CN115076222B - Thrust bearing longitudinal vibration damper with decoupling thrust and supporting function - Google Patents
Thrust bearing longitudinal vibration damper with decoupling thrust and supporting function Download PDFInfo
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- CN115076222B CN115076222B CN202210759500.8A CN202210759500A CN115076222B CN 115076222 B CN115076222 B CN 115076222B CN 202210759500 A CN202210759500 A CN 202210759500A CN 115076222 B CN115076222 B CN 115076222B
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- thrust
- module
- flange
- shell
- vibration damping
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Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
- F16C17/00—Sliding-contact bearings for exclusively rotary movement
- F16C17/04—Sliding-contact bearings for exclusively rotary movement for axial load only
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B63—SHIPS OR OTHER WATERBORNE VESSELS; RELATED EQUIPMENT
- B63H—MARINE PROPULSION OR STEERING
- B63H23/00—Transmitting power from propulsion power plant to propulsive elements
- B63H23/32—Other parts
- B63H23/321—Bearings or seals specially adapted for propeller shafts
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
- F16C33/00—Parts of bearings; Special methods for making bearings or parts thereof
- F16C33/30—Parts of ball or roller bearings
- F16C33/58—Raceways; Race rings
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
- F16C35/00—Rigid support of bearing units; Housings, e.g. caps, covers
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16F—SPRINGS; SHOCK-ABSORBERS; MEANS FOR DAMPING VIBRATION
- F16F15/00—Suppression of vibrations in systems; Means or arrangements for avoiding or reducing out-of-balance forces, e.g. due to motion
- F16F15/02—Suppression of vibrations of non-rotating, e.g. reciprocating systems; Suppression of vibrations of rotating systems by use of members not moving with the rotating systems
- F16F15/04—Suppression of vibrations of non-rotating, e.g. reciprocating systems; Suppression of vibrations of rotating systems by use of members not moving with the rotating systems using elastic means
- F16F15/08—Suppression of vibrations of non-rotating, e.g. reciprocating systems; Suppression of vibrations of rotating systems by use of members not moving with the rotating systems using elastic means with rubber springs ; with springs made of rubber and metal
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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Physics & Mathematics (AREA)
- Acoustics & Sound (AREA)
- Aviation & Aerospace Engineering (AREA)
- Ocean & Marine Engineering (AREA)
- Support Of The Bearing (AREA)
Abstract
The invention discloses a thrust bearing longitudinal vibration damper with decoupling thrust and supporting functions, which comprises a thrust shaft, wherein one end of the thrust shaft is provided with a connecting flange, and the thrust shaft is connected with a stern shaft through the connecting flange; the thrust shaft is sequentially provided with a thrust module, a vibration reduction module and a support module, the thrust module, the vibration reduction module and the support module are fixedly connected with each other in pairs, the thrust module is arranged close to the connecting flange, the other end of the thrust shaft penetrates through the support module, and the outer wall of the support module is connected with the ship body base. The thrust transmission function and the transverse supporting function of the thrust bearing are decoupled, a vibration damping module is designed between the thrust module and the supporting module, the transverse load of a shafting is borne by the supporting module, and the thrust module and the longitudinal vibration damping module do not bear the transverse load and only bear the longitudinal load; the longitudinal vibration transmission path of the thrust bearing is greatly simplified, complex contact sound short-circuit links are avoided, and the longitudinal vibration isolation efficiency of the shafting is improved.
Description
Technical Field
The invention relates to the field of ship vibration noise control, in particular to a thrust bearing longitudinal vibration damper with decoupling of thrust and supporting functions.
Background
The noise of the propulsion system is a main noise source of the low-speed working condition of the ship, and the characteristic of superposition of broadband and line spectrum is presented. The main mechanism of the noise formation of the propulsion system is that the excitation force of the propeller is transmitted to the ship body through a shafting to induce the vibration sound radiation of the ship body structure. Studies have shown that the propeller longitudinal excitation force is maximum, and the lateral and vertical excitation forces are about 1/5 of the longitudinal direction, so that the control of the longitudinal vibration noise of the propeller-shaft system is the key point of the noise control of the ship propulsion system.
Aiming at the control of longitudinal vibration noise of a propeller-shaft system, a vibration reduction scheme of a longitudinal vibration damper of the shaft system and a thrust bearing with a vibration reduction function is mainly adopted at present. The longitudinal vibration damper is arranged in the middle of the shaft section, so that the shaft section is broken, the continuity and bending rigidity of the shaft system are reduced, the transverse vibration and the rotary vibration of the shaft system are increased, and the transverse vibration damping design is not facilitated; meanwhile, the longitudinal shock absorber is large in size and weight, the overall weight and space resources of the ship are consumed, the overall arrangement requirements of the ship are difficult to meet, and the application and implementation difficulty of the real ship are high.
For the integrated thrust bearing with the vibration reduction function, the vibration reduction structure in the form of spiral spring, disc spring, oil-resistant rubber and the like is designed in the bearing in China, but test results show that complicated acoustic short circuit and friction contact links exist among parts such as a thrust disc, a thrust block, a supporting bearing bush, a vibration reduction assembly and the like in the vibration reduction thrust bearing, the longitudinal vibration reduction design effect is poor, and the vibration noise control requirement cannot be met.
Disclosure of Invention
Aiming at the defects in the prior art, the longitudinal vibration damper for the thrust bearing is provided with decoupling of thrust and supporting functions, so that the vibration isolation efficiency is improved, and the longitudinal vibration noise of the propeller-shaft system is reduced.
The technical scheme adopted by the invention for solving the technical problems is as follows:
a thrust bearing longitudinal vibration damper with decoupling thrust and supporting functions is characterized in that: the propeller comprises a thrust shaft, wherein one end of the thrust shaft is provided with a connecting flange, and the thrust shaft is connected with a stern shaft through the connecting flange; the thrust shaft is sequentially provided with a thrust module, a vibration reduction module and a support module, the thrust module, the vibration reduction module and the support module are fixedly connected with each other in pairs, the thrust module is arranged close to the connecting flange, the other end of the thrust shaft penetrates through the support module, and the outer wall of the support module is connected with the ship body base.
According to the technical scheme, the thrust module comprises a cylindrical shell, a thrust disc, a thrust block and a first flange, wherein a cylindrical inner cavity is formed in the shell, and a thrust shaft penetrates through the shell and is arranged on the axis of the cylindrical inner cavity; the thrust disc is arranged in the cylindrical inner cavity, and the thrust shaft is fixedly connected with the thrust disc and coaxial with the thrust disc; the thrust piece is established in the both sides of thrust dish, and first flange and the flange side fixed connection that keeps away from of casing, first flange and damping module fixed connection.
According to the technical scheme, the shell comprises an annular outer shell, and a circular sheet-shaped front car lantern ring and a back car lantern ring, wherein the front car lantern ring and the back car lantern ring are arranged on two sides of the outer shell, and form a cylindrical structure; the center department of just car lantern ring and back a car lantern ring is equipped with the first through-hole with thrust shaft external diameter assorted, and the thrust shaft passes first through-hole.
According to the technical scheme, the vibration damping module comprises a second flange, a third flange and a vibration damping rubber structure, wherein the second flange and the third flange are arranged in parallel, the vibration damping rubber structure is arranged between the second flange and the third flange, and the vibration damping rubber structure is arranged between the second flange and the third flange; the centers of the vibration damping rubber structure, the second flange and the third flange are respectively provided with a second through hole, and the thrust shaft passes through the second through holes; the second flange is fixedly connected with the thrust module, and the third flange is fixedly connected with the support module.
According to the technical scheme, the size of the second through hole is larger than the outer diameter of the thrust shaft.
According to the technical scheme, the rubber vibration reduction structure, the second flange and the third flange are vulcanized and formed; the vibration damping rubber structure is made of natural or nitrile rubber with the hardness of 65-75.
According to the technical scheme, the support module comprises a wingspan type mounting seat, a support bearing and a fourth flange, a third through hole is formed in the middle of the wingspan type mounting seat, the support bearing is arranged in the third through hole, and a thrust shaft is arranged in the support bearing; the fourth flange is fixedly connected with the side part of the wingspan type mounting seat, and the fourth flange is fixedly connected with the vibration reduction module; the wingspan type mounting seat is arranged on the ship body base.
According to the technical scheme, the wingspan type mounting seat comprises an inner ring shell, an outer ring shell and reinforcing rib plates; the support bearing is arranged in the inner ring, the side surfaces of the inner ring shell and the outer ring shell are fixedly connected with the fourth flange, and the inner ring shell and the outer ring shell are arranged in the same center; a plurality of reinforcing rib plates are distributed between the inner ring shell and the outer ring shell at equal intervals; the outer walls of the two sides of the outer ring shell are provided with horizontal mounting plates, and the heights of the mounting plates at the two sides are consistent.
According to the technical scheme, the outer ring shell adopts a circular ring integrated piece, and the mounting plates are fixedly arranged on two sides of the circular ring integrated piece.
According to the technical scheme, the outer ring shell is divided into an upper shell and a lower shell, the upper shell and the lower shell adopt a semicircular structure, and the mounting plates are arranged on two sides of the lower shell and extend outwards horizontally.
The invention has the following beneficial effects:
1. the thrust transmission function and the transverse supporting function of the thrust bearing are decoupled, a vibration damping module is designed between the thrust module and the supporting module, the transverse load of a shafting is borne by the supporting module, and the thrust module and the longitudinal vibration damping module do not bear the transverse load and only bear the longitudinal load; at the moment, the longitudinal vibration transmission path of the shafting is shafting-thrust module-longitudinal vibration reduction module-supporting module-hull base, so that the longitudinal vibration transmission path of the thrust bearing is greatly simplified, the complex contact sound short circuit link is avoided, the longitudinal vibration isolation efficiency of the shafting is improved, and the installation of a real ship is facilitated. And the vibration damping module does not bear shafting torque load, so that the vibration damping module is convenient for miniaturization design.
2. The thrust bearing scheme is full span type installation, can match the full span type thrust bearing base commonly used, and is convenient to install.
Drawings
FIG. 1 is a schematic diagram of a construction of an embodiment of the present invention;
FIG. 2 is a top view of an embodiment of the present invention;
FIG. 3 is a schematic view of a thrust module according to an embodiment of the present invention;
FIG. 4 is a side view of a thrust module of an embodiment of the present invention;
FIG. 5 is a schematic view of a vibration damping module according to an embodiment of the present invention;
FIG. 6 is a side view of a vibration reduction module according to an embodiment of the present invention;
FIG. 7 is a schematic view of a support module according to an embodiment of the present invention;
FIG. 8 is a side view of a support module according to an embodiment of the present invention;
FIG. 9 is a schematic view of a spanwise mount according to an embodiment of the present invention;
in the figure, 1, a thrust shaft; 2. a connecting flange; 3. a thrust module; 3-1, a thrust disc; 3-2, thrust blocks; 3-3, a first flange; 3-4, an outer shell; 3-5, correcting the lantern ring; 3-6, reversing the lantern ring; 4. a vibration damping module; 4-1, a second flange; 4-2, a third flange; 4-3, a vibration damping rubber structure; 4-4, a second through hole; 5. a support module; 5-1, wingspan type mounting seats; 5-2, supporting a bearing; 5-3, a fourth flange; 5-4, an inner ring shell; 5-5, an outer ring shell; 5-6, reinforcing rib plates; 5-7, mounting plate; 5-8, mounting holes; 6. and a hull base.
Detailed Description
The invention will now be described in detail with reference to the drawings and examples.
Referring to fig. 1-2, the thrust bearing longitudinal vibration damper with decoupling thrust and supporting functions provided by the invention comprises a thrust shaft 1, wherein one end of the thrust shaft is provided with a connecting flange 2, and the thrust shaft is connected with a stern shaft through the connecting flange; the thrust shaft is sequentially provided with a thrust module 3, a vibration reduction module 4 and a support module 5, the thrust module, the vibration reduction module and the support module are fixedly connected with each other in pairs, the thrust module is arranged close to the connecting flange, the other end of the thrust shaft penetrates through the support module, and the outer wall of the support module is connected with the ship body base 6.
According to the axial vibration isolation device, the thrust function and the support function of the thrust bearing are designed and decoupled, and then the vibration reduction module is designed between the thrust module and the support module and only bears longitudinal thrust, so that the axial vibration transmission path of the thrust bearing is greatly simplified, complex acoustic short circuit and contact friction links are avoided, and the axial vibration isolation effect of a shafting is improved.
Further, the thrust module comprises a cylindrical shell, a thrust disc 3-1, a thrust block 3-2 and a first flange 3-3, wherein a cylindrical inner cavity is formed in the shell, and a thrust shaft penetrates through the shell and is arranged on the axis of the cylindrical inner cavity; the thrust disc is arranged in the cylindrical inner cavity, and the thrust shaft is fixedly connected with the thrust disc and coaxial with the thrust disc; the thrust piece is established in the both sides of thrust dish, and first flange and the flange side fixed connection that keeps away from of casing, first flange and damping module fixed connection. The design of a thrust bearing thrust module is completed according to the total arrangement, the rotating speed, the thrust load and other parameters of the shafting, and the design comprises structural designs of a thrust shaft, a thrust disc, a thrust block, a bearing shell and the like; according to the size of the longitudinal vibration reduction module, the design of a first flange of the thrust module is completed; and according to the interface of the head end of the stern shaft, the design of the installation interface of the connecting flange is finished, and the stern shaft and the thrust bearing are installed through the connection interface of the connecting flange.
Further, the shell comprises an annular outer shell 3-4, a round sheet-shaped front car lantern ring 3-5 and a back car lantern ring 3-6, wherein the front car lantern ring and the back car lantern ring are arranged on two sides of the outer shell, and the front car lantern ring and the back car lantern ring form a cylindrical structure; the center department of just car lantern ring and back a car lantern ring is equipped with the first through-hole with thrust shaft external diameter assorted, and the thrust shaft passes first through-hole.
Further, the vibration damping module comprises a second flange 4-1 and a third flange 4-2 which are arranged in parallel with each other, and a vibration damping rubber structure 4-3 arranged between the second flange and the third flange, wherein the vibration damping rubber structure is arranged between the second flange and the third flange; the centers of the vibration damping rubber structure, the second flange and the third flange are respectively provided with a second through hole 4-4, and the thrust shaft passes through the second through holes; the second flange is fixedly connected with the thrust module, and the third flange is fixedly connected with the support module.
Further, the size of the second through hole is larger than the outer diameter of the thrust shaft, so that the longitudinal vibration reduction module is prevented from being contacted with the shaft section.
Further, the rubber vibration reduction structure is vulcanized and molded with the second flange and the third flange; the vibration damping rubber structure is made of natural or nitrile rubber with the hardness of 65-75, the dynamic stiffness is reduced, and the vibration damping effect is improved; the second flange and the third flange are made of forged steel or high-strength steel, so that rigidity is improved.
Further, the support module comprises a wingspan type mounting seat 5-1, a support bearing 5-2 and a fourth flange 5-3, a third through hole is formed in the middle of the wingspan type mounting seat, the support bearing is arranged in the third through hole, and a thrust shaft is arranged in the support bearing; the fourth flange is fixedly connected with the side part of the wingspan type mounting seat, and the fourth flange is fixedly connected with the vibration reduction module; the wingspan type mounting seat is arranged on the ship body base. The supporting module is rigidly mounted on the ship body base through the span-type mounting seat, so that the thrust bearing base impedance design and bearing mounting are facilitated. According to the transverse load of the shafting, the design of a support bearing of the support module is completed, and the support bearing is rigidly arranged in the middle of the wingspan type mounting seat; and according to the size of the vibration reduction module, the structural design of a fourth flange of the support module is completed, and the support module is connected with the longitudinal vibration reduction module through the fourth flange.
Further, the wingspan type mounting seat comprises an inner ring shell 5-4, an outer ring shell 5-5 and reinforcing rib plates 5-6; the support bearing is arranged in the inner ring, the side surfaces of the inner ring shell and the outer ring shell are fixedly connected with the fourth flange, and the inner ring shell and the outer ring shell are arranged in the same center; a plurality of reinforcing rib plates are distributed between the inner ring shell and the outer ring shell at equal intervals; the outer walls of the two sides of the outer ring shell are provided with horizontal mounting plates 5-7, the heights of the mounting plates on the two sides are consistent, and the mounting plates are provided with a plurality of mounting holes 5-8. The device adopts full span type installation, can be matched with a common full span type thrust bearing base, and is convenient to install.
Further, the outer ring shell adopts a circular ring integrated piece, and the mounting plates are fixedly arranged on two sides of the circular ring integrated piece.
Further, the outer ring shell is divided into an upper shell and a lower shell, the upper shell and the lower shell adopt a semicircular structure, and the mounting plates are arranged on two sides of the lower shell and extend outwards horizontally.
The working principle of the invention is as follows:
the transverse load of the shafting is borne by the supporting module, and the thrust module and the longitudinal vibration damping module do not bear the transverse load and only bear the longitudinal load. Therefore, the decoupling of the thrust transmission function and the transverse supporting function is realized, and the longitudinal vibration reduction module design and the alignment control of shafting (a stern shaft and a thrust shaft) are facilitated. At the moment, the shafting longitudinal vibration transmission path is shafting-thrust module-longitudinal vibration reduction module-supporting module-ship body base, so that the longitudinal vibration transmission path is simplified, complex contact sound short circuit and friction links are avoided, and the longitudinal vibration isolation efficiency is improved. And the vibration damping module does not bear shafting torque load, so that the vibration damping module is convenient for miniaturization design.
The foregoing is merely illustrative of the present invention and is not intended to limit the scope of the invention, which is defined by the claims and their equivalents.
Claims (9)
1. A thrust bearing longitudinal vibration damper with decoupling thrust and supporting functions is characterized in that: the propeller comprises a thrust shaft, wherein one end of the thrust shaft is provided with a connecting flange, and the thrust shaft is connected with a stern shaft through the connecting flange; the thrust shaft is sequentially provided with a thrust module, a vibration reduction module and a support module, wherein the thrust module, the vibration reduction module and the support module are fixedly connected with each other in pairs, the thrust module is arranged close to the connecting flange, the other end of the thrust shaft penetrates through the support module, and the outer wall of the support module is connected with the ship body base;
the vibration damping module comprises a second flange, a third flange and a vibration damping rubber structure, wherein the second flange and the third flange are arranged in parallel with each other, and the vibration damping rubber structure is arranged between the second flange and the third flange; the centers of the vibration damping rubber structure, the second flange and the third flange are respectively provided with a second through hole, and the thrust shaft passes through the second through holes; the second flange is fixedly connected with the thrust module, and the third flange is fixedly connected with the support module.
2. The thrust bearing longitudinal vibration damping device decoupled from the support function of claim 1, wherein: the thrust module comprises a cylindrical shell, a thrust disc, a thrust block and a first flange, wherein a cylindrical inner cavity is formed in the shell, and a thrust shaft penetrates through the shell and is arranged on the axis of the cylindrical inner cavity; the thrust disc is arranged in the cylindrical inner cavity, and the thrust shaft is fixedly connected with the thrust disc and coaxial with the thrust disc; the thrust piece is established in the both sides of thrust dish, and first flange and the flange side fixed connection that keeps away from of casing, first flange and damping module fixed connection.
3. The thrust bearing longitudinal vibration damping device decoupled from the support function of claim 2, wherein: the shell comprises an annular outer shell, and a circular sheet-shaped front car lantern ring and a circular sheet-shaped back car lantern ring, wherein the front car lantern ring and the back car lantern ring are arranged on two sides of the outer shell, and form a cylindrical structure; the center department of just car lantern ring and back a car lantern ring is equipped with the first through-hole with thrust shaft external diameter assorted, and the thrust shaft passes first through-hole.
4. The thrust bearing longitudinal vibration damping device decoupled from the support function of claim 1, wherein: the second through hole has a size greater than an outer diameter of the thrust shaft.
5. The thrust bearing longitudinal vibration damping device decoupled from the support function of claim 1, wherein: vulcanizing and forming the rubber vibration reduction structure with the second flange and the third flange; the vibration damping rubber structure is made of natural or nitrile rubber with the hardness of 65-75.
6. The thrust bearing longitudinal vibration damping device decoupled from the support function of claim 1, wherein: the support module comprises a wingspan type mounting seat, a support bearing and a fourth flange, a third through hole is formed in the middle of the wingspan type mounting seat, the support bearing is arranged in the third through hole, and a thrust shaft is arranged in the support bearing; the fourth flange is fixedly connected with the side part of the wingspan type mounting seat, and the fourth flange is fixedly connected with the vibration reduction module; the wingspan type mounting seat is arranged on the ship body base.
7. The thrust bearing longitudinal vibration damping device decoupled from the support function of claim 6, wherein: the wingspan type mounting seat comprises an inner ring shell, an outer ring shell and reinforcing rib plates; the support bearing is arranged in the inner ring, the side surfaces of the inner ring shell and the outer ring shell are fixedly connected with the fourth flange, and the inner ring shell and the outer ring shell are arranged in the same center; a plurality of reinforcing rib plates are distributed between the inner ring shell and the outer ring shell at equal intervals; the outer walls of the two sides of the outer ring shell are provided with horizontal mounting plates, and the heights of the mounting plates at the two sides are consistent.
8. The thrust bearing longitudinal vibration damping device decoupled from the support function of claim 7, wherein: the outer ring shell adopts a circular ring integrated piece, and the mounting plates are fixedly arranged on two sides of the circular ring integrated piece.
9. The thrust bearing longitudinal vibration damping device decoupled from the support function of claim 7, wherein: the outer ring shell is divided into an upper shell and a lower shell, the upper shell and the lower shell adopt a semicircular structure, and the mounting plates are arranged on two sides of the lower shell and extend outwards horizontally.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210759500.8A CN115076222B (en) | 2022-06-29 | 2022-06-29 | Thrust bearing longitudinal vibration damper with decoupling thrust and supporting function |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210759500.8A CN115076222B (en) | 2022-06-29 | 2022-06-29 | Thrust bearing longitudinal vibration damper with decoupling thrust and supporting function |
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| Publication Number | Publication Date |
|---|---|
| CN115076222A CN115076222A (en) | 2022-09-20 |
| CN115076222B true CN115076222B (en) | 2024-04-12 |
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| CN202210759500.8A Active CN115076222B (en) | 2022-06-29 | 2022-06-29 | Thrust bearing longitudinal vibration damper with decoupling thrust and supporting function |
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