Bearing assembly and centering support structure therefor
The bearing assembly includes an annular bearing in which the shaft is disposed and a support structure for supporting the bearing. The bearing support is mounted about and radially supports the bearing. The bearing support at least in part defines a squeeze film annulus of the bearing assembly. A plurality of centering elements is associated with the bearing and bearing support and act to center the bearing within the squeeze film annulus. The centering elements are provided at radially spaced locations around the bearing. The centering elements may also be cylinder springs provided at uniformly spaced locations around the bearing. The centering elements may additionally be load cell springs provided at uniformly spaced locations around the bearing. In an alternative embodiment, a singular annular wave spring may be provided in place of the plurality of centering elements.
1. A bearing assembly for a rotating shaft comprising:
a bearing in which the shaft is disposed;
a bearing support mounted about and radially supporting the bearing, the bearing support at least in part defining a squeeze film annulus of the bearing assembly; and
at least one centering element associated with the bearing and bearing support and acting to center the bearing within the squeeze film annulus,
wherein the at least one centering element comprises a plurality of load cell springs provided at radially spaced locations around the bearing.
2. A bearing assembly as claimed in claim 1 wherein the at least one centering element comprises at least one wave spring.
3. A bearing assembly as claimed in claim 2 wherein the at least one wave spring substantially encircles the bearing support.
4. A bearing assembly as claimed in claim 1 wherein the at least one centering element comprises a plurality of beam springs positioned at spaced locations around the bearing support.
5. A bearing assembly as claimed in claim 4 further comprising a housing enclosing the bearing support, and wherein each beam spring comprises a raised support pad at each end to seat against the housing and a raised reaction pad at an approximate center of the beam spring to seat against the bearing support.
6. A bearing assembly as claimed in claim 4 wherein the beam springs are uniformly distributed about the circumference of the bearing support.
7. A bearing assembly as claimed in claim 1 wherein the at least one centering element comprises a plurality of cylinder springs provided at spaced locations around the bearing support.
8. A bearing assembly as claimed in claim 7 wherein the cylinder springs are uniformly distributed about the circumference of the bearing support.
9. A bearing assembly as claimed in claim 7 wherein the cylinder springs are tapered on at least one axial end.
10. A bearing assembly as claimed in claim 1 wherein each load cell spring comprises at least one beam spring element.
11. A bearing assembly as claimed in claim 10 wherein the beam spring element defines at least one internal space therein.
12. A bearing assembly as claimed in claim 1 wherein each load cell spring comprises a plurality of overlapping beam spring elements.
13. A bearing assembly as claimed in claim 12 wherein at least one of the overlapping spring elements defines an internal space therein.
14. A bearing assembly as claimed in claim 12 wherein the overlapping beam spring elements define intervening spaces between the beam spring elements.
15. A bearing assembly as claimed in claim 1 wherein each load cell spring comprises a body defining at least one internal space therein.
16. A bearing assembly for a rotating shaft comprising:
a bearing in which the shaft is disposed;
a bearing support mounted about and radially supporting the bearing, the bearing support at least in part defining a squeeze film annulus of the bearing assembly; and
a plurality of centering spring elements associated with the bearing support and acting on the bearing support to center the bearing within the squeeze film annulus, the centering spring elements positioned at spaced locations around the bearing support,
wherein the at least one centering element comprises a plurality of load cell springs provided at radially spaced locations around the bearing.
17. A bearing assembly as claimed in claim 16 wherein the centering spring elements comprise cylinder springs positioned at uniformly spaced locations around the bearing.
18. A bearing assembly as claimed in claim 16 wherein each load cell spring comprises at least one beam spring element.
19. A bearing assembly as claimed in claim 18 wherein the beam spring element defines at least one internal space therein.
20. A bearing assembly as claimed in claim 16 wherein each load cell spring comprises a plurality of overlapping beam spring elements.
21. A bearing assembly as claimed in claim 20 wherein at least one of the overlapping spring elements defines an internal space therein.
22. A bearing assembly as claimed in claim 20 wherein the overlapping beam spring elements define intervening spaces between the beam spring elements.
23. A bearing assembly as claimed in claim 16 wherein each load cell spring comprises a body defining at least one internal space therein.