CN114934949A

CN114934949A - Rolling bearing capable of effectively reducing noise

Info

Publication number: CN114934949A
Application number: CN202210474473.XA
Authority: CN
Inventors: 王慧鹏; 朱兴高; 李鹏; 栾家辉; 代永德
Original assignee: CHINA AEROSPACE STANDARDIZATION INSTITUTE; Jiangxi University of Science and Technology
Current assignee: CHINA AEROSPACE STANDARDIZATION INSTITUTE; Jiangxi University of Science and Technology
Priority date: 2022-04-29
Filing date: 2022-04-29
Publication date: 2022-08-23
Anticipated expiration: 2042-04-29
Also published as: CN114934949B

Abstract

The invention discloses a rolling bearing capable of effectively reducing noise, which belongs to the technical field of bearings and comprises a bearing outer ring, a bearing inner ring and a support ring which are coaxially arranged, wherein the support ring is arranged between the bearing outer ring and the bearing inner ring; and the outer side of each group of the vibration damping balls is provided with a vibration damping retaining bracket for limiting the vibration damping balls, the outer side of the connecting rod is sleeved with a sleeve, and the sleeve is fixedly connected to the bearing outer ring through a vibration damping rod. The bearing can reduce the noise of the bearing in use and improve the concealment of equipment.

Description

Rolling bearing capable of effectively reducing noise

Technical Field

The invention belongs to the technical field of bearings, and particularly relates to a rolling bearing capable of effectively reducing noise.

Background

In a shafting structure, a rolling bearing has the advantages of small self friction resistance, high transmission efficiency, compact structure and the like, so the rolling bearing is widely applied in modern industry, and meanwhile, the bearing is an important transmission device in various power transmission systems, and the performance of the bearing directly influences the performance of the whole transmission system; in the field of aerospace, the main factors influencing the rocket launching accuracy and launching speed are the inertial navigation platform of the rocket and the rocket engine. Inertial navigation platform precision bearings and rocket engine bearings are referred to as the "heart" of these two key components because of their importance. The bearing surface has some surface waviness under the influence of the structural characteristics of the bearing, so that the bearing inevitably generates vibration noise in the transmission process, and the concealment of some invisible equipment such as aerospace, submarines and the like is seriously influenced when the invisible equipment is used.

Disclosure of Invention

In view of the above, an object of the present invention is to provide a rolling bearing capable of effectively reducing noise, which can reduce noise generated when the bearing is used, and improve concealment of equipment.

In order to achieve the purpose, the invention provides the following technical scheme:

the invention relates to a rolling bearing capable of effectively reducing noise, which comprises a bearing outer ring, a bearing inner ring and a support ring which are coaxially arranged, wherein the support ring is arranged between the bearing outer ring and the bearing inner ring; each group the outside of damping ball is provided with and is used for the spacing damping of damping ball keeps the support, and two sets of damping keep the support to pass through the connecting rod and connect, the connecting rod is annular equipartition between two sets of damping keep the support, each the outside cover of connecting rod is equipped with a sleeve pipe, the sleeve pipe is through a damping pole fixed connection to the bearing inner race.

The invention has the beneficial effects that:

according to the rolling bearing capable of effectively reducing noise, the support ring is arranged between the bearing outer ring and the bearing inner ring, so that the function of intermediate support can be achieved, two groups of damping balls are uniformly embedded between the support ring and the bearing outer ring along the circumference, vibration of the bearing in the using process can be transmitted to the damping balls through the support ring, noise generation is suppressed from the source, and the noise reduction effect is good.

In the device, the two groups of damping balls are symmetrical relative to the central plane of the bearing and are limited by the damping maintaining bracket, so that two sides of the outer ring of the bearing can be simultaneously supported, the condition that the axis between the outer ring and the inner ring of the bearing deflects relatively is avoided, the transmission of the bearing is more stable, and the generation of vibration and noise is further reduced.

The device of the invention adopts the vibration reduction ball with certain flexibility on the surface, and the vibration reduction ball can have certain deformation under certain pressure, so that the whole device is easy to install, and the installation of the ball is easier, thereby the clearance between the ball and the inner ring and the support ring can be minimized after the installation is finished, the processing progress of the bearing is not required to be further improved, the dependence of the processing device is reduced, and the popularization and the implementation are easy. The device can prolong the service life of mechanical equipment, ensure the normal use of instruments, meters and control equipment and improve the concealment of the used equipment.

Additional advantages, objects, and features of the invention will be set forth in the description which follows and in part will become apparent to those having ordinary skill in the art upon examination of the following or may be learned from practice of the invention. The objectives and other advantages of the invention may be realized and attained by the means of the instrumentalities and combinations particularly pointed out hereinafter.

Drawings

In order to make the object, technical scheme and beneficial effect of the invention more clear, the invention provides the following drawings for explanation:

FIG. 1 is a schematic structural view of a rolling bearing;

fig. 2 is a front view of the rolling bearing;

FIG. 3 is a schematic view of the structure of the support ring;

FIG. 4 is a schematic view of a shock absorbing retaining bracket;

FIG. 5 is a schematic view of a damping ball;

FIG. 6 is a cross-sectional view taken along C-C of FIG. 2;

FIG. 7 is an enlarged view of FIG. 6 at A;

FIG. 8 is a cross-sectional view taken along line D-D of FIG. 2;

fig. 9 is an enlarged view of fig. 4 at B.

The drawings are numbered as follows: the damping device comprises a bearing outer ring 1, a bearing inner ring 2, a support ring 3, a ball 4, a damping ball 5, a connecting rod 6, a sleeve 7, a damping rod 8, a stepped hole 9, a nut 10, a first support body 11, a second support body 12, a first caulking groove 13, a second caulking groove 14, a connecting hole 15, a first inner groove 16, a second inner groove 17, a first outer groove 18, a second outer groove 19, a damping hole 20, a sound insulation plate 21, a center hole 22, an elastic vibration isolation ball 23, a blind hole 24, a sound insulation plate 25, a via hole 26 and a steel ball 27.

Detailed Description

As shown in fig. 1-2, the rolling bearing capable of effectively reducing noise of the present invention includes a bearing outer ring 1, a bearing inner ring 2 and a support ring 3, which are coaxially disposed, the bearing outer ring 1 is connected with a device, and the bearing inner ring 2 is in transmission connection with a shaft. The support ring 3 sets up between bearing inner race 1 and bearing inner race 2, inlays along the circumference equipartition between bearing inner race 2 and the support ring 3 and is equipped with a plurality of balls 4, and the outside surface of bearing inner race 2 and the inside surface of support ring 3 are provided with the slot that corresponds with ball 4, and this slot can play certain spacing effect, avoids ball 4 to drop, and ball 4 adopts stainless steel material to make.

In the embodiment of the invention, as shown in fig. 3, which is a schematic structural diagram of a support ring, two groups of damping balls 5 are uniformly embedded between the support ring 3 and a bearing outer ring 1 along the circumference, each group of damping balls 5 is uniformly embedded between the support ring 3 and the bearing outer ring 1, and the damping balls are arranged between the support ring 3 and the bearing outer ring 1 in two rows. The damping balls 5 are completely equal in structural size, the two groups of damping balls 5 are symmetrical relative to the central plane of the bearing, the damping balls 5 are provided with flexible outer surfaces and can receive partial vibration of the support ring 3 by serving as a medium, so that the spacing of the bearing outer ring 1 can buffer the space between the support ring 3 and the bearing outer ring 1 to a certain extent, and noise transmission is reduced; as shown in fig. 4, the outer side of each group of damping balls 5 is provided with a damping maintaining bracket for limiting the damping balls 5, the two groups of damping maintaining brackets are connected through a connecting rod 6, the connecting rod 6 is uniformly distributed between the two groups of damping maintaining brackets in an annular manner, the outer side of each connecting rod 6 is sleeved with a sleeve 7, and the sleeve 7 is fixedly connected to the bearing outer ring 1 through a damping rod 8. Through setting up the damping and keeping the support to keep the support to be fixed in bearing inner race 1 with the damping, when playing spacingly, let have certain distance between each damping ball 5, avoid colliding each other between the damping ball 5, and the damping keeps the support can drive damping ball 5 motion in opposite directions simultaneously, each can avoid damping ball 5 to a certain extent because irregular rotation leads to and the damping keeps the collision of support, reduces the noise of transmission.

In this embodiment, damping rod 8 adopts rubber materials to make, when playing the connecting action, reduces the transmission of vibration, and the external screw thread has been seted up to damping rod 8's outer end, sets up the through-hole that supplies damping rod 8 to pass on bearing inner race 1, and the outer end of through-hole is provided with a step hole 9, and damping rod 8's outer end is fixed with bearing inner race 1 through nut 10, and nut 10 is buried in step hole 9 in a hidden manner, avoids the influence that nut 10 protrusion caused bearing inner race 1's connecting action.

In this embodiment, the damping holding bracket includes annular first bracket body 11 and second bracket body 12, first bracket body 11 and second bracket body 12 are symmetrical to each other, one side that first bracket body 11 and second bracket body 12 are relative is integrated into one piece respectively and has first caulking groove 13 and second caulking groove 14, first caulking groove 13 and second caulking groove 14 cooperate to form and be used for the spacing stop collar of damping ball 5, connecting hole 15 that is used for linking to each other with connecting rod 6 has all been seted up on first bracket body 11 and the second bracket body 12, can be convenient for dismantle and connect first bracket body 11 and second bracket body 12, first bracket body 11 and second bracket body 12 are fixed through connecting rod 6, can play spacing effect to damping ball 5, simultaneously, can make the motion of two sets of damping balls 5 reach synchronization, make holistic motion stability better. The inner side of the bearing outer ring 1 is respectively provided with a first inner groove 16 and a second inner groove 17 for matching the two groups of damping balls 5, and the outer side of the support ring 3 is respectively provided with a first outer groove 18 and a second outer groove 19 for matching the two groups of damping balls 5. Can be used for spacing two sets of damping balls 5 respectively, prevent that two sets of damping balls 5 from deviating from in the installation clearance.

In this embodiment, as shown in fig. 6 to 9, two sets of muffling holes 20 are formed in the support ring 3, the muffling holes 20 penetrate through the inner side surface and the outer side surface of the support ring 3, the two sets of muffling holes 20 are located on both sides of the balls 4, the two sets of muffling holes 20 are respectively corresponding to the first outer groove 18 and the second outer groove 19, the muffling holes 20 are formed to reduce noise generated by the balls 4 inside the support ring 3 and to transmit the noise to the device, and the noise gradually dissipates energy in the muffling holes 20 by the blocking effect of the muffling holes 20, thereby reducing the transmission of the noise.

In this embodiment, the two groups of muffling holes 20 are arranged in a staggered manner in the circumferential direction, so that the noise in the two groups of muffling holes 20 is prevented from resonating, and on the contrary, the noise waves of the two groups of muffling holes can be offset to some extent. The sound attenuation holes 20 are internally provided with a plurality of sound insulation plates 21 at intervals, the center of each sound insulation plate 21 is provided with a center hole 22, a light elastic vibration isolation ball 23 is placed between every two adjacent sound insulation plates 21, the diameter of each elastic vibration isolation ball 23 is larger than that of each center hole 22, and the elastic vibration isolation balls 23 are influenced by sound waves or vibration and can bounce between the sound insulation plates 21 to further dissipate energy.

In this embodiment, as shown in fig. 5, the plurality of blind holes 24 are disposed on the outer side surface of the damping ball 5, the plurality of layers of acoustic panels 25 are disposed at intervals in the blind holes 24 along the axial direction of the blind holes 24, the through hole 26 is disposed at the center of the acoustic panel 25, noise can enter the acoustic panel 25 through the blind holes 24 by setting the acoustic panel 25, and the damping effect of the damping ball 5 can be better by continuously dissipating energy through the sound insulation effect of the acoustic panel 25.

In this embodiment, the inner side of the damping ball 5 forms a cavity, the cavity is filled with a steel ball 27, and the steel ball 27 is used for supporting the damping ball 5, so that the supporting effect of the damping ball 5 can be increased, and the compactness of the whole bearing is better.

Finally, it is noted that the above-mentioned preferred embodiments illustrate rather than limit the invention, and that, although the invention has been described in detail with reference to the above-mentioned preferred embodiments, it will be understood by those skilled in the art that various changes in form and detail may be made therein without departing from the scope of the invention as defined by the appended claims.

Claims

1. The utility model provides a can effectively reduce antifriction bearing of noise which characterized in that: the damping device comprises a bearing outer ring, a bearing inner ring and a support ring which are coaxially arranged, wherein the support ring is arranged between the bearing outer ring and the bearing inner ring, a plurality of balls are uniformly embedded between the bearing inner ring and the support ring along the circumference, two groups of damping balls are uniformly embedded between the support ring and the bearing outer ring along the circumference, each group of damping balls are uniformly embedded between the support ring and the bearing outer ring, the two groups of damping balls are symmetrical relative to the central plane of the bearing, and the damping balls have flexible outer surfaces; each group the outside of damping ball is provided with and is used for the spacing damping of damping ball keeps the support, and two sets of damping keep the support to pass through the connecting rod and connect, the connecting rod is annular equipartition between two sets of damping keep the support, each the outside cover of connecting rod is equipped with a sleeve pipe, the sleeve pipe is through a damping pole fixed connection to the bearing inner race.

2. The rolling bearing effective in reducing noise according to claim 1, characterized in that: the damping rod is made of rubber materials, the outer end of the damping rod is provided with an external thread, the bearing outer ring is provided with a through hole for the damping rod to pass through, the outer end of the through hole is provided with a step hole, the outer end of the damping rod is fixed with the bearing outer ring through a nut, and the nut is buried in the step hole.

3. The rolling bearing effective in reducing noise according to claim 1, characterized in that: the vibration reduction holding support comprises an annular first support body and an annular second support body, a first caulking groove and a second caulking groove are formed in one side, opposite to the first support body and the second support body, of the first support body respectively in an integrated mode, the first caulking groove and the second caulking groove are matched to form a limiting ring for limiting a vibration reduction ball, connecting holes for connecting with the connecting rod are formed in the first support body and the second support body, and the first support body and the second support body are fixed through the connecting rod.

4. The rolling bearing effective in reducing noise according to claim 1, characterized in that: the bearing comprises a bearing outer ring and a support ring, wherein the inner side of the bearing outer ring is respectively provided with a first inner groove and a second inner groove which are used for matching two groups of damping balls, and the outer side of the support ring is respectively provided with a first outer groove and a second outer groove which are used for matching two groups of damping balls.

5. The rolling bearing effective in reducing noise according to claim 4, characterized in that: two groups of silencing holes are formed in the support ring, penetrate through the inner side face and the outer side face of the support ring, are located on two sides of the ball and correspond to the first outer groove and the second outer groove respectively in position.

6. The rolling bearing effective in reducing noise according to claim 5, characterized in that: the two groups of silencing holes are arranged in a staggered manner in the circumferential direction.

7. Rolling bearing effective in reducing noise according to claim 6, characterized in that: the noise reduction device is characterized in that multiple layers of sound insulation boards are arranged in the noise reduction hole at intervals, a center hole is formed in the center of each sound insulation board, a light elastic vibration isolation ball is placed between every two adjacent sound insulation boards, and the diameter of each elastic vibration isolation ball is larger than that of the center hole.

8. The rolling bearing effective in reducing noise according to any one of claims 1 to 7, wherein: the damping ball is characterized in that a plurality of blind holes are formed in the outer side surface of the damping ball, a plurality of layers of damping plates are arranged in the blind holes at intervals along the axial direction of the blind holes, and a through hole is formed in the center of each damping plate.

9. The rolling bearing effective in reducing noise according to claim 8, characterized in that: a cavity is formed on the inner side of the vibration reduction ball, a steel ball is filled in the cavity, and the steel ball is used for supporting the vibration reduction ball.