Oil seal structure used in high speed motor

Abstract

The invention disclosed an oil seal structure used in a high speed motor. The oil seal structure comprises: a shell, a bearing and a rotor. The rotor is installed on a central axis of a shell bearing hole through the bearing. A boss of an inside of the bearing hole of the shell is successively equipped with a first O-shaped circle, a first oil seal component, a second O-shaped circle and a second oil seal component. Several sawtooths are arranged on the first oil seal component and the second oil seal component. The sawtooths and the rotor form a labyrinth seal structure. The rotor is provided with three convex rings. The three convex rings divides the sawtooths into three parts so as to form a three grade labyrinth structure and a first interstage space, a second interstage space and a third interstage space. In the invention, a structure is simple, compact and reasonable. A pressure balance hole which is above the interstage spaces can be used to reduce an adsorption block phenomenon of a lubrication oil so that the lubrication oil can timely return to an oil tank through an oil return hole below. Simultaneously, heights of the convex rings on the rotor are high, which can effectively reduce a leakage transmission ability of the oil between the interstage and tightness of the labyrinth oil seal structure can be increased.

Description

technical field [0001] The invention relates to an oil seal structure for a high-speed motor, in particular to a seal structure for preventing pressure oil in a tilting pad bearing from leaking into the inner cavity of the motor, and belongs to the technical field of mechanical structures. Background technique [0002] In the process of developing high-speed motors for high-speed centrifugal fans, after repeated tests, it is feasible to use improved tilting pad bearings to replace magnetic suspension bearings, but because the pressure oil in the tilting pad bearings is easy to leak into the inner cavity of the motor, the reduction The service life of the motor, so a special oil seal structure is required to prevent the leakage of pressure oil. Contents of the invention [0003] The purpose of the present invention is to prevent pressure oil from leaking into the inner cavity of the motor, thereby providing an oil seal structure for high-speed motors, which is improved fro...

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Problems solved by technology

[0002] In the process of developing high-speed motors for high-speed centrifugal fans, after repeated tests, it is feasible to use improved tilting pad bearings to replace magnetic suspension bearings, but because the pressure oil in the tilting pad bearings is easy to leak into the inner cavity of the motor, the reduction The service life of the motor, so a special oil seal structure is required to prevent the leakage of pressure oil

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