Magneticfluid sealing device applied to electric push rod

Abstract

The invention provides to a magneticfluid sealing device applied to an electric push rod. The magnetic fluid sealing device comprises a positioning piece, a dustproof sealing ring, a first magnetic conductive pole shoe, a non-conductive magnet, a second magnetic conductive pole shoe, and a permanent magnet, wherein the dustproof sealing ring is arranged at the front part of the positioning piece; the permanent magnet, the first magnetic conductive pole shoe and the second magnetic conductive pole shoe are arranged in the positioning piece in parallel; the first magnetic conductive pole shoe and the second magnetic conductive pole shoe are separated through the non-conductive magnet; pole teeth and sealing ring grooves are arranged / formed on / in the inner annular surface of the first magnetic conductive pole shoe and the inner annular surface of the second magnetic conductive pole shoe, and the pole teeth are filled with magnetic fluids. The magnetic fluid sealing device disclosed by the invention is mainly applied between a push rod and an outer sleeve to isolate water, air and pollution damaging factors, and effective waterproof and dustproof effects are achieved.

Description

technical field [0001] The invention relates to a sealing device, in particular to a magnetic fluid sealing device applied to an electric push rod. Background technique [0002] In the field of linear drive at this stage, electric push rods are widely used due to their unique advantages over pneumatic or hydraulic push rods. However, at present, there is a common problem in push rod actuators, that is, the cylinder pair formed by the push rod and its support tube that performs straight-in and straight-out motions, due to the existence of a fit gap, it is difficult for push rod actuators to be effective. sealed. [0003] Furthermore, especially in the working environment of rainwater or complete immersion in water, the seal at the gap of the kinematic pair cannot effectively prevent external liquid from entering the inside of the push rod, especially when the seal ring is aging, the leakage phenomenon is more serious. In addition, for an environment with high relative air h...

AI Technical Summary

Problems solved by technology

But at present, there is a common problem in push rod actuators, that is, the cylinder pair formed by the push rod and its support tube that performs straight-in and straight-out motion, due to the existence of a fit gap, it is difficult for push rod actuators to be effective. ground seal

[0003] Furthermore, especially in the working environment of rainwater or complete immersion in water, the seal at the gap of the kinematic pair cannot effectively prevent external liquid from entering the inside of the push rod, especially when the seal ring is aging, the leakage phenomenon is more serious

In addition, for the environment with high relative air humidity, humid air entering the inside of the push rod will also cause corrosion of the internal structure of the push rod, especially the damage to the push rod circuit structure

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