Three-row cylindrical roller bearing

Abstract

The utility model relates to a three-row cylindrical roller bearing, which belongs to the technical field of bearings, and comprises an inner ring and an outer ring, a first axial roller, a radial roller and a second axial roller are arranged between the inner ring and the outer ring, the inner ring comprises a first ring part and a second ring part, and the three-row cylindrical roller bearing is characterized in that the inner ring is provided with a plurality of conical positioning holes and a plurality of connecting limiting holes; the conical positioning hole penetrates through the first ring part and the second ring part, a taper pin is arranged in the conical positioning hole, a first fixing piece used for fixing the taper pin is arranged on the first ring part, and a second fixing piece used for fixing the taper pin is arranged on the second ring part; the connecting limiting hole extends from the first ring part to the second ring part, a connecting bolt is arranged in the connecting limiting hole, and the connecting bolt is in threaded fit with the connecting limiting hole. Under the action of the taper pin, dislocation between the first part and the second part caused by large radial force is avoided.

Description

TECHNICAL FIELD

[0001] The utility model relates to wind power bearing technical field, especially a kind of three-row cylindrical roller bearing. BACKGROUND

[0002] Some existing wind turbine generators adopt three-row cylindrical roller bearing.

[0003] The inner ring of the three-row cylindrical roller bearing of traditional design includes first part and second part, and a plurality of tension holes are provided through the first part and the second part when the first part and the second part are combined, a tension bolt is arranged in the tension hole, and the tension bolt is mainly used to tighten the first part and the second part together.

[0004] However, due to the different wind directions in use, the bearing itself will be subjected to a large radial force and axial force, etc., which will eventually lead to a relative movement between the first part and the second part, and under long-term use, the first part and the second part are prone to misalignment, and the tension bolt is clamped between the first part and the second part, which will cause the tension bolt to be damaged and unable to be unscrewed during maintenance, resulting in inconvenience during maintenance and disassembly. SUMMARY

[0005] In view of the problems existing in the prior art, the utility model provides a three-row cylindrical roller bearing.

[0006] The technical scheme adopted by the utility model to solve the above technical problems is: a three-row cylindrical roller bearing, comprising an inner ring and an outer ring, a first axial roller, a radial roller and a second axial roller are arranged between the inner ring and the outer ring, the inner ring comprises a first ring part and a second ring part, characterized in that a plurality of conical positioning holes and a plurality of connecting limiting holes are arranged on the inner ring, the conical positioning holes penetrate through the first ring part and the second ring part, a conical pin is arranged in the conical positioning hole, a first fixing member for fixing the conical pin is arranged on the first ring part, and a second fixing member for fixing the conical pin is arranged on the second ring part.

[0007] The connecting limiting hole extends from the first ring part to the second ring part, a connecting bolt is arranged in the connecting limiting hole, and the connecting bolt is threadedly connected with the connecting limiting hole.

[0008] Further, a first counterbore is arranged on the first ring part and communicates with the conical positioning hole, the first fixing member is a first bolt, the first bolt is arranged in the first counterbore and threadedly connected with the conical pin, and a first threaded counterbore is arranged on the conical pin and cooperates with the first bolt.

[0009] Further, the second ring part is provided with a second counterbore communicating with the conical positioning hole, and the second fixing member is a second bolt arranged in the second counterbore and threadedly matched with the conical pin, and the conical pin is provided with a second threaded counterbore matched with the second bolt.

[0010] Further, the connecting limiting hole comprises a stepped through hole arranged on the second ring part and a third threaded counterbore arranged on the second ring part, and the connecting bolt passes through the stepped through hole and is threadedly matched with the third threaded counterbore.

[0011] Further, the first axial roller and the second axial roller are arranged between the inner ring and the outer ring through the first thrust retainer and the second thrust retainer respectively.

[0012] Further, the outer ring is provided with an annular groove on the inner side, and the annular groove is provided with a radial retainer, and the radial retainer is provided with a plurality of radial pockets for accommodating radial rollers.

[0013] Further, the first ring part is provided with an annular protrusion on the outer side, and the annular protrusion extends into the annular groove and abuts against the radial roller.

[0014] Further, the first ring part and the outer ring are provided with a first single-lip seal ring therebetween, the first ring part is provided with a first limiting groove matched with the first single-lip seal ring, and the outer ring is provided with a first annular stepped groove abutting against the first single-lip seal ring.

[0015] Further, the second ring part and the outer ring are provided with a second single-lip seal ring therebetween, the outer ring is provided with a second limiting groove matched with the second single-lip seal ring, and the second ring part is provided with a second annular stepped groove abutting against the second single-lip seal ring.

[0016] The beneficial effects of the present application are as follows: 1. The conical positioning hole and the conical pin are arranged, and under the action of the conical pin, the first part and the second part are prevented from being dislocated when subjected to a large radial force, thereby effectively preventing the connecting bolt from being stuck between the first part and the second part, facilitating later maintenance and disassembly; and the first fixing member and the second fixing member ensure the fixing effect of the conical pin and effectively prevent the conical pin from moving circumferentially.

[0017] 2. The radial rollers are uniformly distributed through the radial retainer, and the support of the annular protrusion improves the radial load-carrying capacity of the bearing; the first axial roller and the second axial roller are positioned through the thrust retainers, thereby realizing the balanced distribution of bidirectional axial loads.

[0018] 3. The first single-lip seal ring and the second single-lip seal ring are matched with the limiting grooves of the inner ring and the outer ring respectively, forming a double-sealing structure, effectively preventing the leakage of lubricating grease and the intrusion of foreign matters from the outside, and prolonging the service life of the bearing. BRIEF DESCRIPTION OF DRAWINGS

[0019] Figure 1 It is a structural schematic view of the utility model;

[0020] Figure 2 It is Figure 1 It is a partial enlarged view of A in the middle;

[0021] Figure 3 It is Figure 1 It is a partial enlarged view of B in the middle.

[0022] Marked in the figure: 1, outer ring, 2, inner ring, 3, conical pin, 4, connecting bolt, 5, first axial roller, 6, radial roller, 7, second axial roller, 8, first single-lip sealing ring, 9, second single-lip sealing ring, 11, first annular step groove, 21, first ring part, 22, second ring part, 211, annular convex part, 221, second annular step groove, 31, conical positioning hole, 32, first fixing piece, 33, second fixing piece, 41, connecting limiting hole, 51, first thrust retainer, 61, radial retainer, 71, second thrust retainer. DETAILED DESCRIPTION

[0023] In order to make the purpose, technical scheme and advantages of the utility model more clearly, the following will be further described in detail by combining with the drawings and examples. It should be understood that, unless otherwise specified, the meaning of "multiple" is two or more than two in the description of the utility model; the orientation or position relationship indicated by the terms "upper", "lower", "left", "right", "inner", "outer", "front end", "rear end", "head", "tail" and the like are based on the orientation or position relationship shown in the drawings, and are only for the convenience of describing the utility model and simplifying the description, and cannot be understood as indicating or implying that the indicated device or element must have a particular orientation, a particular orientation and operation, therefore, it cannot be understood as a limitation on the utility model. In addition, the terms "first", "second", "third" and the like are only for the purpose of description, and cannot be understood as indicating or implying relative importance.

[0024] Please refer to Figures 1-3The utility model discloses a three-row cylindrical roller bearing, including inner race 2 and outer ring 1, be equipped with first axial roller 5, radial roller 6 and second axial roller 7 between inner race 2 and outer ring 1, and inner race 2 includes first ring part 21 and second ring part 22, is equipped with multiple taper locating hole 31 and multiple connecting limit hole 41 on inner race 2, and taper locating hole 31 penetrates first ring part 21 with second ring part 22, is equipped with conical pin 3 in taper locating hole 31, and taper locating hole 31 with conical pin 3 is interference fit, is equipped with first fixed part 32 for the fixed first conical pin 3 on first ring part 21, and is equipped with second fixed part 33 for the fixed second conical pin 3 on second ring part 22, connecting limit hole 41 extends to second ring part 22 from first ring part 21, and is equipped with connecting bolt 4 in connecting limit hole 41, and connecting bolt 4 is screwed with connecting limit hole 41.

[0025] Wherein, first ring part 21 is equipped with the first counterbore that communicates with taper locating hole 31, and first fixed part 32 is first bolt, and first bolt is arranged in first counterbore and is screwed with conical pin 3, and is equipped with the first threaded counterbore that cooperates with first bolt on conical pin 3. Second ring part 22 is equipped with the second counterbore that communicates with taper locating hole 31, and second fixed part 33 is second bolt, and second bolt is arranged in second counterbore and is screwed with conical pin 3, and is equipped with the second threaded counterbore that cooperates with second bolt on conical pin 3. The big end of taper locating hole 31 faces up, and the small end faces down, and the first threaded counterbore is located in the big end of taper locating hole 31, and the second threaded counterbore is located in the small end of taper locating hole 31. The inner diameter of first counterbore is greater than the big end diameter of taper locating hole 31, and the inner diameter of second counterbore is greater than the small end diameter of taper locating hole 31.

[0026] Specifically, connecting limit hole 41 includes the stepped through hole arranged on second ring part 22 and the third threaded counterbore arranged on second ring part 22, and connecting bolt 4 passes through the stepped through hole and is screwed with the third threaded counterbore.

[0027] Further, first axial roller 5 and second axial roller 7 are arranged between inner race 2 and outer ring 1 through first thrust retainer 51 and second thrust retainer 71 respectively. The inner race 1 and the outer ring 2 form a rolling cavity, and the first axial roller 5 and the second axial roller 7 are arranged in the rolling cavity through the respective retainers. It should be noted that the parts not described in detail in the present application are prior art.

[0028] The inner side of the outer ring 1 is provided with an annular groove, and the annular groove is provided with a radial retainer 61. The radial retainer 61 is provided with a plurality of radial pockets for accommodating radial rollers 6.

[0029] More specifically, the first ring part 21 is provided with an annular protrusion 211 outside, which extends into the annular groove and is in contact with the radial roller 6. The annular protrusion 211 is integrally formed with the first ring part 21.

[0030] In addition, the first ring part 21 and the outer ring 1 are provided with a first single-lip seal ring 8, forming a first sealing barrier. The first ring part 21 is provided with a first limiting groove matched with the first single-lip seal ring 8, and the outer ring 1 is provided with a first annular step groove 11 in contact with the first single-lip seal ring 8. The second ring part 22 and the outer ring 1 are provided with a second single-lip seal ring 9, forming a second sealing barrier. The outer ring 1 is provided with a second limiting groove matched with the second single-lip seal ring 9, and the second ring part 22 is provided with a second annular step groove 221 in contact with the second single-lip seal ring 9.

[0031] During assembly, the first ring part 21 and the second ring part 22 are preliminarily positioned by the conical pin 3. The connecting bolt 4 is screwed into the third threaded hole, and a pre-tightening force is applied to make the two parts tightly fit. The radial retainer 61 and the radial roller 6 are installed, and the annular protrusion 211 is ensured to be in contact with the radial roller 6. The first thrust retainer 51, the first axial roller 5, the second thrust retainer 71 and the second axial roller 7 are installed in sequence. Finally, the first single-lip seal ring 8 and the second single-lip seal ring 9 are installed, and the bearing assembly is completed.

[0032] It should be noted that the above embodiments are only used to illustrate the present application, but the present application is not limited to the above embodiments, and any simple modification, equivalent change and modification of the above embodiments according to the technical essence of the present application all fall within the protection scope of the present application.

Claims

1. A three-row cylindrical roller bearing comprising an inner ring (2) and an outer ring (1), first axial rollers (5), radial rollers (6) and second axial rollers (7) being arranged between the inner ring (2) and the outer ring (1), the inner ring (2) comprising a first ring portion (21) and a second ring portion (22), characterized in that, The inner ring (2) is provided with a plurality of tapered positioning holes (31) and a plurality of connecting limiting holes (41), the tapered positioning hole (31) penetrates the first ring part (21) and the second ring part (22), the tapered positioning hole (31) is provided with a conical pin (3), the first ring part (21) is provided with a first fixing part (32) for fixing the conical pin (3), and the second ring part (22) is provided with a second fixing part (33) for fixing the conical pin (3). The connecting limiting hole (41) extends from the first ring part (21) to the second ring part (22), and the connecting limiting hole (41) is provided with a connecting bolt (4) in threaded connection with the connecting limiting hole (41).

2. A three-row cylindrical roller bearing according to claim 1, characterized in that: The first ring part (21) is provided with a first counterbore in communication with the tapered positioning hole (31), the first fixing part (32) is a first bolt, the first bolt is arranged in the first counterbore and is in threaded connection with the conical pin (3), and the conical pin (3) is provided with a first threaded counterbore matched with the first bolt.

3. A three-row cylindrical roller bearing according to claim 1 or 2, characterized in that: The second ring part (22) is provided with a second counterbore in communication with the tapered positioning hole (31), the second fixing part (33) is a second bolt, the second bolt is arranged in the second counterbore and is in threaded connection with the conical pin (3), and the conical pin (3) is provided with a second threaded counterbore matched with the second bolt.

4. A three-row cylindrical roller bearing according to claim 3, characterized in that: The connecting limiting hole (41) includes a stepped through hole arranged on the second ring part (22) and a third threaded counterbore arranged on the second ring part (22), and the connecting bolt (4) passes through the stepped through hole and is in threaded connection with the third threaded counterbore.

5. A three-row cylindrical roller bearing according to claim 1 or 2, characterized in that: The first axial roller (5) and the second axial roller (7) are arranged between the inner ring (2) and the outer ring (1) through the first thrust retainer (51) and the second thrust retainer (71) respectively.

6. A three-row cylindrical roller bearing according to claim 1, characterized in that: The inner side of the outer ring (1) is provided with an annular groove, and the annular groove is provided with a radial retainer (61), and the radial retainer (61) is provided with a plurality of radial pockets for accommodating radial rollers (6).

7. A three-row cylindrical roller bearing according to claim 1, characterized in that: The outer side of the first ring part (21) is provided with an annular protrusion (211), and the annular protrusion (211) extends into the annular groove and abuts against the radial roller (6).

8. A three-row cylindrical roller bearing according to claim 1, characterized in that: The first single-lip sealing ring (8) is arranged between the first ring part (21) and the outer ring (1), the first ring part (21) is provided with a first limiting groove matched with the first single-lip sealing ring (8), and the outer ring (1) is provided with a first annular stepped groove (11) abutting against the first single-lip sealing ring (8).

9. A three-row cylindrical roller bearing according to claim 1, characterized in that: The second single-lip sealing ring (9) is arranged between the second ring part (22) and the outer ring (1), the outer ring (1) is provided with a second limiting groove matched with the second single-lip sealing ring (9), and the second ring part (22) is provided with a second annular stepped groove (221) abutting against the second single-lip sealing ring (9).

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