Pore type air floating ball bearing

Abstract

A pore type air floating ball bearing is mainly composed of a convex spherical rotor, a concave spherical stator, a stator base, and an air inlet pipe nozzle. The concave spherical stator of the ball bearing utilizes the unique laminate pore structure of the stator to form a gas membrane to support the parts, and thus a uniform pressure distribution can be formed, so the ball bearing has the advantages of high bearing strength and high rigidity. At the same time the requirements of the ball bearing on manufacture precision and material technology are reduced, and the air floating ball bearing has the advantages of simple structure, good economy, and excellent performance.

Description

Technical field [0001] The invention relates to the field of mechanical engineering and air film lubrication, and is especially suitable for various high-tech applications such as precision rotation and high-speed rotation, such as a satellite three-axis air bearing table, a high-speed air bearing spindle and the like. Background technique [0002] Air bearing is a bearing that uses the viscosity of gas to increase the pressure of gas in the gap, thereby suspending objects. The ball bearing involved in the present invention is a static pressure air bearing. Gas is supplied from the outside to form an air film in the gap between the concave spherical stator and the convex spherical rotor and carry it. Air-floating ball bearings can achieve approximately frictionless three-axis rotation, which is the core component of the satellite attitude control ground test system. It can be used to simulate the microgravity flight state of satellites in space; matching pairs of air-floating bal...

AI Technical Summary

Problems solved by technology

In many cases, even if high-precision machining is achieved, high-performance air bearings may not be obtained; the porous throttling type has outstanding advantages in terms of bearing capacity and stiffness, but the process quality of porous materials has a significant impact on the performance of the bearing , in addition to this, there is a more serious problem of local hot spots

When rotating at a high speed as the main shaft, the porous wall surface will be overheated locally, which will cause the local flow resistance to increase, and the flow intensity of the air here will decrease, so that the air will flow to other places from the connected porous flow channel without passing through the hot zone. The local hot spots then expand and deteriorate, seriously affecting the performance of the bearing

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