Exterior-clearance throttle cavity internal-hole type scavenging hydrostatic bearing

Abstract

An outer gap throttling chamber inner hole type scavenge oil hydrostatic bearing comprises a conical bearing body, wherein, the inner surface of the bearing body is evenly distributed with four oil carrying chambers along the circle, the cone of the bearing body is provided with a corresponding taper sleeve, the rear end of the cone is provided with a locknut, the outer conical surface of the cone is provided with two annular grooves, a throttling annular space communicated with the two annular grooves is arranged between the outer conical surface of the two annular grooves and the corresponding inner surface of the taper sleeve, the inner surface of the taper sleeve is provided with two annular grooves corresponding to and communicated with the two annular grooves of the outer conical surface, the inner surface of the taper sleeve is provided with four oil sinks which are distributed evenly along the circle and are communicated with the two annular grooves on the inner surface, the four oil carrying chambers on the inner surface of the bearing body are respectively communicated with the throttling annular space through corresponding oil return holes, and the bearing body is inside provided with an oil intake channel communicated with the annular groove. The invention is of simple structure and easy manufacture. The rigidity of oil film is increased to the greatest extent under the precondition of economy and reasonability; therefore, the work of bearing is stable and reliable and the performance of bearing is good.

Description

technical field [0001] The invention relates to a hydrostatic bearing. Background technique [0002] There are various structures of hydrostatic bearings. Among the widely used constant pressure hydrostatic bearings, there are fixed throttling, variable throttling, and feedback variable throttling. Feedback variable throttling hydrostatic bearings have high oil film stiffness, but their structure is relatively complicated, and their use is limited. The internal feedback throttling hydrostatic shaft has a relatively simple structure, but requires high manufacturing accuracy. Due to the interference of the spindle winding, the improvement of the oil film stiffness of the internal feedback throttling hydrostatic bearing is affected. At the same time, the friction surface of the oil chamber is relatively large. A larger temperature rise is generated, therefore, it is not ideal. Contents of the invention [0003] The technical problem to be solved by the present invention is ...

AI Technical Summary

Problems solved by technology

Feedback variable throttle hydrostatic bearing has high oil film stiffness, but its structure is relatively complicated, and its use is limited

The internal feedback throttling hydrostatic shaft has a relatively simple structure, but requires high manufacturing precision. Due to the interference of the spindle winding, the improvement of the oil film stiffness of the internal feedback throttling hydrostatic bearing is affected. At the same time, the friction surface of the oil chamber is relatively large. produces a large temperature rise and, therefore, is not ideal

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