A corrugated foil type air dynamic pressure bearing

Abstract

A corrugated foil type air dynamic pressure bearing. It includes a shoulder, a bearing shell, a flat foil and multiple corrugated foils; the shoulder is formed by extending radially outward from one end edge of the bearing shell; multiple flat foils are arranged side by side, and two adjacent flat foils The side edges overlap each other; the corrugated foils are provided with two kinds of corrugations alternately arranged with different radii of curvature, one side is attached to the outer surface of all flat foils, and the other side is fixed on the inner circumferential surface of the bearing housing On the top, one end of the flat foil and multiple corrugated foils is fixed on the inner circumferential surface of the bearing housing at the same time, and the other end is a free end. The invention can replace the ball bearings on small commercial aircraft, reduce the weight of the engine, and can replace the traditional lubricating oil lubrication with gas lubrication. When the engine is in the working state, because the upper wedge gap is small and the dynamic pressure effect is strong, it can provide The bearing capacity is equivalent to the rigid surface gas dynamic pressure bearing, which can greatly reduce the friction force, resistance and vibration of the bearing, and increase the working stability of the engine.

Description

technical field [0001] The invention belongs to the technical field of mechanical equipment, in particular to a corrugated foil type air dynamic pressure bearing. Background technique [0002] Rotating machinery has been widely used in cryogenic engineering, aviation, aerospace, and national defense. In recent years, with the continuous development of this technology, the working environment of rotating machinery has become more and more harsh, so people have more and more requirements for its performance. high. As the main supporting part of the rotor, the bearing is a key component of the rotating machine, and its performance will directly affect the operating quality of the rotating system. Therefore, how to ensure and improve the performance of bearings has become one of the key technical problems that need to be faced and solved in the development process of various fields. [0003] At present, the main lubrication method used by aero-engines is lubricating oil lubric...

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Problems solved by technology

[0003] At present, the main lubrication method used by aero-engines is lubricating oil lubrication, that is, a lubrication system that combines rolling bearings and ball bearings. The disadvantage is that it has low load-carrying capacity and limited damping level, so the reliability and life of the engine will be greatly reduced.

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