A Multi-stage Adjustable Axial Squeeze Permanent Magnet Magnetorheological Damper

Abstract

The invention discloses a multi-stage adjustable axial extrusion permanent magnet magneto-rheological damper, relates to the technical field of intelligent materials and dampers, in particular to a permanent magnet multi-stage adjustable damper made of magneto-rheological fluid Magneto-rheological dampers in squeeze mode. The invention consists of a primary damping mechanism, a secondary damping mechanism and an axial extrusion adjustment mechanism. The primary damping mechanism includes a primary sleeve, a primary piston rod, a permanent magnet group, a primary sealing plate, a primary Sealing ring, magnetic isolation plate, middle spacer, connection spring, connection detection head and primary magnetorheological fluid; the secondary damping mechanism includes secondary sleeve, secondary piston rod, piston head, paired permanent magnets , Axial extrusion plate, axial push rod, secondary magnetorheological fluid. The one-stage damping structure of the present invention can realize five-stage damping force adjustment, and the two-stage damping mechanism in the axial extrusion mode can realize stepless damping force adjustment, so that the damper can be used in a wider range.

Description

technical field [0001] The present invention relates to the technical field of intelligent materials and dampers, in particular to a magnetorheological damper with multi-stage adjustable permanent magnets composed of magnetorheological fluid and axial extrusion mode of magnetorheological fluid, specifically a multi-stage adjustable magnetorheological damper. Adjustable axial extrusion permanent magnet magnetorheological damper. Background technique [0002] Magnetorheological fluid is a new type of magnetic functional material, which behaves as a Newtonian fluid with good flow when there is no external magnetic field, but under the action of an external magnetic field, it exhibits mechanical properties similar to solids, and the viscosity change is continuous and reversible, that is, once removed After the magnetic field, it becomes a flowable liquid again. The medium filled in the magnetorheological damper is magnetorheological fluid, which is an intelligent damper that ha...

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Problems solved by technology

When the coil is placed on the piston rod, the coil will generate a lot of heat during the process of passing current. Under such working conditions, the performance of the magneto-rheological damper will decrease and the expected effect will not be achieved; external coils can reduce Heat generation, but the external coil occupies a large space, which is not conducive to the installation and layout of the damper; as long as the magnetic field is generated by the electromagnetic coil, additional power supplies, switches, wires and other equipment are required. This type of damper is not suitable for harsh working conditions; generally Although the permanent magnet is built in to avoid heat generation, the magnetic field is fixed and cannot be adjusted, which greatly limits the scope of application of the damper

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