A helical tooth type magnetic fluid sealing device

Abstract

The invention relates to an oblique-tooth magnetofluid sealing device. The oblique-tooth magnetofluid sealing device comprises a shell, a left pole shoe ring, an inner pole shoe ring, a right pole shoe ring and a permanent magnet ring. The left pole shoe ring and the right pole shoe ring are arranged on the inner wall of the shell. One or more oblique pole teeth I are arranged on the right end face of the left pole shoe ring in the radial direction at intervals. One or more oblique pole teeth II are arranged on the left end face of the inner pole shoe ring in the radial direction at intervals.One or more axial pole teeth II are arranged on the right end face of the inner pole shoe ring in the radial direction at intervals. The oblique pole teeth II and the axial pole teeth I are distributed in a staggered mode, and the oblique pole teeth I do not make contact with the axial pole teeth I. The permanent magnet ring is arranged on the inner wall of the shell and is located between the left pole shoe ring and the right pole shoe ring. By adoption of the oblique-tooth magnetofluid sealing device, the problem that the pressure resistance of an existing sealing device is affected due torotating axis eccentricity and large eccentric force of the existing sealing device can be solved.

Description

technical field [0001] The invention belongs to the field of mechanical engineering seals, in particular to a helical tooth 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; at the same time, due to the high-speed rotation of the shaft The lower magnetic fluid will be affected by a large centrifugal force, so that part of the magnetic fluid will be lost, which will reduce the pressure resistance of the magnetic fluid seal. Therefore, reducing the influence of shaft eccentricity and centrifugal force on the pressure resistance performance of magnetic liquid seals is one of the hot issues in current research. [0003] One of the methods to reduce the impact of shaft ecce...

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Problems solved by technology

[0004] The purpose of the present invention is to provide a helical tooth type magnetic fluid sealing device, so as to solve the problem that the existing sealing device has the eccentricity of the rotating shaft and the large centrifugal force, which affects the pressure resistance 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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