CN113107980B

CN113107980B - Cylindrical roller bearing and retainer thereof

Info

Publication number: CN113107980B
Application number: CN202110512879.8A
Authority: CN
Inventors: 刘延斌; 桑得雨; 刘红彬; 杨海生; 郑学普; 邱明
Original assignee: Henan University of Science and Technology
Current assignee: Henan University of Science and Technology
Priority date: 2021-05-11
Filing date: 2021-05-11
Publication date: 2023-01-17
Anticipated expiration: 2041-05-11
Also published as: CN113107980A

Abstract

The invention relates to a cylindrical roller bearing and a retainer thereof, wherein the retainer comprises two support rings and a plurality of support beams uniformly distributed around the axes of the support rings, two ends of each support beam are fixedly connected with the support ring at the corresponding end and are fixedly connected with at least one support ring in a split manner, and any two adjacent support beams and two support rings form a roller mounting space; the pocket hole has all been seted up corresponding to each roller installation space on the opposite flank of two support rings, and pocket hole circumference is sealed, and the corresponding end adaptation that the pocket hole supplied the roller penetrates, and the pocket hole has the hole bottom that is used for fixing a position the axial position of roller. Can form complete annular oil film between roller both ends outer peripheral face and the pocket hole, be favorable to improving oil film thickness and the lubricating property between pocket hole and the roller, the pocket hole can form the confined force of omnidirectional to the roller in the radial plane of bearing, and then can effectively restrain the centrifugal motion of roller, guarantees to have sufficient contact force and drag power between roller and the inner circle, reduces skidding between roller and the inner circle.

Description

Cylindrical roller bearing and retainer thereof

Technical Field

The invention belongs to the technical field of bearings, and particularly relates to a cylindrical roller bearing and a retainer thereof.

Background

Cylindrical roller bearings are generally formed by an outer ring, an inner ring, a cage and rollers, the cage having pockets for retaining and guiding the rollers. Most of the pockets in the cylindrical roller bearing in the prior art are planar pockets (the planar pocket side walls are planar) as shown in the chinese invention patent application with the application publication No. CN110953248A, or semicircular pockets (the semicircular pocket side walls are cambered surfaces) as shown in the chinese utility model patent with the granted publication No. CN 211599273U.

No matter be plane pocket hole or semicircle pocket hole, be the partial contact guide to the roller, can't form the restraint of omnidirectional to the roller footpath, can't form complete annular oil film moreover between plane pocket hole, semicircle pocket hole and the roller, the oil film is thinner, and lubricating property is relatively poor.

When the conventional cylindrical roller bearing is applied to high-speed hosts such as an aircraft engine and the like, the phenomenon of bearing slipping (also called retainer slipping) is very easy to occur due to the fact that the use environment is high-speed and light-load environment, and the phenomenon of oil film breakage and abrasion aggravation between a roller and an inner ring raceway caused by the bearing slipping can further cause early failure of the bearing, so that the performance and the safety of the host are influenced.

Disclosure of Invention

The invention aims to provide a retainer of a cylindrical roller bearing, which aims to solve the technical problem that a roller is easy to slip due to a plane pocket or a semi-circle pocket in the prior art; the cylindrical roller bearing using the retainer is also provided to solve the technical problem.

In order to achieve the purpose, the technical scheme of the retainer of the cylindrical roller bearing provided by the invention is as follows: a cage of a cylindrical roller bearing, comprising:

two support rings are arranged at intervals along the axial direction of the support rings;

the supporting beams are uniformly distributed around the axis of the supporting rings, two ends of each supporting beam are fixedly connected with the corresponding supporting ring and are fixedly connected with at least one supporting ring in a split manner, and any two adjacent supporting beams and two supporting rings form a roller mounting space for mounting a roller;

two the pocket hole has all been seted up corresponding to each on the opposite flank of support ring roller installation space, pocket hole circumference is sealed, and the corresponding end adaptation that the pocket hole supplied the roller penetrates, the pocket hole has the hole bottom that is used for fixing a position the axial position of roller.

Has the beneficial effects that: pocket hole circumference is sealed, and the roller can the adaptation penetrate the pocket downthehole, during the use, can form complete annular oil film between roller both ends outer peripheral face and the pocket hole, be favorable to improving oil film thickness and the lubricating property between pocket hole and the roller, the pocket hole can form the confined force of omnidirectional to the roller in the radial plane of bearing simultaneously, and then can effectively restrain the centrifugal motion of roller, guarantee to have sufficient contact force and drag power between roller and the inner circle, reduce the skidding between roller and the inner circle. The axial positioning of the roller is realized by the complete contact between the bottom of the pocket hole and the end surface of the roller, the complete contact positioning mode can not generate the severe abrasion of the edge biting type, and the axial positioning precision retentivity of the roller is good.

Preferably, the support ring is provided with a communication channel for communicating the roller mounting space with the outside of the retainer, and the communication channel is used for lubricating medium and gas to pass through. Set up and to make things convenient for outside lubricated medium and gaseous to enter into roller installation space between the intercommunication passageway, lubricate the roller.

Preferably, the communicating passage is a communicating hole provided at the bottom of the pocket hole, the communicating hole is arranged coaxially with the pocket hole, and the inner diameter of the communicating hole is smaller than that of the pocket hole, so that an annular positioning surface for axially positioning the roller is formed at the bottom of the pocket hole. Set up the intercommunicating pore at the bottom of the hole of pocket and form the intercommunication passageway, simple structure, annular locating surface can carry out the complete contact with the roller terminal surface and carry out axial positioning to the roller, and the axial positioning accuracy retentivity of roller is good.

Preferably, the retainer further comprises a rivet penetrating through the two support rings and the support beam to fixedly assemble the support rings and the support beam together.

The technical scheme of the cylindrical roller bearing is as follows: a cylindrical roller bearing comprising an inner ring, an outer ring and a cage located between the inner ring and the outer ring, the cage comprising:

the supporting beams are uniformly distributed around the axis of the supporting rings, two ends of each supporting beam are fixedly connected with the corresponding supporting ring and are fixedly connected with at least one supporting ring in a split manner, and rollers are arranged between any two adjacent supporting beams and two supporting rings;

the opposite side surfaces of the two support rings are provided with pockets corresponding to the rollers, the pockets are circumferentially closed, the corresponding ends of the rollers are matched and penetrate into the corresponding pockets, and the pockets are provided with hole bottoms for positioning the axial positions of the rollers;

in the axial direction of the cylindrical roller bearing, the inner ring and the outer ring are arranged between the two support rings in a fitting manner.

Has the advantages that: pocket hole circumference is sealed, and the roller can the adaptation penetrate the pocket downthehole, during the use, can form complete annular oil film between roller both ends outer peripheral face and the pocket hole, be favorable to improving oil film thickness and the lubricating property between pocket hole and the roller, the pocket hole can form the confined force of omnidirectional to the roller in the radial plane of bearing simultaneously, and then can effectively restrain the centrifugal motion of roller, guarantee to have sufficient contact force and drag power between roller and the inner circle, reduce the skidding between roller and the inner circle. The axial positioning of the roller is realized by the complete contact of the annular side surfaces of the inner ring and the outer ring and the annular side surface of the retainer support ring and the complete contact of the bottom of the pocket hole and the end surface of the roller, the complete contact positioning mode can not generate edge biting type severe abrasion, and the axial positioning precision retentivity of the roller is good.

Preferably, the support ring is provided with a communication channel for communicating the roller with the outside of the retainer, and the communication channel is used for lubricating medium and gas to pass through. The communicated channel is arranged, so that external lubricating media and gas can enter the roller conveniently, and the roller is lubricated.

Preferably, a lubrication gap is provided between the end surface of the roller and the bottom of the pocket, and between the outer circumferential surface of the roller and the wall of the pocket.

Preferably, lubricating gaps are arranged between the retainer and the side faces of the outer ring and the inner ring.

Drawings

Fig. 1 is a perspective view of a cylindrical roller bearing embodiment 1 of the present invention;

FIG. 2 is a radial sectional view of a cylindrical roller bearing according to embodiment 1 of the present invention;

FIG. 3 is an axial sectional view of a cylindrical roller bearing according to embodiment 1 of the present invention;

FIG. 4 is a schematic view showing a fitting relationship between pockets and rollers in embodiment 1 of the cylindrical roller bearing of the present invention;

FIG. 5 is a schematic view of a cage in embodiment 1 of the cylindrical roller bearing of the present invention;

fig. 6 is a radial sectional view of a cage in embodiment 1 of the cylindrical roller bearing of the present invention;

FIG. 7 isbase:Sub>A schematic view of section A-A of FIG. 6;

FIG. 8 is a schematic view of section B-B of FIG. 6;

FIG. 9 is a schematic view of a second support ring of the cage in embodiment 1 of the cylindrical roller bearing;

description of reference numerals:

100. an inner ring; 200. an outer ring; 300. a cage; 301. a first support ring; 302. a second support ring; 303. a support beam; 304. a roller mounting space; 305. riveting; 306. a pocket hole; 307. a communicating hole; 308. an annular positioning surface; 400. a roller.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the detailed description and specific examples, while indicating the preferred embodiment of the invention, are intended for purposes of illustration only and are not intended to limit the scope of the invention. The components of embodiments of the present invention generally described and illustrated in the figures herein may be arranged and designed in a wide variety of different configurations.

Thus, the following detailed description of the embodiments of the present invention, presented in the figures, is not intended to limit the scope of the invention, as claimed, but is merely representative of selected embodiments of the invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments of the present invention without making any creative effort, shall fall within the protection scope of the present invention.

It is noted that relational terms such as "first" and "second," and the like, may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising one of 8230 \8230;" does not exclude processes, methods comprising said element.

In the description of the present invention, unless otherwise expressly specified or limited, the terms "mounted," "connected," and "connected" when they are used are to be construed broadly, e.g., as meaning a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; either directly or indirectly through intervening media, or may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood by those skilled in the art from specific situations.

In the description of the present invention, it should be noted that, unless explicitly stated or limited otherwise, the term "provided" may be used in a broad sense, for example, the object provided may be a part of the body, or may be arranged separately from the body and connected to the body, and the connection may be detachable or non-detachable. The specific meaning of the above terms in the present invention can be understood by those skilled in the art from specific situations.

The present invention is described in further detail below with reference to examples.

The specific embodiment 1 of the cylindrical roller bearing provided by the invention:

as shown in fig. 1 to 9, the cylindrical roller bearing includes an inner ring 100, an outer ring 200, a cage 300, and rollers 400, and the cage 300 is configured as shown in fig. 5 to 9.

The holder 300 includes a first support ring 301 and a second support ring 302, the first support ring 301 and the second support ring 302 have the same structure, and the first support ring 301 and the second support ring 302 are arranged at intervals along the axial direction of the holder 300 (also the axial direction of the support rings). The retainer 300 further comprises a plurality of support beams 303, the plurality of support beams 303 are uniformly distributed around the axes of the first support ring 301 and the second support ring 302, two ends of each support beam 303 are fixedly connected with the first support ring 301 and the second support ring 302 respectively, so that a rigid frame body is formed, any two adjacent support beams 303 and the first support ring 301 and the second support ring 302 form a roller mounting space 304 together, and the rollers 400 are mounted in the roller mounting space 304.

The support beam 303 is a block-shaped structure, rivet holes (not shown) are formed in the first support ring 301, the second support ring 302, and the support beam 303, and rivets 305 are inserted into the rivet holes to fix the first support ring 301, the second support ring 302, and the support beam 303 together. In order to ensure the overall strength of the first support ring 301, the second support ring 302, and the support beam 303, each support beam 303 is fixed with two rivets 305 as shown in fig. 5 and 6.

As shown in fig. 6, 7 and 8, since the first support ring 301 and the second support ring 302 have the same structure, only one of them will be described here as an example. A plurality of pockets 306 have been seted up on the side of first support ring 301 towards second support ring 302, and pocket 306 extends along the axial of second support ring 302, and a plurality of pockets 306 are along first support ring 301's circumference equipartition. The pocket 306 in this embodiment is a circumferentially closed hole with a diameter that is adapted to the outer diameter of the roller 400, where adaptation refers to a size that is substantially the same but still has a lubrication clearance that does not affect the rotation of the roller 400, and can form an omnidirectional restraining force on the roller 400 in the axial and radial planes. When the roller 400 rotates, a complete annular oil film can be formed between the roller 400 and the pocket 306, and the thickness and the lubricating performance of the oil film between the pocket 306 and the outer peripheral surface of the roller 400 are improved.

As shown in fig. 7, the pocket 306 does not completely axially extend through the first support ring 301, the pocket 306 is a blind hole, and the bottom of the pocket 306 is capable of axially locating the roller 400. The communicating hole 307 is formed in the bottom of the pocket 306, and the communicating hole 307 communicates the outside of the cage 300 and the roller 400, so that lubricating oil and gas can enter the roller 400, and the lubricating performance of the roller 400 is ensured. The communication hole 307 and the pocket 306 together form an annular locating surface 308 at the bottom of the pocket 306, the annular locating surfaces 308 on the first and second support rings 301, 302 being able to cooperate to axially locate the roller 400.

During assembly, the rollers 400 are first installed in the pockets 306 of the first and second support rings 301, 302, and then the first and second support rings 301, 302 and the support beams 303 are fixedly assembled together. After the assembly is completed, the two ends of the roller 400 are radially and omnidirectionally constrained by the pockets 306 on the first support ring 301 and the second support ring 302, and a complete annular oil film is formed between the two ends of the roller 400 and the pockets 306, so that the centrifugal motion of the roller 400 is effectively inhibited, sufficient contact force and supporting force are ensured between the roller 400 and the raceway of the inner ring 100, and the slip between the roller 400 and the raceway of the inner ring 100 is reduced. Meanwhile, the inner ring 100 and the outer ring 200 can be fittingly placed between the first support ring 301 and the second support ring 302, the annular side surfaces of the inner ring 100 and the outer ring 200 can be in complete contact with the annular side surfaces of the retainer support rings (including the first support ring 301 and the second support ring 302) to realize axial positioning of the retainer 300, the annular positioning surfaces 308 of the first support ring 301 and the second support ring 302 of the retainer 300 can be in complete contact with the end surfaces of the rollers 400 to realize axial positioning of the rollers 400, and the annular side surfaces of the inner ring 100 and the outer ring 200 and the annular positioning surfaces 308 of the pockets 306 have large areas, so that the phenomenon of edge biting type severe abrasion is not easy to occur, the axial positioning accuracy of the rollers 400 can be further ensured, and the stable rotation of the whole rollers 400 can be ensured.

In the embodiment, as shown in fig. 4, during actual machining, a lubrication gap c between the pocket 306 and the outer circumferential surface of the roller 400 is 0.1-0.2mm, a lubrication gap 0.2mm is left between the side surface of the support ring (including the first support ring 301 and the second support ring 302) and the side surfaces of the outer ring 200 and the inner ring 100, and a lubrication gap 0.2mm is left between the annular limiting surface 308 and the end surface of the roller 400.

In order to verify the expected effect of the cylindrical roller bearing, the common semicircular pocket roller bearing, the common straight-face pocket outer ring guide roller bearing and the cylindrical roller bearing with the same specification are taken as objects, the rotating speed of an inner ring is 20000r/min, the radial load of the inner ring is 1000N, the outer ring is fixed, the ADAMS simulation software is used for carrying out comparative simulation on the slip ratio of the retainer on the three bearings, and the simulation result shows that: the average slip ratio of the retainer of the common semi-circle pocket roller bearing is 9.6%, the average slip ratio of the retainer of the common straight-face pocket outer ring guide roller bearing is 13.4%, and the average slip ratio of the retainer of the cylindrical roller bearing is 4.1%, which shows that the cylindrical roller bearing has more excellent anti-slip capability.

The communication hole 307 forms a communication passage for communicating the roller mounting space 304 with the outside of the cage 300, and the communication passage allows a lubricant (e.g., lubricant, grease) and gas to enter the roller mounting space 304 to lubricate the roller 400.

Embodiment 2 of the cylindrical roller bearing of the present invention:

in embodiment 1, the first support ring, the second support ring, and the support beams are all in a split structure, and each support beam is fixed between the first support ring and the second support ring by two rivets. In this embodiment, each support beam may correspond to only one rivet. In other embodiments, the rivet may be a unitary structure with one of the first support ring and the second support ring and separate from the other. In other embodiments, the support beam may be integrally formed with one of the first support ring and the second support ring and separately secured to the other support ring. In addition, when the support beam, the first support ring and the second support ring are specifically assembled, the fixing manner may be changed, for example, welding or the like may be performed.

Embodiment 3 of the cylindrical roller bearing of the present invention:

in example 1, the communicating passage is a communicating hole provided at the bottom of the pocket hole, and the communicating hole forms an annular locating surface together with the pocket hole. In this embodiment, the arrangement position of the communication passage is changed, the communication passage penetrates through the support ring in the axial direction of the holder, but the communication passage and the pockets are sequentially arranged in the circumferential direction or the radial direction of the holder.

Embodiment 4 of the cylindrical roller bearing of the present invention:

in example 1, the support beam has a block structure. In this embodiment, the support beam may be a frame structure for weight reduction.

Embodiment 5 of the cylindrical roller bearing of the present invention:

in this embodiment, the size of each lubrication gap can be adaptively changed and adjusted according to the specification of the bearing and the use environment.

The specific embodiment of the retainer of the cylindrical roller bearing of the invention comprises the following steps:

the structure of the retainer of the cylindrical roller bearing is the same as that of the retainer in the above-mentioned embodiment of the cylindrical roller bearing, and the details are not repeated herein.

Finally, it should be noted that the above-mentioned embodiments are only preferred embodiments of the present invention, and not intended to limit the present invention, and although the present invention has been described in detail with reference to the foregoing embodiments, it will be apparent to those skilled in the art that modifications may be made to the technical solutions described in the foregoing embodiments without inventive effort, or that some technical features may be substituted equally. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A retainer of a cylindrical roller bearing, characterized in that: the method comprises the following steps:

a plurality of support beams (303) are uniformly distributed around the axis of the support rings, two ends of each support beam (303) are fixedly connected with the support ring at the corresponding end and are fixedly connected with at least one support ring in a split manner, and any two adjacent support beams (303) and two support rings form a roller mounting space (304) for mounting a roller (400);

the opposite side surfaces of the two support rings are provided with a pocket (306) corresponding to each roller mounting space (304), the pockets (306) are circumferentially closed, the pockets (306) are used for corresponding ends of the rollers (400) to be matched and penetrated, and the pockets (306) are provided with hole bottoms for positioning the axial positions of the rollers (400);

the axial distance between the two support rings satisfies that lubricating gaps are formed between the retainer (300) and the side faces of the outer ring (200) and the inner ring (100).

2. The cage of a cylindrical roller bearing according to claim 1, characterized in that: and a communication channel for communicating the roller mounting space (304) with the outside of the retainer (300) is arranged on the support ring, and the communication channel is used for lubricating media and gas to pass through.

3. The cage of a cylindrical roller bearing according to claim 2, characterized in that: the communication channel is a communication hole (307) arranged at the bottom of the pocket (306), the communication hole (307) is arranged coaxially with the pocket (306), and the inner diameter of the communication hole (307) is smaller than that of the pocket (306), so that an annular positioning surface (308) for axially positioning the roller (400) is formed at the bottom of the pocket (306).

4. The cage of cylindrical roller bearing according to claim 1, 2 or 3, characterized in that: the retainer (300) further comprises rivets (305), and the rivets (305) penetrate through the two support rings and the support beam (303) to fixedly assemble the support rings and the support beam (303) together.

5. A cylindrical roller bearing, includes inner circle (100), outer lane (200) and is located cage (300) between inner circle (100), outer lane (200), its characterized in that: the cage (300) comprises:

the supporting beams (303) are uniformly distributed around the axis of the supporting rings, two ends of each supporting beam (303) are fixedly connected with the supporting rings at the corresponding ends and are fixedly connected with at least one supporting ring in a split manner, and rollers (400) are arranged between any two adjacent supporting beams (303) and two supporting rings;

pockets (306) are formed in the opposite side faces of the two support rings corresponding to the rollers (400), the pockets (306) are circumferentially closed, the corresponding ends of the rollers (400) are adapted to penetrate into the corresponding pockets (306), and the pockets (306) have hole bottoms for positioning the axial positions of the rollers (400);

in the axial direction of the cylindrical roller bearing, the inner ring (100) and the outer ring (200) are arranged between two support rings in a fitting manner

And lubricating gaps are formed among the retainer (300), the side surfaces of the outer ring (200) and the inner ring (100).

6. Cylindrical roller bearing according to claim 5, characterized in that: and the support ring is provided with a communication channel for communicating the roller (400) with the outside of the retainer (300), and the communication channel is used for lubricating medium and gas to pass through.

7. Cylindrical roller bearing according to claim 6, characterized in that: the communication channel is a communication hole (307) arranged at the bottom of the pocket (306), the communication hole (307) is arranged coaxially with the pocket (306), and the inner diameter of the communication hole (307) is smaller than that of the pocket (306), so that an annular positioning surface (308) for axially positioning the roller (400) is formed at the bottom of the pocket (306).

8. Cylindrical roller bearing according to claim 5 or 6 or 7, characterized in that: the retainer (300) further comprises rivets (305), and the rivets (305) penetrate through the two support rings and the support beam (303) to fixedly assemble the support rings and the support beam (303) together.

9. Cylindrical roller bearing according to claim 5 or 6 or 7, characterized in that: lubrication gaps are formed between the end face of the roller (400) and the bottom of the pocket (306), and between the outer peripheral surface of the roller (400) and the wall of the pocket (306).