lies under tension in a sealing manner against the side surface 28 of the collar 6 facing toward the ring wall 27

[0043] The sealing ring 15 has, at its jacket 24 formed by the lateral surfaces 21 and 23, at its end facing away from the contact surface 26, a plurality of clamp profiles 29, 30 that in the mounted state lie under tension against the second side surface 35 of the collar 6 facing away from the side surface 28 and by means of which the contact surface 26 of the ring cap is placed under corresponding tension against the lateral surface 28 facing toward the contact surface 26.

[0044] The sealing ring 15 preferably has a second ring cap arranged with mirror symmetry (without clamp profiles) that has a second jacket 31 which, with its outer lateral surface 32, also lies under tension in a sealing manner against the wall surface 22. In the direction toward the ring wall 27, the second jacket 31 transitions into a second ring wall 33 that extends parallel to the first ring wall 27 and which at its end 34 facing away from the second jacket 31 transitions arcuately into the first ring wall 27.

[0045] Of course, the embodiments discussed in the specific description and shown in the figures are merely illustrative exemplary embodiments of the present invention. For example, the inlet and outlet, i.e. the flow direction, can be reversed. In addition to being applied to cylindrical cross-sections, the functional principle can also be used in connection with other cross-sectional shapes. In light of this disclosure, a person skilled in the art is given a wide range of possible variations.

LIST OF REFERENCE NUMBERS

[0046] 1, 1, 1 Device [0047] 2, 2, first connection piece [0048] 3, 3 second connection piece [0049] 4, 4, outer sleeve [0050] 5, 5 inner sleeve [0051] 6, 6 collar [0052] 7, 7 volume chamber [0053] 8, 8 volume chamber [0054] 9, 9 volume chamber [0055] 10, 10 volume chamber [0056] 11, 11 opening [0057] 12 wall of 5 [0058] 13, 13 line space of 5 [0059] 14, 14 free end of 6 [0060] 15, 15, 15 sealing ring [0061] 16, 16 side wall of 2 [0062] 17 first end of 4 [0063] 18 seal of 17 [0064] 19, 19 second end of 4 [0065] 20 side wall of 3 [0066] 21, 21, outer lateral surface of 15 [0067] 22 wall surface of 4 [0068] 23, 23, 23 inner lateral surface of 15 [0069] 24, 24, 24 jacket of 15 [0070] 25, 25 end face of 14 [0071] 26, 26 radial contact surface of 27 [0072] 27, 27, 27 ring wall of 15 [0073] 28 side surface of 6 [0074] 29 clamp profile of 15 [0075] 30 clamp profile of 15 [0076] 31 second jacket of 15 [0077] 32 outer lateral surface of 31 [0078] 33 second ring wall of von 15 [0079] 34 End of 33 [0080] 35 wall surface of 5 [0081] 36 second side surface of 6