Method for Improving Damping Force of Squeeze-Type Magnetorheological Fluid Passive Vibration Isolator and Vibration Isolator

Abstract

The invention discloses a method for improving the damping force of an extrusion magnetorheological fluid passive vibration isolator and a vibration isolator. Multiple chambers are formed by arranging the magnetic poles of multiple permanent magnet sheets containing through holes in different directions. On adjacent magnet sheets, The through holes are staggered; the magnetorheological fluid flows into or out of the chamber through the through holes and squeezes the suspended particles to form a chain arrangement. The above chain arrangement under the magnetic field forms a strong impact on the magnetorheological fluid when it is squeezed. Blocking force, part of the magnetorheological fluid in the upper chamber is squeezed into the next chamber, and the sum of the blocking forces in the above chambers is the damping force of the squeezed magnetorheological fluid passive vibration isolator. . Advantages of the invention: It overcomes the shortcomings and deficiencies of the existing semi-active magnetorheological damper such as low stiffness during operation, rapid loss of damping in case of sudden power supply failure, dependence on electric energy, and poor heat dissipation ability of corresponding working parts.

Description

technical field [0001] The invention relates to a passive device, in particular to a structural design of a passive vibration isolator using intelligent magnetorheological materials and having speed-magnetic field strength dependence. Background technique [0002] Magnetorheological fluid is a new type of intelligent material with controllable rheological properties. It has good fluidity when there is no external magnetic field, and after an external magnetic field is applied, magnetorheological fluid can change from The state of disorderly distribution of magnetic particles transforms into a chain or columnar microstructure along the direction of the magnetic field, which increases the apparent viscosity by more than two orders of magnitude and presents solid-like mechanical properties. Generally, the semi-active magnetorheological damper uses magnetorheological fluid as the working fluid of the damper, and a multi-turn coil is wound on the piston of the damper. The magneti...

AI Technical Summary

Problems solved by technology

[0003] In order to overcome the defects and deficiencies of the existing semi-active magneto-rheological damper, such as low stiffness during operation, sharp loss of damping when sudden power supply failure occurs, dependence on electric energy, and poor heat dissipation of corresponding working parts, the present invention proposes an extrusion Compression type magnetorheological fluid passive vibration isolator, the specific technical scheme is as follows:

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