CN113623315A

CN113623315A - Conical rolling bearing

Info

Publication number: CN113623315A
Application number: CN202110831265.6A
Authority: CN
Inventors: 刘世亮; 徐华胜; 崔明广; 安少刚; 袁绪尧; 龚文波; 雷鸣浩
Original assignee: Zhongzhe High Speed Railway Bearing Co ltd
Current assignee: Zhongzhe High Speed Railway Bearing Co ltd
Priority date: 2021-07-22
Filing date: 2021-07-22
Publication date: 2021-11-09

Abstract

The invention relates to a conical rolling bearing, wherein the outer ring of the bearing is provided with a flange which is positioned on the small end surface of the outer ring, the inner ring is not provided with a large flange and a small flange, a row of a plurality of rolling bodies and copper alloy solid retainers which are uniformly distributed along the radial direction are arranged between the outer ring and the inner ring, and the flange of the outer ring is contacted with the spherical base surface of the rolling bodies. The invention has the advantages of high rotating speed, low noise, low vibration and long service life, and because the flange is designed at the small end surface of the outer ring, the bearing can bear axial force, and the leakage of lubricating oil is well blocked, thereby ensuring the normal lubrication of the bearing.

Description

Conical rolling bearing

Technical Field

The invention relates to a conical rolling bearing. In particular, the present invention relates to a split bearing with a flange and a retainer.

Background

The tapered roller bearing has a conical inner ring raceway and an outer ring raceway, and tapered rollers are arranged between the conical inner ring raceway and the outer ring raceway, and the design mainly bears radial and axial combined loads mainly taking a radial direction as a main load. The outer ring raceway of the tapered roller bearing is provided with an included angle alpha along the axial direction, the axial load capacity of the bearing is mostly determined by a contact angle alpha, and the larger the alpha angle is, the higher the axial load capacity is.

Tapered roller bearings are divided into single-row, double-row and four-row tapered roller bearings according to the number of rows of rolling elements in the bearing. The single-row tapered roller bearing is provided with an outer ring, an inner ring assembly formed by wrapping an inner ring and a group of tapered rollers by a retainer, the outer ring is separated from the inner ring assembly, the taper angle of a raceway of the outer ring is 10-19 degrees, the joint action of axial load and radial load can be borne simultaneously, and the play can be adjusted in the installation processGapThe size of (2). The outer ring (or the inner ring) of the double-row tapered roller bearing is a whole, the small end faces of the two inner rings (or the outer rings) are close, a space ring is arranged in the middle, the clearance is adjusted by the thickness of the space ring, and the pre-interference of the double-row tapered roller bearing can also be adjusted by the thickness of the space ring. The performance of the four-row tapered roller bearing is basically the same as that of a double-row tapered roller bearing, but the four-row tapered roller bearing bears larger radial load and lower limit rotating speed than the double-row tapered roller bearing, and is mainly used for heavy machinery.

Generally, a tapered roller bearing structure is composed of an outer ring, an inner ring, tapered rollers and a retainer, the retainer is a stamped retainer (as shown in fig. 2) or a strut retainer (as shown in fig. 3), the outer ring has no flange, the inner ring is a double-flange structure, and axial load of the inner ring is borne by the flange of the inner ring, so that the tapered roller bearing structure is widely applied to various mechanical devices such as automobiles, gear boxes, metallurgical rolling mills, engineering machinery, mining machinery, plastic machinery, paper making machinery and the like. The rolling body with the structure has large impact on the end face of the flange of the bearing, causes noise due to vibration, cannot prevent lubricating oil from leaking, and cannot ensure the lubrication of the bearing.

In patent No. ZL2012202349102 entitled "double-row tapered roller bearing with stop flange on outer ring", a tapered roller bearing comprising a bearing outer ring, a bearing inner ring, tapered rollers and a retainer is designed, wherein the number of the tapered rollers is two rows of rollers, the outer ring is provided with the stop flange which is positioned on the outer side of the outer ring and has no contact surface with the tapered rollers, and the outer part of the inner ring is provided with a spacer ring.

In a patent number ZL20182202465.7 entitled tapered roller bearing with an outer ring provided with flanges, the tapered roller bearing comprises an outer ring, a retainer, an inner ring and rollers, wherein the retainer is arranged between the outer ring and the inner ring, and the rollers are arranged in the retainer; an outer ring flange is arranged at the position, close to the small end of the roller, of the outer ring, the outer ring flange is detachably arranged on the outer ring, and the outer ring flange and the outer ring adopt a locking ring and semi-embedded positioning mode; one side of the inner ring close to the large end of the roller is provided with a large flange, and one side of the inner ring close to the small end of the roller is provided with a small flange; the outer diameter of the inner ring is provided with a groove for mounting a small flange, the section of one side of the small flange, which is close to the tapered roller, is angular, one side of the angular is vertically arranged and matched with the groove, and the other side of the angular is obliquely arranged and matched with the end surface of the tapered roller. The tapered roller bearing mainly solves the problem that the tapered roller bearing needs to be fixed in a bearing shell when in use, and under the action of radial and axial combined loads, the tapered roller bearing can easily move axially in the bearing shell, so that the service lives of the bearing and the bearing shell are influenced, and the tapered roller bearing capable of bearing larger axial force is designed.

However, the end face of the rolling element of the tapered roller bearing with the structure still has large impact on the end face of the flange of the bearing, and for working conditions with special application requirements, such as the output end bearing of the gearbox for a railway, the working conditions of the tapered roller bearing have the characteristics of high rotating speed, high-frequency vibration, long service life, long maintenance-free period and easiness in installation and disassembly.

Disclosure of Invention

The invention aims to provide a conical rolling bearing which is suitable for bearing working conditions of high rotating speed, high-frequency vibration, long service life, long maintenance-free period and easy installation and disassembly.

The technical scheme adopted by the invention is as follows: a conical roller bearing is characterized in that: the rolling bearing comprises an outer ring (01), an inner ring (02), a plurality of rolling bodies (04) and a retainer (07), wherein the outer ring (01) is provided with a flange, the flange is positioned on the small end face of the outer ring (01), the inner ring (02) is not provided with a large flange and a small flange, a row of the rolling bodies (03) and the retainer (07) which are uniformly distributed along the radial direction are arranged between the outer ring (01) and the inner ring (02), and the flange of the outer ring (01) is contacted with the ball base surface of the rolling bodies (04).

The conical rolling bearing is characterized in that the retainer (07) is a copper alloy solid retainer.

The conical rolling bearing is characterized in that the inner ring (02) guides the retainer (07) to stably rotate.

The conical rolling bearing is characterized in that the size of the inner diameter of the retainer (07) is close to the size of an inner ring (02) matched with the retainer.

The present invention has the following advantageous effects.

1. The structure is an outer ring (01) structure with a flange, and has the advantage of high rotating speed.

2. The retainer (07) adopts the integral design of aluminum bronze, so that the lubricating property and the durability of the bearing are improved

Grindability.

3. The structure is an inner ring (02) guide retainer (07) structure, and prevents a large amount of lubricating oil

The stirring heat in the bearing caused by entering the bearing is stable in rotation under the working condition of high-speed operation, and the stirring heat-generating bearing has the characteristics of low noise, low vibration and long service life.

4. When the bearing rotates at a high speed, lubricating oil is thrown to the raceway of the outer ring (01) due to centrifugal force, and the raceway of the outer ring (01) has an included angle alpha (shown in figure 1) along the axial direction, so that the lubricating oil slides along the raceway and leaks out.

5. When the inner ring (02) and the shaft move along the axial direction, the flange is changed on the outer ring (01) so as to reduce the impact of the large end surface of the rolling body (04) on the bearing flange in the conventional design.

Drawings

Fig. 1 is a schematic view of a tapered roller bearing structure of the present invention.

Fig. 2 is a schematic view of a prior art tapered roller bearing of a stamped cage construction.

FIG. 3 is a schematic view of a tapered roller bearing of a prior art strut cage construction.

Fig. 4 is a table of inspection data of the tapered roller of the present invention.

The numbers in the figure indicate: outer ring 01, inner ring 02, rolling elements 04, cage 07, cage first piece 06, cage second piece 16, and struts 09.

Detailed Description

The present invention will be further described with reference to the accompanying drawings, in which it is understood that the embodiments described are only some embodiments of the invention, and not all embodiments; all other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

One, embodiment.

Referring to fig. 1 to 3, D in fig. 1 is a guide type, i.e., a cage, which is guided by an inner ring (02)

(07) The inner diameter of the bearing is closer to the size of the inner ring (02) matched with the inner diameter of the bearing to accord with the position of a guide condition in the bearing, and the position C is a flange of the outer ring (01). Flanges are arranged at the positions A and B in the figures 2 and 3.

As shown in figure 1, the conical rolling bearing comprises an outer ring (01), an inner ring (02), a plurality of rolling bodies (04) and a copper alloy solid retainer (07), wherein the outer ring (01) is provided with a flange which is positioned on the small end surface of the outer ring (01), the inner ring (02) is not provided with a large flange and a small flange, a row of the plurality of rolling bodies (03) and the copper alloy solid retainer (07) which are uniformly distributed along the radial direction are arranged between the outer ring (01) and the inner ring (02), and the flange of the outer ring (01) is in contact with the spherical base surface of the rolling bodies (04); the inner ring (02) guides the copper alloy solid retainer (07) to rotate stably, and the inner diameter size of the copper alloy solid retainer (07) is close to the size of the inner ring (02) matched with the copper alloy solid retainer.

In the above, the conical rolling bearing has the advantages that the outer ring (01) is provided with the flange structure, so that the conical rolling bearing has the advantage of high rotating speed; secondly, the retainer (07) adopts the integral design of copper alloy, so that the lubricating property and the wear resistance of the bearing are improved; thirdly, the structure is an inner ring (02) guide retainer (07) structure, prevents the stirring and heating inside the bearing caused by the fact that a large amount of lubricating oil enters the inside of the bearing, is stable in rotation under the working condition of high-speed operation, and has the characteristics of low noise, low vibration and long service life. Fourthly, when the bearing rotates at a high speed, lubricating oil is thrown to the raceway of the outer ring (01) due to centrifugal force, and the raceway of the outer ring (01) axially forms an included angle alpha (shown in figure 1), so that the lubricating oil slides along the raceway and leaks out, and at the moment, because the small end face of the outer ring (01) is provided with the flange, the bearing can bear axial force, the leakage of the lubricating oil is well prevented, and the normal lubrication of the bearing is ensured. Fifthly, when the inner ring (02) and the shaft move along the axial direction, the flange is changed on the outer ring (01) so as to reduce the impact of the end face of the big end of the roller on the flange of the bearing in the conventional design.

And II, detecting.

The conical rolling bearing manufactured by the technical scheme has the technical parameter indexes (such as a list shown in figure 4) meeting the requirements through experimental detection, and has good performance.

Claims

1. A conical roller bearing is characterized in that: the rolling bearing comprises an outer ring (01), an inner ring (02), a plurality of rolling bodies (04) and a retainer (07), wherein the outer ring (01) is provided with a flange, the flange is positioned on the small end face of the outer ring (01), the inner ring (02) is not provided with a large flange and a small flange, a row of the rolling bodies (03) and the retainer (07) which are uniformly distributed along the radial direction are arranged between the outer ring (01) and the inner ring (02), and the flange of the outer ring (01) is contacted with the ball base surface of the rolling bodies (04).

2. The conical rolling bearing is characterized in that the retainer (07) is a copper alloy solid retainer.

3. The conical rolling bearing is characterized in that the inner ring (02) guides the retainer (07) to stably rotate.

4. The conical rolling bearing is characterized in that the size of the inner diameter of the retainer (07) is close to the size of an inner ring (02) matched with the retainer.