There is provided a method of assembling a bearing assembly, having the steps of mounting a bearing stack on an inner mandrel, the bearing stack having a plurality of inner and outer races, compressing the plurality of inner races between first and second inner shoulders to within a predetermined ra
There is provided a method of assembling a bearing assembly, having the steps of mounting a bearing stack on an inner mandrel, the bearing stack having a plurality of inner and outer races, compressing the plurality of inner races between first and second inner shoulders to within a predetermined range of compressive loads, the first and second inner shoulders being carried by the inner mandrel, inserting the inner mandrel and bearing stack into an outer housing, compressing the plurality of outer races between first and second outer shoulders to within a predetermined range of compressive loads, the first and second outer shoulders being carried by the housing, wherein at least one of the first outer shoulder and the second outer shoulder comprises a deformable shim that follows a deformation curve having at least a plastic deformation component when compressed across the predetermined range of compressive loads.
대표청구항▼
1. A method of assembling a bearing assembly, comprising the steps of: mounting a bearing stack on an inner mandrel, the bearing stack comprising a plurality of inner races and a plurality of outer races;compressing the plurality of inner races between a first inner shoulder and a second inner shoul
1. A method of assembling a bearing assembly, comprising the steps of: mounting a bearing stack on an inner mandrel, the bearing stack comprising a plurality of inner races and a plurality of outer races;compressing the plurality of inner races between a first inner shoulder and a second inner shoulder to within a predetermined range of compressive loads, the first and second inner shoulders being carried by the inner mandrel;inserting the inner mandrel and bearing stack into an outer housing;compressing the plurality of outer races between a first outer shoulder and a second outer shoulder to within a predetermined range of compressive loads, the first and second outer shoulders being carried by the housing, wherein at least one of the first outer shoulder and the second outer shoulder comprises a deformable shim that follows a deformation curve having at least a plastic deformation component when compressed across the predetermined range of compressive loads. 2. The method of claim 1, wherein compressing the plurality of outer races comprises plastically deforming the deformable shim. 3. The method of claim 1, wherein the deformable shim is plastically deformed by at least 0.005 inches. 4. The method of claim 1, wherein the deformable shim is plastically deformed by at least 0.030 inches. 5. The method of claim 1, wherein the deformable shim is plastically deformed by no more than 0.060 inches. 6. The method of claim 1, wherein the deformation curve further comprises an elastic deformation component. 7. The method of claim 1, further comprising the step of manufacturing the deformable shim with a shaped profile that achieves a desired deformation curve. 8. The method of claim 1, wherein compressing the plurality of inner races comprises threading a sleeve onto the mandrel section, the mandrel section carrying the first inner shoulder and the sleeve carrying the second inner shoulder. 9. The method of claim 1, wherein the housing comprises a first section and a second housing section and compressing the plurality of outer races comprises threading the first housing section onto the second housing section, the first housing section carrying the first outer shoulder and the second housing section carrying the second outer section. 10. The method of claim 9, wherein the first housing section and the second housing section sealingly engage the inner mandrel on either side of the bearing stack. 11. The method of claim 1, wherein at least one other of the first inner shoulder and the second inner shoulder comprises a non-deformable shim. 12. A bearing assembly, comprising: an inner mandrel;an outer housing rotatably mounted to the inner mandrel; anda bearing stack mounted between the inner mandrel and the outer housing, the bearing stack comprising: a plurality of inner races compressively mounted between a first inner shoulder and a second inner shoulder to within a predetermined range of compressive loads, the first and second inner shoulders being carried by the inner mandrel;a plurality of outer races compressively mounted between a first outer shoulder and a second outer shoulder to within the predetermined range of compressive loads, the first and second outer shoulders being carried by the outer housing; andat least one of the first outer shoulder and the second outer shoulder comprising a deformable shim that follows a deformation curve that has at least a plastic deformation component when compressed across the predetermined range of compressive loads. 13. The bearing assembly of claim 12, wherein the deformable shim is plastically deformed by at least 0.005 inches as it is compressed to within the predetermined range of compressive loads. 14. The bearing assembly of claim 12, wherein the deformable shim is plastically deformed by at least 0.030 inches as it is compressed to within the predetermined range of compressive loads. 15. The bearing assembly of claim 12, wherein the deformable shim is plastically deformed by no more than 0.060 inches as it is compressed to within the predetermined range of compressive loads. 16. The bearing assembly of claim 12, wherein the deformation curve further comprises an elastic deformation component. 17. The bearing assembly of claim 12, wherein the deformable shim comprises a shaped profile that defines a cavity into which the deformable shim deforms under the compressive load. 18. The bearing assembly of claim 12, wherein the inner mandrel comprises a first mandrel section that carries the first inner shoulder and a sleeve section that carries the second inner shoulder, the sleeve section being connected to the first mandrel section by a mandrel threaded connection, and wherein the compressive load applied to the inner races is adjusted by adjusting the threaded connection. 19. The bearing assembly of claim 12, wherein the housing comprises a first housing section that carries the first outer shoulder and a second housing section that carries the second outer shoulder, the second housing section being threaded onto the first housing section by a housing threaded connection, and wherein the compressive load applied to the outer races is adjusted by adjusting the housing threaded connection. 20. The bearing assembly of claim 19, wherein the first housing section and the second housing section sealingly engage the inner mandrel on either side of the bearing stack.
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