CN114934949B

CN114934949B - Rolling bearing capable of effectively reducing noise

Info

Publication number: CN114934949B
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: 2023-06-27
Anticipated expiration: 2042-04-29
Also published as: CN114934949A

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 supporting ring, wherein the bearing outer ring, the bearing inner ring and the supporting ring are coaxially arranged, a plurality of balls are uniformly distributed and embedded between the bearing inner ring and the supporting ring along the circumference, two groups of vibration reduction balls are uniformly distributed and embedded between the supporting ring and the bearing outer ring along the circumference, each group of vibration reduction balls are uniformly distributed and embedded between the supporting ring and the bearing outer ring, the two groups of vibration reduction balls are symmetrical relative to the central plane of the bearing, and the vibration reduction balls have flexible outer surfaces; the outside of each group of damping balls is provided with a damping retaining bracket for limiting the damping balls, the outside of the connecting rod is sleeved with a sleeve, and the sleeve is fixedly connected to the bearing outer ring through a damping rod. The bearing can reduce noise of the bearing in use and improve 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 the shafting structure, the rolling bearing has wide application in the modern industry due to the advantages of small self friction resistance, high transmission efficiency, compact structure and the like, 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 aerospace field, the main factors affecting rocket orbit precision and orbit 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 "hearts" of these two key components due to their importance. The bearing surface is affected by the structural characteristics of the bearing, and the surface waviness of the bearing exists, so that the bearing inevitably generates vibration noise in the transmission process, and the concealment of the bearing is seriously affected when invisible equipment such as aerospace, submarines and the like 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, reducing noise when the bearing is used, and improving concealment of equipment.

In order to achieve the above purpose, the present invention provides the following technical solutions:

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, wherein the bearing outer ring, the bearing inner ring and the support ring are coaxially arranged, a plurality of balls are uniformly embedded between the bearing inner ring and the support ring along the circumference, two groups of vibration reduction balls are uniformly embedded between the support ring and the bearing outer ring along the circumference, each group of vibration reduction balls are uniformly embedded between the support ring and the bearing outer ring, the two groups of vibration reduction balls are symmetrical relative to the central plane of the bearing, and the vibration reduction balls have flexible outer surfaces; the outside of every group the 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 and pass through the connecting rod and connect, the connecting rod is annular equipartition and keeps between the support in two sets of damping, every the outside cover of connecting rod is equipped with a sleeve pipe, the sleeve pipe passes through a damping pole fixed connection to the bearing outer lane.

The invention has the beneficial effects that:

according to the rolling bearing capable of effectively reducing noise, the supporting ring is arranged between the bearing outer ring and the bearing inner ring, so that the rolling bearing can play a role in middle support, two groups of vibration reduction balls are uniformly distributed and embedded between the supporting ring and the bearing outer ring along the circumference, vibration of the bearing in the use process can be transmitted to the vibration reduction balls through the supporting ring, noise generation is restrained from the source, and the noise reduction effect is good.

In the device, the two groups of vibration reduction balls are symmetrical relative to the central plane of the bearing and limit through the vibration reduction retaining bracket, so that two sides of the outer ring of the bearing can be supported simultaneously, the condition that the axis between the outer ring and the inner ring of the bearing is deflected relatively is avoided, the bearing transmission is more stable, and the vibration and noise are further reduced.

According to the device, as the vibration reduction ball with certain flexibility on the surface is adopted, and certain deformation can exist on the vibration reduction ball under certain pressure, the whole device is easy to install, and the ball is easier to install, so that the gap between the ball and the inner ring and the supporting ring can be minimized after the ball is installed, the machining progress of the bearing is not required to be further improved, the dependence of machining equipment 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 part 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 objects and other advantages of the invention may be realized and obtained by means of the instrumentalities and combinations particularly pointed out in the specification.

Drawings

In order to make the objects, technical solutions and advantageous effects of the present invention more clear, the present invention provides the following drawings for description:

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

FIG. 2 is a front view of a rolling bearing;

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

FIG. 4 is a schematic view of the structure of the vibration damping retaining bracket;

FIG. 5 is a schematic view of the structure of a vibration damping ball;

FIG. 6 is a cross-sectional view taken along line 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 figures are marked as follows: the bearing outer ring 1, the bearing inner ring 2, the supporting ring 3, the ball 4, the damping ball 5, the connecting rod 6, the sleeve 7, the damping rod 8, the stepped hole 9, the nut 10, the first bracket body 11, the second bracket body 12, the first caulking groove 13, the second caulking groove 14, the connecting hole 15, the first inner groove 16, the second inner groove 17, the first outer groove 18, the second outer groove 19, the silencing hole 20, the sound insulation plate 21, the central hole 22, the elastic vibration isolation ball 23, the blind hole 24, the silencing plate 25, the through hole 26 and the steel ball 27.

Detailed Description

As shown in fig. 1-2, the rolling bearing capable of effectively reducing noise comprises a bearing outer ring 1, a bearing inner ring 2 and a supporting ring 3 which are coaxially arranged, wherein the bearing outer ring 1 is connected with equipment, and the bearing inner ring 2 is in transmission connection with a shaft. The supporting ring 3 is arranged between the bearing outer ring 1 and the bearing inner ring 2, a plurality of balls 4 are uniformly distributed and embedded between the bearing inner ring 2 and the supporting ring 3 along the circumference, grooves corresponding to the balls 4 are formed in the outer side surface of the bearing inner ring 2 and the inner side surface of the supporting ring 3, the grooves can play a certain limiting effect, the balls 4 are prevented from falling off, and the balls 4 are made of stainless steel materials.

In the embodiment of the invention, as shown in fig. 3, which is a schematic structural diagram of a supporting ring, two groups of vibration reduction balls 5 are uniformly embedded between the supporting ring 3 and the bearing outer ring 1 along the circumference, and each group of vibration reduction balls 5 is uniformly embedded between the supporting ring 3 and the bearing outer ring 1 and is arranged between the supporting ring 3 and the bearing outer ring 1 in two rows in parallel. The structure sizes of the vibration reduction balls 5 are completely equal, the two groups of vibration reduction balls 5 are symmetrical relative to the center plane of the bearing, the vibration reduction balls 5 are provided with flexible outer surfaces, and can receive partial vibration of the support ring 3 by acting as a medium, so that the support ring 3 and the bearing outer ring 1 can be buffered to a certain extent by limiting the bearing outer ring 1, and the transmission of noise is reduced; as shown in fig. 4, the outer side of each group of vibration reduction balls 5 is provided with vibration reduction holding brackets for limiting the vibration reduction balls 5, the two groups of vibration reduction holding brackets are connected through connecting rods 6, the connecting rods 6 are uniformly distributed between the two groups of vibration reduction holding brackets in a ring shape, a sleeve 7 is sleeved on the outer side of each connecting rod 6, and the sleeve 7 is fixedly connected to the bearing outer ring 1 through a vibration reduction rod 8. Through setting up the damping and keeping the support to with the damping keep the support fixed in bearing outer lane 1, when playing spacing, let certain distance between each damping ball 5, avoid the mutual collision between the damping ball 5, and the damping keeps the support and can drive the damping ball 5 simultaneously and move in opposite directions, each can avoid the damping ball 5 because irregular rotation lead to the collision with the damping and keeping the support to a certain extent, reduce the noise of transmission.

In this embodiment, the vibration-damping rod 8 is made of rubber material, and when playing a role in connection, the transmission of vibration is reduced, the external thread is set up to the outer end of vibration-damping rod 8, has set up the through-hole that supplies vibration-damping rod 8 to pass on the bearing outer lane 1, and the outer end of through-hole is provided with a step hole 9, and the outer end of vibration-damping rod 8 is fixed with the bearing outer lane 1 through nut 10, and nut 10 is buried in step hole 9, avoids the influence that nut 10 protrusion caused to the connection of bearing outer lane 1.

In this embodiment, the damping keeps the support to include annular first support body 11 and second support body 12, first support body 11 and second support body 12 mutual symmetry, first support body 11 and the relative one side of second support body 12 integrated into one piece respectively have first caulking groove 13 and second caulking groove 14, first caulking groove 13 and second caulking groove 14 cooperation form the spacing collar that is used for damping ball 5 spacing, all offer on first support body 11 and the second support body 12 and be used for the connecting hole 15 that links to each other with connecting rod 6, can be convenient for dismantle and connect first support body 11 and second support body 12, first support body 11 and second support body 12 are fixed through connecting rod 6, can play spacing effect to damping ball 5, simultaneously, can let the motion of two sets of damping balls 5 reach synchronous for holistic motion stability is better. The inner side of the bearing outer ring 1 is respectively formed with a first inner groove 16 and a second inner groove 17 for the cooperation of the two groups of vibration reduction balls 5, and the outer side of the support ring 3 is respectively formed with a first outer groove 18 and a second outer groove 19 for the cooperation of the two groups of vibration reduction balls 5. Can be used for limiting the two groups of vibration reduction balls 5 respectively and preventing the two groups of vibration reduction balls 5 from falling out of the installation gap.

In this embodiment, as shown in fig. 6-9, two groups of silencing holes 20 are formed on the supporting ring 3, the silencing holes 20 penetrate through the inner side surface and the outer side surface of the supporting ring 3, the two groups of silencing holes 20 are located at two sides of the ball 4, the positions of the two groups of silencing holes 20 correspond to the first outer groove 18 and the second outer groove 19 respectively, by arranging the silencing holes 20, noise generated by the ball 4 inside the supporting ring 3 can be transmitted to the device, and the noise gradually dissipates energy in the silencing holes 20 through the blocking effect of the silencing holes 20, so that the noise transmission is reduced.

In this embodiment, the two groups of sound attenuation holes 20 are arranged in a staggered manner in the circumferential direction, so as to avoid the noise in the two groups of sound attenuation holes 20 from forming resonance, otherwise, the noise waves of the two groups of sound attenuation holes can play a certain role in counteracting. The inside interval of amortization hole 20 is provided with multilayer acoustic celotex board 21, and central hole 22 has been seted up at the center of acoustic celotex board 21, has placed light elasticity vibration isolation ball 23 between two adjacent acoustic celotex board 21, and the diameter of elasticity vibration isolation ball 23 is greater than the diameter of central hole 22, and elasticity vibration isolation ball 23 receives the influence of sound wave or vibration, can beat in order to further dissipate energy between acoustic celotex board 21.

In this embodiment, as shown in fig. 5, the outer surface of the vibration damping ball 5 is provided with a plurality of blind holes 24, a plurality of layers of sound damping plates 25 are arranged in the blind holes 24 along the axial direction of the blind holes 24 at intervals, through the arrangement of the sound damping plates 25, noise can enter the sound damping plates 25 through the blind holes 24, and energy is continuously dissipated through the sound insulation effect of the sound damping plates 25, so that the vibration damping effect of the vibration damping ball 5 is better.

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

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

Claims

1. A rolling bearing capable of effectively reducing noise, characterized in that: the bearing comprises a bearing outer ring, a bearing inner ring and a supporting ring which are coaxially arranged, wherein the supporting ring is arranged between the bearing outer ring and the bearing inner ring, a plurality of balls are uniformly distributed and embedded between the bearing inner ring and the supporting ring along the circumference, two groups of vibration reduction balls are uniformly distributed and embedded between the supporting ring and the bearing outer ring along the circumference, each group of vibration reduction balls are uniformly distributed and embedded between the supporting ring and the bearing outer ring, the two groups of vibration reduction balls are symmetrical relative to the central plane of the bearing, and the vibration reduction balls have flexible outer surfaces; the outside of every group the 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 and pass through the connecting rod and connect, the connecting rod is annular equipartition and keeps between the support in two sets of damping, every the outside cover of connecting rod is equipped with a sleeve pipe, the sleeve pipe passes through a damping pole fixed connection to the bearing outer lane.

2. The rolling bearing capable of effectively reducing noise according to claim 1, characterized in that: the vibration reduction rod is made of rubber materials, external threads are formed in the outer end of the vibration reduction rod, a through hole for the vibration reduction rod to pass through is formed in the bearing outer ring, a step hole is formed in the outer end of the through hole, the outer end of the vibration reduction rod is fixed to the bearing outer ring through a nut, and the nut is buried in the step hole.

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

4. The rolling bearing capable of effectively reducing noise according to claim 1, characterized in that: 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 vibration reduction balls, and the outer side of the supporting ring is respectively provided with a first outer groove and a second outer groove which are used for matching two groups of vibration reduction balls.

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

6. The rolling bearing capable of effectively reducing noise according to claim 5, characterized in that: the two groups of sound attenuation holes are arranged in a staggered way in the circumferential direction.

7. The rolling bearing capable of effectively reducing noise according to claim 6, characterized in that: the sound-deadening device is characterized in that a plurality of layers of sound-deadening plates are arranged in the sound-deadening holes at intervals, a center hole is formed in the center of each sound-deadening plate, a light elastic vibration isolation ball is arranged between every two adjacent sound-deadening plates, and the diameter of the elastic vibration isolation ball is larger than that of the center hole.

8. Rolling bearing capable of effectively reducing noise according to any of claims 1-7, characterized in that: the vibration damping ball is characterized in that a plurality of blind holes are formed in the outer side surface of the vibration damping ball, a plurality of layers of silencing plates are arranged in the blind holes at intervals along the axial direction of the blind holes, and through holes are formed in the centers of the silencing plates.

9. The rolling bearing capable of effectively reducing noise as defined in claim 8, wherein: the inner side of the vibration reduction ball forms a cavity, a steel ball is filled in the cavity, and the steel ball is used for supporting the vibration reduction ball.