CN216842675U

CN216842675U - Angular contact ball bearing with special combined sealing structure

Info

Publication number: CN216842675U
Application number: CN202120862650.2U
Authority: CN
Inventors: 马军; 马野; 张翔
Original assignee: Shanghai Bearing Technology Research Institute
Current assignee: Shanghai Bearing Technology Research Institute
Priority date: 2021-04-25
Filing date: 2021-04-25
Publication date: 2022-06-28
Anticipated expiration: 2031-04-25

Abstract

The utility model provides an angular contact ball bearing with a special combined sealing structure, which comprises an outer ring (1), an inner ring (2), a sealing structure, balls (6) and a retainer (7); the outer ring (1) and the inner ring (2) are coaxially arranged, a raceway is formed between the outer ring (1) and the inner ring (2), a plurality of balls and the retainer (7) are arranged in the raceway, and sealing structures are arranged on two sides of the raceway; the sealing structure comprises a sealing cover (3), a framework (4) and a sealing ring (5), the framework (4) is embedded in one surface, close to the ball (6), of the sealing ring (5), and one surface, far away from the ball (6), of the sealing ring (5) is connected with the sealing cover (3); the utility model discloses a prevent that the friction pair from receiving the technological effect that pollutes or impurity got into the bearing for the bearing reliability is high, and is longe-lived, and does not need the special design seal receptacle to support the oil blanket, through inside the sealed lid embedding sealing washer, seal structure's axial and radial dimension all do not increase, save space.

Description

Angular contact ball bearing with special combined sealing structure

Technical Field

The utility model relates to a bearing design field specifically relates to an angular contact ball bearing with special combination seal structure.

Background

There are four types of existing sealing structures, namely, bonded structures, assembled structures, and bonded structures. And selecting a proper sealing structure according to the application occasion.

At present, a bearing manufacturer in China designs a certain experience on high-pressure high-temperature ceramic sealed angular contact ball bearings, but the bearing development in the high-pressure high-temperature field is severely restricted because the working condition temperature of a certain type of turbine radiator is set to be about 200 ℃, the limit rotating speed reaches 60000r/min, and the bearing pressure-bearing capacity and the anti-rust performance of a labyrinth rubber sealing structure cannot be met.

The conventional sealed angular contact ball bearing is generally composed of an inner ring, an outer ring, a retainer, a rolling body and a sealing ring. With the development of the aviation industry, the conventional labyrinth rubber seal bearing structure is not suitable for some special parts. Particularly in non-conventional locations such as control systems, regulation systems, etc.

Patent document No. CN202381547U discloses a lip type sealed bearing, which comprises a bearing outer ring and a bearing inner ring, a steel ball is arranged between the bearing outer ring and the bearing inner ring, a sealing cover is further arranged between the bearing outer ring and the bearing inner ring, three contact lips are arranged at the bottom of the sealing cover, and the contact tightness between the three contact lips and the bearing inner ring decreases progressively from inside to outside. The utility model discloses the reduction has strengthened the elasticity of sealing member to the tolerance of sealing member, has improved the sealing performance of bearing, can prevent effectively in the work that steam, dust, grass bits etc. from sneaking into inside the bearing, reduces the wearing and tearing of bearing, prolongs the working life of bearing. However, the axial dimension of the seal structure in the bearing is large, and it is difficult to ensure a good sealing effect by means of direct contact between the seal lip and the inner ring.

SUMMERY OF THE UTILITY MODEL

To the defect among the prior art, the utility model aims at providing an angular contact ball bearing with special combination seal structure.

According to the utility model provides an angular contact ball bearing with special combined sealing structure, including outer lane, inner circle, seal structure, ball and holder;

the outer ring and the inner ring are coaxially arranged, a roller path is formed between the outer ring and the inner ring, a plurality of balls and a retainer are arranged in the roller path, and sealing structures are arranged on two sides of the roller path;

the sealing structure comprises a sealing cover, a framework and a sealing ring, the framework is embedded in one surface, close to the ball, of the sealing ring, and the sealing cover is connected to the surface, far away from the ball, of the sealing ring.

Preferably, both ends of the inner side of the outer ring are provided with annular outer ring tooth grooves, and one end of the sealing ring close to the outer ring is embedded in the outer ring tooth grooves;

the outer ring tooth socket comprises an outer ring tooth socket groove bottom and an outer ring tooth socket slope, the outer ring tooth socket groove bottom is in clearance fit with the sealing ring, and the outer ring tooth socket slope is in interference fit with the sealing ring.

Preferably, the size of a gap between the groove bottom of the outer ring tooth groove and the sealing ring is not less than 0.1 mm.

Preferably, the interference size between the outer ring tooth socket slope and the sealing ring is not less than 0.1 mm.

Preferably, the cross section of the sealing cover is of an L-shaped structure, the sealing cover comprises a first sealing cover component and a second sealing cover component, the first sealing cover component is connected with one surface, away from the ball, of the sealing ring, and the second sealing cover component is located in a gap between the sealing ring and the inner ring;

the end, close to the inner ring, of the sealing ring is a sealing end, a main lip and an auxiliary lip are arranged on the sealing end, the main lip is connected with the second sealing cover assembly, and the auxiliary lip is connected with the first sealing cover assembly.

Preferably, the main lip extends from the connection point of the main lip and the sealing end to the direction close to the second sealing cover component and the first sealing cover component until the main lip is in interference connection with the second sealing cover component.

Preferably, the auxiliary lip extends from the connection point of the auxiliary lip and the sealing end to the direction close to the first sealing cover component and far away from the second sealing cover component until the auxiliary lip is in interference connection with the first sealing cover component.

Preferably, the sealing cover is in interference fit with the inner ring.

Preferably, the cage comprises a PEEK polymer material cage.

Preferably, the ball comprises a ball of ceramic material.

Compared with the prior art, the utility model discloses following beneficial effect has:

1. the utility model discloses simple structure, convenient operation has realized preventing that the friction is vice to receive the technological effect that pollutes or impurity got into the bearing for the bearing reliability is high, and is longe-lived.

2. The utility model discloses a sealed lid of L shape reaches the technical means of sealed effect with the sealing washer cooperation, does not need the special design seal receptacle to support the oil blanket, but inside through sealed lid embedding sealing washer, seal structure's axial and radial dimension all do not increase, have saved the space.

3. The utility model discloses a technical means that sealed lid is connected with vice lip interference to main lip for sealed effect is more reliable.

Drawings

Other features, objects and advantages of the invention will become more apparent upon reading of the detailed description of non-limiting embodiments with reference to the following drawings:

fig. 1 is a schematic structural view of the present invention;

fig. 2 is a schematic structural view of the middle sealing structure of the present invention;

fig. 3 is a schematic structural view of the sealing assembly of the present invention;

FIG. 4 is a schematic structural view of the tooth socket of the middle and outer ring of the present invention;

fig. 5 is a schematic structural view of the tooth socket of the inner ring of the present invention.

The figures show that:

outer ring 1 sealing ring 5

Inner ring 2 balls 6

Sealing cover 3 holder 7

Skeleton 4

Detailed Description

The present invention will be described in detail with reference to specific embodiments. The following examples will assist those skilled in the art in further understanding the present invention, but are not intended to limit the invention in any way. It should be noted that various changes and modifications can be made by one skilled in the art without departing from the spirit of the invention. These all belong to the protection scope of the present invention.

The utility model provides an angular contact ball bearing with a special combined sealing structure, which comprises an outer ring 1, an inner ring 2, a sealing structure, balls 6 and a retainer 7 as shown in figure 1; the outer ring 1 and the inner ring 2 are coaxially arranged, a roller path is formed between the outer ring 1 and the inner ring 2, a plurality of balls and the retainer 7 are arranged in the roller path, and sealing structures are arranged on two sides of the roller path; as shown in fig. 2, the sealing structure includes a sealing cover 3, a framework 4 and a sealing ring 5, the framework 4 is embedded on one surface of the sealing ring 5 close to the ball 6, and the sealing cover 3 is connected on one surface of the sealing ring 5 far from the ball 6.

Two ends of the inner side of the outer ring 1 are provided with annular outer ring tooth grooves, and one end of the sealing ring 5 close to the outer ring 1 is embedded in the outer ring tooth grooves; as shown in fig. 4, the outer ring tooth socket includes an outer ring tooth socket bottom and an outer ring tooth socket slope, the outer ring tooth socket bottom is in clearance fit with the sealing ring 5, and the outer ring tooth socket slope is in interference fit with the sealing ring 5. Preferably, the size of a gap between the bottom of the outer ring tooth socket groove and the sealing ring 5 is not less than 0.1 mm; and the interference size between the outer ring tooth socket slope and the sealing ring 5 is not less than 0.1 mm. This kind of cooperation connected mode makes 5 axial positioning of sealing washer, radial compression mode in outer lane alveolus, makes sealing washer 5 tightly locked in the outer lane alveolus, reaches good sealing washer fastness, guarantees promptly that outer lane 1 does not leak the fat, guarantees less assembly pressure again.

As shown in fig. 2, the cross section of the sealing cover 3 is an L-shaped structure, the sealing cover 3 includes a first sealing cover component and a second sealing cover component, the first sealing cover component connects one side of the sealing ring 5 away from the ball 6, and the second sealing cover component is located in the gap between the sealing ring 5 and the inner ring 2; the sealing cover 3 is additionally arranged on the outer side of the sealing ring 5, so that the impact of high-pressure airflow on the sealing ring 5 is reduced, and the problems of sealing and pressure bearing of the bearing are effectively solved.

As shown in fig. 3, one end of the sealing ring 5 close to the inner ring 2 is a sealing end, a main lip and an auxiliary lip are arranged on the sealing end, the main lip is connected with the second sealing cover assembly, and the auxiliary lip is connected with the first sealing cover assembly. The major lip has a smaller radial dimension than the minor lip.

The main lip extends to the direction close to the second sealing cover component and the first sealing cover component by taking the connection point of the main lip and the sealing end as a starting point until the main lip is in interference connection with the second sealing cover component; the auxiliary lip takes the connection point of the auxiliary lip and the sealing end as a starting point and extends to the direction close to the first sealing cover component and far away from the second sealing cover component until the auxiliary lip is in interference connection with the first sealing cover component.

The sealing cover 3 is in interference fit with the inner ring 2. The retainer 7 comprises a PEEK polymer material retainer 7. Said balls 6 comprise balls 6 of a ceramic material.

The utility model provides a bearing has still carried out aspects such as ditch camber, contact angle, light macromolecular material holder 7 and has optimized. Optimizing the curvature of the groove not only ensures that the rolling surfaces of the inner ring 2 and the outer ring 1 of the bearing and the ball 6 have better fitting degree, so that the bearing has good heat dissipation under high-speed operation and prevents abnormal temperature rise, but also considers the performance of ultrahigh rotating speed when the sealed angular contact ball bearing bears combined load in the radial direction and the axial direction simultaneously, so that the contact angle of the bearing is in a reasonable range by optimizing the contact angle, the retainer 7 adopts PEEK high polymer material, the material has small specific gravity, the centrifugal force of the high-speed bearing and the gyro moment have great influence on the performance of the bearing, the retainer 7 made of PEEK material has smaller centrifugal force compared with the retainer 7 made of metal material under the same working condition, and the PEEK has high strength in nonmetal material, large temperature tolerance range and good dynamic balance, and under the premise of meeting the requirements of design life and load, the diameter reduction and the increase of the ball number of the ball 6 are considered, to meet the higher rotational speed requirement. The diameter of the ball 6 is reduced to increase the thickness of the ring, so that the fatigue stress cycle number of the bearing is increased, the fatigue life of the bearing is prolonged, the number of the balls of the ball 6 is increased, the load of the bearing cannot be reduced when the diameter of the balls is reduced and the number of the balls is increased, and the optimization of the service life of the bearing is ensured.

In one embodiment of the utility model, two ends of the outer side of the inner ring 2 are both provided with annular inner ring tooth grooves, and an additional sealing structure is embedded in the inner ring tooth grooves to improve the sealing performance; as shown in fig. 5, the inner ring tooth socket includes an inner ring tooth socket bottom and an inner ring tooth socket slope, and the matching connection mode of the inner ring tooth socket bottom and the inner ring tooth socket slope and the additional sealing structure is the same as that of the outer ring tooth socket.

In an embodiment of the utility model, the sealing cover 3 adopts stainless steel material, and the sealing washer 5 adopts fluororubber material, and fluororubber has good high temperature resistance, and high temperature resistance reaches 240 ℃, has characteristics such as resistant oil, ageing-resistant, corrosion-resistant.

In order to meet the requirements of users on special installation positions, the structure of the bearing needs to be redesigned. The technical scheme of the high-pressure high-temperature ceramic sealed angular contact ball bearing for a certain type of turbine radiator is determined by researching the dimensional accuracy and analyzing the structural characteristics of the bearing of the same type of foreign products, based on the domestic experience of designing the high-pressure high-temperature ceramic sealed angular contact ball and according to the structural parameters and performance indexes of the bearing.

On the basis, the size and the number of steel balls of the bearing, the curvature coefficient of a ferrule groove, the initial clearance, the design contact angle and other parameters and the sealing ring of the bearing are further optimized by adopting software such as RomaxDSESIGNER R17 dynamic analysis and the like, and KFM material labyrinth sealing and dustproof reinforced stainless steel plate combined design and the like are adopted, so that the theoretical calculation service life is greatly prolonged compared with the bearing adopting a traditional design structure.

The utility model provides a certain type high pressure high temperature ceramic ball seals angular contact ball bearing's for turbo radiator technical bottleneck, improve the high temperature nature, the resistance to pressure and the reliability of this type of bearing. Provides a powerful foundation for the technical progress of high-pressure high-temperature ceramic ball bearings for domestic turbine radiators.

In the description of the present application, it is to be understood that the terms "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience in describing the present application and simplifying the description, but do not indicate or imply that the referred device or element must have a specific orientation, be constructed in a specific orientation, and be operated, and thus, should not be construed as limiting the present application.

The foregoing description of the specific embodiments of the invention has been presented. It is to be understood that the present invention is not limited to the specific embodiments described above, and that various changes or modifications may be made by those skilled in the art within the scope of the appended claims without departing from the spirit of the invention. The embodiments and features of the embodiments of the present application may be combined with each other arbitrarily without conflict.

Claims

1. An angular contact ball bearing with a special combined sealing structure is characterized by comprising an outer ring (1), an inner ring (2), a sealing structure, balls (6) and a retainer (7);

the outer ring (1) and the inner ring (2) are coaxially arranged, a raceway is formed between the outer ring (1) and the inner ring (2), a plurality of balls and the retainer (7) are arranged in the raceway, and sealing structures are arranged on two sides of the raceway;

the sealing structure comprises a sealing cover (3), a framework (4) and a sealing ring (5), wherein the framework (4) is embedded in one surface, close to the ball (6), of the sealing ring (5), and the sealing cover (3) is connected to one surface, far away from the ball (6), of the sealing ring (5).

2. The angular contact ball bearing with the special combined sealing structure according to claim 1, wherein both ends of the inner side of the outer ring (1) are provided with annular outer ring tooth grooves, and one end of the sealing ring (5) close to the outer ring (1) is embedded in the outer ring tooth grooves;

the outer ring tooth socket comprises an outer ring tooth socket groove bottom and an outer ring tooth socket slope, the outer ring tooth socket groove bottom is in clearance fit with the sealing ring (5), and the outer ring tooth socket slope is in interference fit with the sealing ring (5).

3. The angular contact ball bearing with the special combined sealing structure according to claim 2, wherein the size of the gap between the groove bottom of the outer ring tooth groove and the sealing ring (5) is not less than 0.1 mm.

4. Angular contact ball bearing with special combined sealing structure according to claim 2, characterized in that the interference dimension between the outer ring tooth socket slope and the sealing ring (5) is not less than 0.1 mm.

5. The angular contact ball bearing with the special combined sealing structure is characterized in that the cross section of the sealing cover (3) is of an L-shaped structure, the sealing cover (3) comprises a first sealing cover component and a second sealing cover component, the first sealing cover component is connected with one surface, away from the ball (6), of the sealing ring (5), and the second sealing cover component is positioned in a gap between the sealing ring (5) and the inner ring (2);

one end, close to the inner ring (2), of the sealing ring (5) is a sealing end, a main lip and an auxiliary lip are arranged on the sealing end, the main lip is connected with the second sealing cover assembly, and the auxiliary lip is connected with the first sealing cover assembly.

6. The angular contact ball bearing with the special combined sealing structure according to claim 5, wherein the main lip extends from a connection point of the main lip with the sealing end to a direction close to the second seal cover assembly and close to the first seal cover assembly until the main lip is in interference connection with the second seal cover assembly.

7. The angular contact ball bearing with the special combined sealing structure according to claim 5, wherein the secondary lip extends from a connection point of the secondary lip with the sealing end to a direction close to the first gland assembly and away from the second gland assembly until the secondary lip is in interference connection with the first gland assembly.

8. Angular contact ball bearing with special combined sealing structure according to claim 1, characterized in that the sealing cover (3) and the inner ring (2) are in interference fit.

9. Angular contact ball bearing with special composite sealing structure according to claim 1, characterized in that the cage (7) comprises a PEEK high molecular material cage (7).

10. Angular contact ball bearing with special combined sealing structure according to claim 1, characterized in, that the balls (6) comprise balls (6) of ceramic material.