| 摘要 |
1486369 Bearings KUGELFISCHER GEORG SCHAFER & CO 3 Sept 1975 [12 Oct 1974] 36361/75 Heading F2A A bearing assembly comprises an axially loadable rolling bearing 2 and a hydrostatic axial bearing arranged in tandem such that the same proportions of the load F on a shaft 1 mounted in the bearings are applied to both bearings independently of the magnitude of the load. The outer race 21 of the rolling bearing transmits load to a housing 4 through an axially slidable piston-like bush 3. The hydrostatic bearing is formed between a ring 5 attached to the shaft and a pocket 8 in one face of an axially movable piston 6. In operation, oil is supplied under pressure to a chamber 9 formed between the rear face 6<SP>1</SP> of the piston 6 and the housing 4. Excess oil passes through a throttled passage 7, 7<SP>1</SP> to the pocket 8. The hydrostatic bearing is thereby brought into operation and relieves the loading on the rolling bearing. With further increase of oil pressure, the face 3<SP>1</SP> of the bush 3 is moved away from housing 4. Excess oil then runs through the gap to a groove 15 and from there back to an oil supply tank. A spring 12 is provided to keep the piston 6 out of contact with the ring 5 before the hydrostatic bearing is in operation. The whole assembly can be mounted in the bore of an outer housing structure 11 and secured by means of an end cap 13. |
