CN211202610U

CN211202610U - High-bearing long-life double-row tapered roller bearing

Info

Publication number: CN211202610U
Application number: CN201922228390.9U
Authority: CN
Inventors: 王起君; 尹红贤; 吴林; 王金军; 李辉
Original assignee: Shenyang Zhongye Guangyang Bearing Co ltd
Current assignee: Shenyang Zhongye Guangyang Bearing Co ltd
Priority date: 2019-12-12
Filing date: 2019-12-12
Publication date: 2020-08-07
Anticipated expiration: 2029-12-12

Abstract

The utility model relates to a bearing field, high double-row tapered roller bearing who bears long-life, wherein the roller has two, and two rows of rollers are installed respectively between two inner circles and outer lane, interior ring setting is between two inner circles and separates two inner circles, the roller is tapered roller, the outer anchor ring of roller is including being located the external first section in middle part, be the second section between first section and the little terminal surface of roller, be the third section between first section and the big terminal surface of roller, the transition department of second section and the little terminal surface of roller second section and first end transition department, the transition department of first section and third section and the transition department of third section and the big terminal surface of roller are the circular arc transition, just the curvature radius of transition department is R6300 mm ~ 6700 mm. The bearing has the characteristics of high bearing capacity and long service life.

Description

High-bearing long-life double-row tapered roller bearing

Technical Field

The utility model relates to a bearing field, especially double-row tapered roller bearing.

Background

The tapered roller bearing is a radial thrust type rolling bearing in which the rolling elements are tapered rollers. The double-row tapered roller bearing is generally used on mining equipment or rolling mill equipment, and the two kinds of equipment both need characteristics such as high bearing capacity of inner part bearing, long-life. The bearing capacity of the prior double-row tapered roller bearing is weak due to the roller structure and the inner ring structure of the prior double-row tapered roller bearing, and the service life of the bearing is short under a high-load state for a long time.

SUMMERY OF THE UTILITY MODEL

In order to solve the above problem, the utility model provides a high double-row tapered roller bearing who bears long-life, it has the high characteristics of bearing, long-life.

In order to achieve the above object, the utility model adopts the following technical scheme:

high double-row tapered roller bearing who bears long-life, its characterized in that: the roller bearing comprises two inner rings, two outer rings, an inner ring spacer, two rows of rollers and a retainer, wherein the two rows of rollers are respectively arranged between the two inner rings and the two outer rings, the inner ring spacer is arranged between the two inner rings and separates the two inner rings, the rollers are tapered rollers, the outer ring surface of each roller comprises a first section externally arranged in the middle, a second section is arranged between the first section and the small end surface of each roller, a third section is arranged between the first section and the large end surface of each roller, the transition position between the second section and the small end surface of each roller, the transition position between the second section and the first end, the transition position between the first section and the third section and the transition position between the third section and the large end surface of each roller are in circular arc transition, and the curvature radius of the transition position is 6300-6700 mm; the first section, the second section and the third section in the outer ring surface of the roller are all convex arc surfaces;

the axial lengths of the second section and the third section are the same, the ratio of the axial lengths of the second section and the third section to the axial length of the outer ring surface of the roller is 3: 25-3: 20, the first section, the second section and the third section in the outer ring surface of the roller all meet the radian of a logarithmic curve, and the raceways of the inner ring and the outer ring are all arc surfaces which are concave outwards.

Preferably, the large end face of the roller faces the end of the bearing and the small end face of the roller faces the interior of the bearing, the large end face of the roller having a recess, the maximum depth of the recess being 2 mm.

Preferably, a plurality of oil injection holes are formed in the inner spacer ring.

Preferably, the inner ring surface of the outer ring is provided with two raceways, and the two raceways form a V-shaped structure.

Preferably, the outer circumferential surface of the inner ring is provided with a groove, and the roller is mounted in the groove.

Preferably, the transition between the bottom and the side wall of the groove has an inwardly concave cut groove, and the cut groove can be used as an oil storage groove.

Use the utility model discloses a beneficial effect is:

this double-row roller bearing sets up two inner circles and interior retainer through optimizing bearing structure for bearing structure is stable, can bear higher load. The roller is prevented from bursting through the arrangement of the inner spacer ring, and the loading capacity of the roller is stronger. The bearing is mainly optimized in the shape of the outer ring surface of the roller and the special shape and size of the transition part, and the roller is used for matching the inner ring raceway and the outer ring raceway and is slightly convex, so that the parts of the bearing are better contacted and the stress is dispersed in the using process, and the bearing load is improved.

Drawings

Fig. 1 is the structure schematic diagram of the double-row tapered roller bearing with high bearing capacity and long service life of the utility model.

Fig. 2 is the utility model discloses high bearing long-life double-row tapered roller bearing medium roller structure schematic diagram.

Fig. 3 is the logarithmic bus-bar diagram of the roller in the double-row tapered roller bearing with high bearing capacity and long service life.

The reference numerals include:

1-inner ring, 2-outer ring, 3-inner spacer ring, 4-roller, 41-first section, 42-second section, 43-third section, 44-transition position, 45-recess, 5-retainer and 6-oil hole.

Detailed Description

In order to make the purpose, technical solution and advantages of the present technical solution more clear, the present technical solution is further described in detail below with reference to specific embodiments. It should be understood that the description is intended to be exemplary only, and is not intended to limit the scope of the present teachings.

As shown in fig. 1 and fig. 2, the double-row tapered roller bearing with high load-bearing capacity and long service life proposed by the present embodiment includes two inner rings 1, an outer ring 2, an inner spacer 3, rollers 4 and a retainer 5, the two rows of rollers 4 are respectively arranged between the two inner rings 1 and the outer ring 2, the inner ring 3 is arranged between the two inner rings 1 and separates the two inner rings 1, the rollers 4 are tapered rollers 4, the outer ring surface of each roller 4 comprises a first section 41 externally arranged in the middle, a second section 42 is arranged between the first section 41 and the small end surface of each roller 4, a third section 43 is arranged between the first section 41 and the large end surface of each roller 4, a transition part 44 between the second section 42 and the small end surface of each roller 4, a transition part 44 between the second section 42 and the first end, a transition part 44 between the first section 41 and the third section 43 and a transition part 44 between the third section 43 and the large end surface of each roller 4 are in arc transition, and the curvature radius of the transition part 44 is R6300 mm-6700 mm.

Preferably, the axial lengths of the second and

third segments

42, 43 are the same, and the ratio of the axial lengths of the second and

third segments

42, 43 to the axial length of the outer circumferential surface of the roller 4 is between 3: 25 and 3: 20.

The large end face of the roller 4 faces the end of the bearing and the small end face of the roller 4 faces the interior of the bearing, the large end face of the roller 4 having a pocket 45, the pocket 45 being of maximum depth 2 mm.

The first, second and

third segments

41, 42, 43 of the outer circumferential surface of the roller 4 are all arc surfaces that are convex.

The first, second and

third segments

41, 42, 43 of the outer annular surface of the roller 4 each satisfy a logarithmic curve curvature.

The inner spacer 3 is provided with a plurality of oil injection holes 6. The oil filling hole 6 is processed on the inner space ring 3, so that the bearing is more convenient to effectively lubricate, and the service life of the bearing is effectively prolonged.

The raceways of the inner ring 1 and the outer ring 2 are both arc surfaces which are concave outwards.

As shown in fig. 3, the rollers 4 of the double row tapered roller bearing are processed into a logarithmic generatrix form, instead of a semicircular generatrix form which is generally used at present. The raceway of the inner ring 1 and the raceway of the outer ring 2 are slightly convex, so that the parts of the bearing are better contacted and dispersed in stress in the using process, and the bearing load is improved.

This double-row roller 4 bearing sets up two inner circles 1 and interior spacer 3 through optimizing bearing structure for bearing structure is stable, can bear higher load. The roller 4 is prevented from bursting through the arrangement of the inner ring spacer 3, and the loading capacity of the roller 4 is stronger. The main optimization of the bearing lies in the shape of the outer ring surface of the roller 4 and the special shape and size of the transition part 44, and the roller 4 is used for matching the slight bulge of the inner ring 1 raceway and the outer ring 2 raceway, so that the parts of the bearing are better contacted and the stress is dispersed in the using process, and the bearing load is improved.

In this embodiment, two raceways adopted by the outer ring 2 form a V-shaped structure, the two raceways of the outer ring 2 are respectively and correspondingly provided with two rollers 4, the outer annular surface of the inner ring 1 is provided with a groove, the rollers 4 are arranged in the grooves, and the transition portions 44 of the bottom and the side wall of the groove are provided with concave cutting grooves which can be used as oil storage grooves.

As shown in fig. 2, in the present embodiment, the main body of the outer annular surface of the roller 4 is a tapered surface, the overall axial length of the roller 4 is 68.06mm, the small end diameter is 31.864mm, the large end diameter is 36.592mm, the position SR of the large end surface close to the outer annular surface is 459mm, the axial length of the second segment 42 is 8.1mm, the transition 44 is a smooth transition, and the radius R6500 of the transition 44 is provided.

The foregoing is only a preferred embodiment of the present invention, and many variations can be made in the specific embodiments and applications of the present invention by those skilled in the art without departing from the spirit of the present invention.

Claims

1. High double-row tapered roller bearing who bears long-life, its characterized in that: the roller bearing comprises two inner rings, two outer rings, an inner ring spacer, two rows of rollers and a retainer, wherein the two rows of rollers are respectively arranged between the two inner rings and the two outer rings, the inner ring spacer is arranged between the two inner rings and separates the two inner rings, the rollers are tapered rollers, the outer ring surface of each roller comprises a first section externally arranged in the middle, a second section is arranged between the first section and the small end surface of each roller, a third section is arranged between the first section and the large end surface of each roller, the transition position between the second section and the small end surface of each roller, the transition position between the second section and the first end, the transition position between the first section and the third section and the transition position between the third section and the large end surface of each roller are in circular arc transition, and the curvature radius of the transition position is 6300-6700 mm; the first section, the second section and the third section in the outer ring surface of the roller are all convex arc surfaces;

2. The high-load-bearing long-life double row tapered roller bearing according to claim 1, wherein: the big end face of the roller faces the end part of the bearing, the small end face of the roller faces the inside of the bearing, and the big end face of the roller is provided with a recess with the maximum depth of 2 mm.

3. The high-load-bearing long-life double row tapered roller bearing according to claim 1, wherein: and a plurality of oil injection holes are formed in the inner spacer ring.

4. The high-load-bearing long-life double row tapered roller bearing according to claim 1, wherein: the inner ring surface of the outer ring is provided with two raceways, and the two raceways form a V-shaped structure.

5. The high-load-bearing long-life double row tapered roller bearing according to claim 1, wherein: the outer ring surface of the inner ring is provided with a groove, and the roller is arranged in the groove.

6. The high-load-bearing long-life double-row tapered roller bearing according to claim 5, wherein: the transition position of the bottom and the side wall of the groove is provided with an inwards concave cutting groove which can be used as an oil storage groove.