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

Abstract

An oil-returning hydrostatic bearing with an outer gap throttling chamber and inner hole, which includes a bearing body with a cone at one end, and four bearing oil chambers evenly distributed along the circumference on the inner surface of the bearing body, and the cone of the bearing body is mounted on There is a corresponding taper sleeve and a lock nut is installed at its rear end. Two annular grooves are opened on the outer tapered surface of the cone. The outer tapered surface between the two annular grooves and the corresponding inner surface of the taper sleeve There is a throttling ring gap connecting the two annular grooves. The inner surface of the tapered sleeve is provided with two annular grooves corresponding to and connected to the two annular grooves on the outer cone surface. The inner surface of the tapered sleeve is provided with a The four oil grooves are uniformly distributed and connected to the two annular grooves on the inner surface, and the four bearing oil chambers on the inner surface of the bearing are respectively connected to the throttle ring gap through corresponding oil return holes. The annular groove is connected. It has a simple structure, is easy to manufacture, and improves the rigidity of the oil film as far as possible under the condition of economical rationality, so that the bearing works stably and reliably and has good performance.

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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