Self-healing seal device based on magnetorheological rubber and magnetorheological grease and reciprocating mechanism

Abstract

The invention relates to a self-healing seal device based on magnetorheological rubber and magnetorheological grease and a reciprocating mechanism. The self-healing seal device comprises a multilevel rubber seal and a multilevel magnetic seal, wherein the multilevel rubber seal comprises an upper skeleton magnetic pole, a lower skeleton magnetic pole, magnetorheological rubber with a lip, magnetorheological rubber with two lips and a permanent magnet; the permanent magnet is arranged between the upper skeleton magnetic pole and the lower skeleton magnetic pole; the magnetorheological rubber with a lip is arranged on one surface of the upper skeleton magnetic pole far from the lower skeleton magnetic pole; the magnetorheological rubber with two lips is arranged on one surface of the lower skeleton magnetic pole far from the upper skeleton magnetic pole, seal cavities are formed among the lower skeleton magnetic pole, the upper skeleton magnetic pole, the permanent magnet, the magnetorheological rubber and a movable axis, and the magnetorheological grease is filled into the seal cavities. Because the traditional rubber is replaced by the magnetorheological rubber, by using the long-period absorption effect of the movable axis by the magnetorheological rubber under the action of a magnetic field, a gap caused by the abrasion between the magnetorheological rubber and the movable axis and the failure for the elastic deterioration of the magnetorheological rubber can be compensated, and the self-healing seal function of the magnetorheological rubber is realized.

Description

technical field [0001] The invention relates to a mechanical engineering sealing device, in particular to a sealing device for a reciprocating mechanism of a suspension shock absorber used in high-speed rail vehicles and heavy-duty ground wheeled vehicles, as well as ship propellers, helicopter rotors, wind power generation equipment and high-vacuum equipment A self-healing sealing device and a reciprocating mechanism based on magnetorheological rubber and magnetorheological grease for the sealing of the rotating mechanism. Background technique [0002] At present, the seals mainly include rubber seals and magnetic liquid seals, which are used for sealing in the annular gap between the shaft and the housing. Rubber seals are usually thermally bonded rubber to the metal ring. Because rubber has the advantages of high elastic polymer material properties and wide temperature range, it is widely used in static sealing. But for the dynamic seal, especially in the reciprocating m...

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Problems solved by technology

[0006] The present invention aims at the problem of sealing failure and leakage caused by the sealing gap of the existing rubber sealing body due to factors such as rubber aging and wear, and the problem of sealing failure and leakage of the magnetic sealing body caused by the low shear strength of the magnetic liquid. A dynamic seal that can not only achieve long-term reliability in the environment of high pressure difference and high operating spe

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