High output MR damper

Abstract

The invention discloses a magneto-rheological damper which has high output, wherein a master cylinder barrel is connected with an upper and a lower end covers of the master cylinder, a piston rod of the master cylinder is inserted in the steel cylinder of the master cylinder through a sealing ring which is arranged on the end cover of the main cylinder, the invention also comprises an auxiliary cylinder inner barrel which is communicated with the master cylinder barrel through an upper and a lower channels, an auxiliary cylinder outer barrel which is sleeved on the auxiliary cylinder inner barrel, a plurality of auxiliary cylinder piston slabs and permanent-magnet slabs which are alternately sleeved on an auxiliary cylinder piston rod, the auxiliary cylinder piston rod is inserted in the auxiliary cylinder inner barrel through an auxiliary cylinder end cover, and a groove is opened on the auxiliary cylinder inner barrel and an excitation coil is winded on the groove. The damper greatlyimproves the proportion of the effective length under the condition that the whole length of the damping channel is determined, basically realizes that the full damping channel is effective, which are larger one time than the traditional shearing valve type magneto-rheological damper with the same size, and simultaneously the damper has great anti-settlement performance and fail-safe performance.

Description

technical field [0001] The invention relates to a magnetorheological damping device. The proposed large-output magnetorheological damper is an energy-dissipating and vibration-reducing device with good performance, which can be generally applied to high-rise building structures, large-span space building structures, bridge structures and Vibration control of other civil engineering structures. Background technique [0002] Magnetorheological fluid is a suspended liquid whose shear yield strength can change with the external magnetic field and has controllable rheological properties formed by dispersing fine soft magnetic particles in a carrier liquid with low magnetic permeability; under the action of a magnetic field, the magnetic The rheological fluid can achieve a reversible change from Newtonian fluid to Bingham semi-solid within milliseconds, and can return to its original state after the magnetic field is removed. The magnetorheological damper made of magnetorheologic...

AI Technical Summary

Problems solved by technology

However, the inverter magnetorheological damper needs to use the auxiliary gap to form a composite magnetic circuit. The magnetic circuit structure is relatively complicated, and it is difficult to actually manufacture it. However, the multi-stage assembled anti-settling magnetorheological damper cannot effectively demagnetize the permanent magnet. The minimum output of the damper is too large, the adjustable range of the damping force is too low, and the damping channels of the two types of dampers have a high proportion of ineffective length, the maximum output of the damper is greatly affected

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