Tooth-aligning labyrinth magnetic fluid sealing device

Abstract

The invention relates to a tooth-aligning labyrinth magnetic fluid sealing device. The tooth-aligning labyrinth magnetic fluid sealing device comprises a housing, an inner pole shoe ring, an outer pole shoe ring, permanent magnet rings I and permanent magnet rings II, wherein the inner pole shoe ring is arranged on a shaft in a sleeving manner; the outer pole shoe ring is mounted on the inner wallof the housing, and the outer pole shoe ring and the inner pole shoe ring are oppositely arranged; a plurality of pole terminals I and pole terminals II are alternately arranged on the inner pole shoe ring in the axial direction in a spaced manner; each permanent magnet ring I is arranged between each pole terminal I and the adjacent pole terminal II; a plurality of pole terminals III and pole terminals IV are alternately arranged on the outer pole shoe ring in the axial direction in a spaced manner; each permanent magnet ring II is arranged between each pole terminal III and the adjacent pole terminal IV; the permanent magnet rings and the permanent magnets II are oppositely arranged, and a gap is formed between each permanent magnet ring and the corresponding permanent magnet II; and pole teeth are arranged on the pole terminals I and the pole terminals IV. Through the adoption of the tooth-aligning labyrinth magnetic fluid sealing device disclosed by the invention, the problem thatthe pressure resistance performance of a conventional sealing device is influenced by the eccentricity of a rotating shaft of the conventional sealing device can be solved.

Description

technical field [0001] The invention belongs to the field of mechanical engineering seals, and in particular relates to a tooth-tooth labyrinth type magnetic fluid seal device. Background technique [0002] In the magnetic liquid seal of a rotating shaft with a large shaft diameter, due to the influence of processing and assembly errors, vibration and other factors, the rotating shaft will be eccentric relative to the pole piece, which will reduce the pressure resistance of the magnetic liquid seal, so the performance of the large gap magnetic fluid seal will be improved. The withstand voltage performance is one of the hot issues in current research. [0003] One of the methods to reduce the influence of the eccentricity of the rotating shaft on the pressure resistance performance of the magnetic fluid seal is to improve the magnetic fluid sealing structure, such as the sealing device described in reference 1 (patent publication number CN 103115152A). Although the sealing d...

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to provide a labyrinth-type split magnetic fluid sealing device with teeth, so as to solve the problem that the eccentricity of the rotating shaft in the existing sealing device affects the pressure resistance performance of the sealing device, so that the sealing technology can be successfully applied to large shaft diameter and high speed. In the case of rotation

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