Double-row spherical roller bearing

Patent metadata

Field	Value
Publication number	US-10001164-B2
Application number	US-201614988899-A
Country	US
Kind code	B2
Filing date	Jan 6, 2016
Priority date	Jan 8, 2015
Publication date	Jun 19, 2018
Grant date	Jun 19, 2018

Abstract

A double-row spherical roller bearing, comprising an outer ring including at least one spherical inner raceway on a radially inner peripheral surface, an inner ring including a first and second axial end and at least one outer raceway on a radially outer peripheral surface. Spherical roller elements are located in first and second roller rows interposed in-between the inner and outer raceways. A first flange is located at the first axial end, extending in a circumferential direction of the outer peripheral surface. The inner ring is subjected to an axial load in a first axial direction wherein the first flange approaches the first roller row. An axial extension of the first flange extends without contacting any first roller row roller elements during bearing operation, when an axial load is acting on the inner ring in the first axial direction. The bearing can be integrated into a wind turbine.

First claim

What is claimed is:

1. A double-row spherical roller bearing, comprising:
an outer ring presenting at least one spherical inner raceway on a radially inner peripheral surface;
an inner ring presenting a first axial end and a second axial end and at least one outer raceway on a radially outer peripheral surface;
spherical roller elements located in a first roller row and a second roller row interposed in-between the at least one inner raceway and the at least one outer raceway; and
a first flange located at the first axial end and extending in the circumferential direction of the outer peripheral surface, wherein a first axial gap Δ1 is located in-between the first flange and the adjacent first roller row,
wherein the inner ring is adapted to be subjected to an axial load in a first axial direction such that the first flange approaches the first roller row,
wherein, during operation of the bearing, the first axial gap Δ1 will not decrease to zero when the axial load is acting on the inner ring in the first axial direction.

2. The double-row spherical roller bearing according to claim 1 , further comprising:
a second flange located at the second axial end and extending in the circumferential direction of the outer peripheral surface, wherein there is a second axial gap Δ2 located in-between the second flange and the adjacent second roller row.

3. The double-row spherical roller bearing according to claim 2 ,
wherein any of the first flange or the second flange presents an inner axial end face surface extending radially and in the circumferential direction,
wherein the inner axial end face surface is angled out from the at least one outer raceway in the range of 0-3 degrees in relation to the radial direction of the bearing.

4. The double-row spherical roller bearing according to claim 2 , wherein the inner ring further includes:
a first circumferential intermediate surface located on the outer peripheral surface and axially in-between the first flange and the at least one outer raceway, and
a second circumferential intermediate surface located on the outer peripheral surface and axially in-between the second flange and the at least one outer raceway.

5. The double-row spherical roller bearing according to claim 4 ,
wherein an axial extension of the second intermediate surface is extending such that a turning tool for turning the at least one outer raceway will not come in contact with the second flange during a turning operation.

6. The double-row spherical roller bearing according to claim 4 ,
wherein an axial extension of any of the first or second intermediate surfaces is extending such that a turning tool for turning the at least one outer raceway will not come in contact with the first or second respective flange during a turning operation.

7. The double-row spherical roller bearing according to claim 6 ,
wherein any of the first intermediate surface or the second intermediate surface is further extended such that there is an axial gap between the turning tool and the first respective flange or the second respective flange when the turning tool has reached a respective first second axial end of the outer raceway or the second axial end of the outer raceway during the turning operation.

8. The double-row spherical roller bearing according to claim 7 ,
wherein the respective axial gap between the turning tool and any of the first flange or the second flange during the turning operation is in the range of 1-3 mm.

9. The double-row spherical roller bearing according to claim 7 ,
wherein the respective axial gap between the turning tool and any of the first flange or the second flange during the turning operation is 2 mm.

10. The double-row spherical roller bearing according to claim 2 ,
wherein the inner ring is adapted to be subjected to an axial load in a second axial direction such that the second flange approaches the second roller row,
wherein, during operation of the bearing, the second axial gap Δ2 will not decrease to zero when the axial load is acting on the inner ring in the second axial direction.

11. The double-row spherical roller bearing according to claim 10 ,
wherein the inner raceway and the outer raceway are designed to ensure that, during operation of the bearing, the second axial gap Δ2 will not decrease to zero when the axial load acting on the inner ring in the second axial direction corresponds to an equivalent load in a range of 4≥C/P≥1,
wherein C is a basic dynamic load rating in Newtons and wherein P is an equivalent dynamic bearing load in Newtons.

12. The double-row spherical roller bearing according to claim 1 ,
wherein the inner raceway and the outer raceway are designed to ensure that, during operation of the bearing, the first axial gap Δ1 will not decrease to zero when the axial load acting on the inner ring in the first axial direction corresponds to an equivalent load in a range of 4≥C/P≥1,
wherein C is a basic dynamic load rating in Newtons and wherein P is an equivalent dynamic bearing load in Newtons.

13. The double-row spherical roller bearing according to claim 1 ,
wherein the inner ring further includes a first circumferential intermediate surface located on the outer peripheral surface and axially in-between the first flange and the at least one outer raceway.

14. The double-row spherical roller bearing according to claim 13 ,
wherein an axial extension of the first intermediate surface is extending such that a turning tool for turning the at least one outer raceway will not come in contact with the first flange during a turning operation.

15. A wind turbine bearing arrangement, comprising,
a rotor shaft connected to a plurality of rotor blades via a hub,
at least one rolling bearing, wherein the at least one rolling bearing is a double-row spherical roller bearing comprising:
an outer ring presenting at least one spherical inner raceway on a radially inner peripheral surface;
an inner ring presenting a first axial end and a second axial end and at least one outer raceway on a radially outer peripheral surface;
spherical roller elements located in a first roller row and a second roller row interposed in-between the at least one inner raceway and the at least one outer raceway; and
a first flange located at the first axial end and extending in the circumferential direction of the outer peripheral surface, wherein a first axial gap Δ 1 is located in-between the first flange and the adjacent first roller row,

wherein the inner ring is adapted to be subjected to an axial load in a first axial direction such that the first flange approaches the first roller row,
wherein, during operation of the bearing, the first axial gap Δ 1 will not decrease to zero when the axial load is acting on the inner ring in the first axial direction,
wherein the rotor shaft is rotatably supported by the at least one rolling bearing.

Assignees

• Bjorkman Emma
• James Peter
• Loof Marcus
• Stigsjoeoe Lars
• Skf Ab

Inventors

• Bjorkman Emma
• James Peter
• Loof Marcus
• Stigsjöö Lars

Classifications

• F16C2360/31

  Wind motors · CPC title

• F03D80/70

  Bearing or lubricating arrangements · CPC title

• F16C23/084 Primary

  sliding on a complementary spherical surface · CPC title

• F03D1/0666

  Mechanical Engineering · mapped topic

• F16C19/38 Primary

  with two or more rows of rollers · CPC title