WO2009010364A2 - Bearing arrangement - Google Patents

Abstract

The invention relates to a bearing arrangement for bearing at least one machine element in a housing, at least one damping medium (13) being provided between the components to be damped. The invention is characterized in that at least one receiving section (5, 6) for receiving the damping medium (13) is provided on at least one of the bearing surfaces to define a damping gap (7).

Description

 Laqeranordnunq

The present invention relates to a bearing assembly for supporting at least one machine element in a housing according to the closer defined in the preamble of claim 1. Art.

For example, from the publication DE 10 2005 006 210 A1 discloses a bearing assembly, in particular for rolling bearings and bearings, for the storage of rotating machine parts with a noise and vibration damping known. In the known bearing arrangement, a layer of hard particles of defined size distributed over the bearing seat is provided between a bearing ring and the machine part.

As a result, the transmission path of structure-borne noise, the z. B. when rolling a toothing, when rolling bearings and rattling loose mass is generated interrupted. Otherwise, there is a risk that these sounds in the form of vibrations in the transmission path in the outer skin of the housing and are transmitted from there to the environment.

It has been shown that in the known bearing arrangements with respect to the sound attenuation, the problem is that the bearing or the machine part is supported on the damping medium such that the damping medium flows away due to the high surface pressure through the gap formed between the respective bearing surfaces. As a result, there is a direct contact of the parts to be damped, so that then the transmission path is no longer interrupted.

Accordingly, the present invention seeks to propose a bearing assembly of the type described above, which is improved so that at any time an interruption of the transmission path of structure-borne noise and vibrations is guaranteed.

This object is solved by the features of claim 1. Further advantageous embodiments will become apparent from the dependent claims and the drawings.

Accordingly, a bearing arrangement for supporting at least one machine element in a housing is proposed, wherein at least one damping medium is provided between the components to be damped, in particular between the machine element to be supported and the housing, and wherein on at least one of the housing-side bearing surfaces and / or machine side Bearing surfaces at least one receiving area or the like is provided for the damping medium. In this way, a sufficient damping gap to avoid or to significantly reduce the transmission of sound and vibration between the components to be damped can be reliably realized.

In the inventively proposed bearing assembly ensures that the damping medium can not flow away due to the specially provided receiving area, so that in any situation an interruption of the transmission path of structure-borne noise between the components to be damped is prevented. As a damping medium, each corresponding damping properties exhibiting medium can be used.

As part of a preferred embodiment of the invention, it is provided that the receiving area comprises a plurality of mutually separate recesses or the like, regardless of the respective embodiment of the bearing assembly. This z. B. chamber-shaped depressions are introduced into the respective bearing surface to communicate with the damping medium z. B. to be filled by injection, so that direct contact is avoided on the bearing surfaces between the components to be damped. In addition, it is prevented by the separate chambers by means of webs or depressions that the damping medium can flow away laterally.

Preferably, the recesses are filled with the damping medium such that the damping gap formed between the housing-side and the machine-side bearing surfaces on the one hand sufficient to prevent direct contact and on the other hand is dimensioned so that a flow through the gap formed is prevented. It can also be provided a damping between different housing parts.

As part of a next development can be provided that the damping gap has corresponding gap seals or the like.

A possible embodiment of the invention may provide that an outer bearing ring for supporting a rotating machine element has at least one receiving area. In this embodiment, for. B. a receiving area on the radial housing wall facing the bearing surface may be provided. Depending on the type of bearing, in addition or separately, at least one further receiving region may be provided on at least one axial bearing surface facing the housing wall.

As a result, the filled with a damping medium receiving areas can ensure both an interruption of the transmission path in the radial and in the axial direction in the bearing assembly according to the invention.

In the bearing rings used, the recesses of the respective receiving area can be distributed over the entire circumference of the bearing ring in order to achieve an effective over the entire circumference damping. A further embodiment, which can be used in combination or separately from the previously described embodiment, provides that at least one receiving area is provided on at least one separate housing part for supporting the rotating machine element. As a result, the damping medium is housed on the housing side to interrupt the transmission path between the machine element and the housing. The housing part can also be designed in several parts depending on the type of storage.

In this embodiment, too, a receiving region can be provided on at least one housing part arranged radially to the bearing ring and also on at least one housing part arranged axially to the bearing ring. In this way, both the radial and the axial transmission paths are interrupted.

Also in this embodiment, each receiving area can have depressions distributed over the entire circumference of the housing part in order to realize a complete decoupling of the transmission paths.

For storage of a fixed machine element, at least one fixing bolt can be used, which is mounted on the housing wall. In this type of storage can be provided in the bearing assembly according to the invention that at least one of, preferably all fixing bolts, have at least one receiving area for the damping medium.

For example, it can be provided that the receiving area is provided on the radial bearing surface of the approximately circular fixing bolt. In this way, the transmission path for radial loads is interrupted. In order to ensure an axial decoupling, it can be provided that a held on the fixing bolt base or the like Machine element has at least one receiving area. The receiving area is thus provided on an axial bearing surface, which faces the housing wall in order to ensure an interruption of the transmission path in the axial direction as well.

A further embodiment of the invention can provide that, alternatively or additionally, a receiving area is provided on a base carrier carrying the machine element, which is assigned radially to the fixing bolt in order to ensure radial decoupling. Furthermore, as an alternative or separately to the axial decoupling, a housing wall facing the base carrier can have a receiving region on the axial bearing surface. There are also other possible arrangements of the respective receiving areas on the components possible.

Hereinafter, the present invention will be explained in more detail with reference to the drawings. Show it:

1 is a partial sectional view of a first possible embodiment of a bearing assembly according to the invention on a tapered roller bearing.

2 is a partial sectional view of a second embodiment of the bearing assembly according to the invention on a fixed bearing.

3 shows a schematic three-dimensional partial view of a third embodiment variant of the bearing arrangement according to the invention with a fixing bolt for supporting a stationary machine element;

Fig. 4 is a sectional view of FIG. 3; FIG. 5 shows a further sectional view according to FIG. 3 on a housing wall; FIG. and

6 is a partial sectional view of a fourth embodiment of the bearing assembly according to the invention with a fixing bolt for supporting a stationary machine element.

In Fig. 1, a first embodiment of the invention is shown. In this first embodiment, the bearing assembly according to the invention is a tapered roller bearing, which supports a not shown rotating machine element on a separate housing part 4.

The tapered roller bearing comprises an inner bearing ring 1 and an outer bearing ring 2, which receive tapered rollers 3 as rolling elements. The outer bearing ring 2 is mounted on the multi-part housing part 4. In order to interrupt the transmission of structure-borne noise and the vibrations between the rotating machine element or the outer bearing ring 2 and the housing part 4 and the housing wall 9, a receiving area 5 is provided on the housing part 4 in the region of the radial bearing surfaces of the housing part 4. The receiving area 5 is filled with a damping medium, so that a small damping gap 7 of, for example, about 0.1 mm between the bearing surfaces of the bearing ring 2 and the housing part 4 is formed. In this way, a direct contact of the radial bearing surfaces is prevented in the proposed bearing arrangement.

In addition, on the housing part 4, a further receiving portion 6 is provided on the axial bearing surface of the housing part 4 in order to decouple loads in the axial direction. The respective receiving areas 5, 6 are each formed as a plurality of separate recesses over the entire circumference. The depressions of the receiving areas 5, 6 are filled with the damping medium, so that the low damping gap 7 between the radial and axial bearing surfaces of the housing part 4 and the outer bearing ring 2 is realized. In this way, the direct contact of the bearing surfaces between the housing part 4 and the outer bearing ring 2 is prevented because a flow away of the damping medium due to the receiving areas 5, 6 is not possible. Thus, the transmission path of structure-borne sound is securely interrupted.

However, the damping gap 7 between the bearing surfaces will be as small as possible to prevent leakage of the damping medium from the damping gap 7. Furthermore, not shown gap seals may be provided for further sealing. The receiving areas 5, 6 may be provided in this first embodiment alternatively or additionally to the outer bearing ring 2 both axially and radially.

In Fig. 2, a second embodiment of the bearing assembly according to the invention is shown with a fixed bearing. Also in this second embodiment, a multi-part housing part 4,4 'is provided for receiving an outer bearing ring 2 of the fixed bearing. The fixed bearing receives a ball 12 as rolling elements. In contrast to the first embodiment, two axial receiving areas 6, 6 are provided in the second embodiment variant. This is because it is a fixed bearing, which ensures a support in both axial directions.

Also in the second embodiment, the receiving areas 5, 6, filled with the damping medium, so that an interruption of the respective transmission paths in the axial and radial directions is ensured by the respectively provided damping gap 7.

In Fig. 3, a third embodiment of the bearing assembly according to the invention is shown. In this third embodiment, a fixing bolt 8 is provided for supporting a housing part, not shown. For this purpose, the fixing bolt 8, as can be seen in particular from FIGS. 4 and 5, mounted on a housing wall 9. The fixing bolt 8 receives the housing part 4 with a metal sleeve 1 1. The axial bearing surface of the housing wall 9 has a base support 10 with a metallic sheath 14.

The fixing bolt 8 has a receiving area 5 on the radial bearing surface, which faces the housing part 4. The receiving area 5 has, as in the preceding embodiments, a plurality of recesses provided separately from each other in the bearing surface, wherein the depressions are distributed over the entire circumference of the bearing surface of the fixing bolt 8.

The depressions are also filled in this embodiment with the damping medium to provide a damping gap for decoupling between the bearing surfaces of the housing part 4 and the sleeve 1 1 and 8 of the fixing bolt. In order to allow an interruption of the transmission path of structure-borne noise in the axial direction as well, a receiving region 6 is provided on the axial bearing surface of the base support 10, which faces the housing part 4.

Again, this receiving area 6 consists again of several mutually separate recesses, which are distributed over the entire circumference of the axial bearing surface of the base support 10. The depressions are also filled with a damping medium in such a way that a damping gap 7 for avoiding direct contact between the bearing surfaces of the housing part 4 and the base support 10 is avoided.

Finally, FIG. 6 shows an alternative to the third embodiment, in which a receiving region 5 and a receiving region 6 are provided on the radial or axial bearing surface of the base carrier 10. The operation is the same as in the third embodiment according to FIGS. 3 to 5. In the embodiment according to FIG. 6, both an axial and a radial interruption of the transmission path of structure-borne noise are ensured by the filling of the respective receiving regions 5 and 6. In this way, the sound transmission in the radial direction is between the bearing surfaces of the fixing bolt 8 and the base carrier 10 and interrupted in the axial direction between the bearing surfaces of the base support 10 and the housing part 4. Thus, it is prevented that a sound transmission from the housing wall 9 to the two-part housing part 4,4 'takes place.

REFERENCE CHARACTERS

1 inner bearing ring

2 outer bearing ring

3 tapered rollers

4, 4 'housing part

5 radial receiving area

6 axial receiving area

7 damping gap

8 fixing bolts

9 housing wall

10 basic beams

11 sleeve

12 ball

13 damping medium

14 sheathing

Claims

claims 1. Bearing arrangement for supporting at least one machine element in a housing, wherein at least one damping medium (13) is provided between the components to be damped, characterized in that at least one receiving area (5, 6) for the damping medium (13 ) is provided for forming a damping gap (7). 2. Bearing arrangement according to claim 1, characterized in e t, that each receiving area (5, 6) comprises a plurality of separate recesses in the respective bearing surface. 3. Bearing arrangement according to claim 1 or 2, characterized in that et at the damping gap (7) is provided at least one gap seal. 4. Bearing arrangement according to one of the preceding claims, characterized ge ke n zei ch n et et, that an outer bearing ring (2) for supporting a rotating machine element has at least one receiving area. 5. Bearing arrangement according to claim 4, characterized in that the receiving area is provided on the radial bearing surface. 6. Bearing arrangement according to claim 4 or 5, characterized i c h n et, that the receiving area is provided on at least one axial bearing surface. 7. Bearing arrangement according to one of claims 4 to 6, characterized ge - ken nzeichnet that the wells of the respective receiving area over the entire circumference of the bearing ring (2) are distributed. 8. Bearing arrangement according to one of the preceding claims, characterized in that at least one separate housing part (4, 4 ') for supporting a rotating machine element has at least one receiving area (5, 6). 9. Bearing arrangement according to claim 8, characterized in that the receiving area (5) on a radial bearing surface of the housing part (4, 4 ') is provided. 10. Bearing arrangement according to claim 8 or 9, characterized i c h n et, that the receiving areas (6,) on axial bearing surfaces of the housing part (4, 4 ') are provided. 11. Bearing arrangement according to one of claims 8 to 10, characterized geke n ze ze c h n et that the recesses of the respective receiving area (5, 6) over the respective circumference of the housing part (4, 4 ') are distributed. 12. Bearing arrangement according to one of the preceding claims, characterized in that at least one fixing bolt (8) for supporting a stationary machine element has at least one receiving area (5). 13. Bearing arrangement according to claim 12, characterized in e t, that the receiving area (5) on the radial bearing surface of the approximately circular fixing bolt (8) is provided. 14. Bearing arrangement according to one of the preceding claims, characterized Porsche Style nzeich that a held on the fixing bolt (8) Base support (10) of the machine element has at least one receiving area (5, 6). 15. Bearing arrangement according to one of claims 12 to 14, characterized Porsche Style nzeich that the base support (10) has at least one receiving area (5) on the radial bearing surface. 16. Bearing arrangement according to one of claims 12 to 15, characterized g e - ken nzeich n et, that the base support (10) has at least one receiving area (6) on the axial bearing surface, which faces the housing wall (9). 17. Bearing arrangement according to one of the preceding claims, characterized in that the said base carrier (10) facing axial bearing surface of the housing wall (9) has at least one receiving area (6).