Hard bearing attachment and alignment systems, apparatus, and techniques
A mechanical bearing includes a hard bearing element and a support element affixed to the hard bearing element, with a joining element between the hard bearing element and the support element, the joining element being more flexible than the hard bearing element and the support element.
1. A mechanical bearing comprising:
a hard bearing element, the hard bearing element having a first coefficient of thermal expansion;
a support element affixed to the hard bearing element, at least one of the hard bearing element or the support element including a textured bonding surface, the support element having a second coefficient of thermal expansion different from the first coefficient of thermal expansion; and
a joining element between the hard bearing element and the support element and fixing the hard bearing element to the support element, the joining element being more flexible than the hard bearing element and the support element, wherein the textured bonding surface takes up shrinkage in the joining element due to a thermal expansion mismatch between the hard bearing element and the support element.
2. The mechanical bearing as recited in claim 1 , wherein the mechanical bearing comprises a journal bearing.
3. The mechanical bearing as recited in claim 1 , wherein the hard bearing element comprises an ultrahard material.
4. The mechanical bearing as recited in claim 3 , wherein the ultrahard material comprises at least one of a diamond-based material or a tungsten carbide material.
5. The mechanical bearing as recited in claim 1 , wherein the support element comprises at least one of a metal or a metal alloy.
6. The mechanical bearing as recited in claim 1 , wherein the support element comprises a mechanical assembly feature.
7. The mechanical bearing as recited in claim 1 , wherein the joining element is melted between the hard bearing element and the support element.
8. The mechanical bearing as recited in claim 1 , wherein the joining element comprises at least one of a polymer, an epoxy, an anaerobic adhesive, an elastomer, or a threading compound.
9. The mechanical bearing as recited in claim 1 , wherein the support element comprises at least one of a shaft or a housing.
10. The mechanical bearing as recited in claim 1 , wherein the joining element is disposed in mating tapers formed in the hard bearing element and the support element.
11. The mechanical bearing of claim 1 , the support element including a support mechanical feature and the hard bearing element including a bearing mechanical feature, the support mechanical feature and the bearing mechanical feature supporting at least a portion of the bearing load on the mechanical bearing.
12. A method of forming a mechanical bearing having a mounting surface and a running surface, the method comprising:
fixing a joining element between a hard bearing element having a first surface and a support element to join the hard bearing element and the support element, the joining element being more flexible than the hard bearing element and the support element; and
modifying a surface of the support element to provide a second surface on the support element aligned with the first surface on the hard bearing element.
13. The method as recited in claim 12 , wherein the mechanical bearing comprises at least one of a thrust bearing or a journal bearing.
14. The method as recited in claim 12 , wherein the hard bearing element comprises an ultrahard material.
15. The method as recited in claim 14 , wherein the ultrahard material comprises at least one of a diamond-based material or a tungsten carbide material.
16. The method as recited in claim 12 , wherein the support element comprises at least one of a metal or a metal alloy.
17. The method as recited in claim 12 , wherein the joining element is melted between the hard bearing element and the support element.
18. The method as recited in claim 12 , wherein the joining element comprises at least one of a polymer, an epoxy, an anaerobic adhesive, an elastomer, or a threading compound.
19. The method as recited in claim 12 , wherein the support element comprises at least one of a shaft or a housing.
20. The method as recited in claim 12 , wherein the joining element is disposed in mating tapers formed in the hard bearing element and the support element.
21. A method of forming a mechanical bearing having a mounting surface and a running surface, the method comprising:
positioning the hard bearing element with a first surface and the support element with a second surface to align the first surface on the hard bearing element with the second surface using an alignment fixture; and
joining the hard bearing element and the support element using a joining element on the bonding surface, the joining element being more flexible than the hard bearing element and the support element;
dialing in to the bearing surface; and
machining the support element to an operating shape and dimension.