Aerostatic-pressurized radial bearing

Abstract

The invention discloses an aerostatic-pressurized radial bearing. The aerostatic-pressurized radial bearing mainly comprises porous circular tubes, metallic circular tubes, a radial bearing sleeve, a metallic sleeve and displacement sensors, wherein the porous circular tubes are coaxially glued to the internal walls of the metallic circular tubes, integers formed by the porous circular tubes and the metallic circular tubes are symmetrically arranged at the two sides of the metallic sleeve, blind holes are respectively formed in the end faces of the metallic circular tubes and the end face of the metallic sleeve and are matched with cylindrical pins, the metallic circular tubes and the metallic sleeve are connected through cylindrical pins, the radial bearing sleeve coaxially sleeves the outermost layer of the porous circular tubes and the metallic circular tubes, bearing end covers are respectively arranged at the two ends of the radial bearing sleeve, and the displacement sensors are arranged on the side face of the radial bearing sleeve. According to the aerostatic-pressurized radial bearing, relatively high load carrying capacity and static rigidity and good stability are provided, accurate and rapid response can be achieved, and active control can be excellently realized.

Description

technical field [0001] The invention relates to the technical field of air bearings, in particular to an aerostatic radial bearing. Background technique [0002] Gas static pressure bearing is a kind of sliding bearing with gas as lubricant. Its principle is that the fluid forms a thin film under the action of external pressure to support the external load. The pressure film in the bearing has a homogenizing effect, and the bearing has high rotation accuracy, wide speed range, low friction coefficient, low drive power consumption, no crawling at low speed feed, high positioning accuracy, excellent damping characteristics, no friction and wear, and long service life Long and other advantages. However, aerostatic bearings also have many disadvantages, such as: small load, low stiffness, poor stability and so on. [0003] After a period of development, the gas static pressure bearing has greatly improved its load capacity and stiffness. Its main forms are small hole throttlin...

AI Technical Summary

Problems solved by technology

For porous hydrostatic bearings, since the surface of the porous material is evenly distributed with thousands of small holes, using this material as the surface of the gas hydrostatic bearing will generate a more uniform pressure distribution on the bearing surface, so it has great advantages. High load capacity and static stiffness, and good dynamic stability, but the porous hydrostatic bearing responds slowly when the air supply pressure changes, which is not conducive to active control

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