Parallel multi-channel magnetorheological damper

Abstract

The invention discloses a parallel-connection multi-channel magnetorheological damper and relates to the technical field of devices for adjusting damping properties by changing fluid viscosity. The damper comprises a damping cylinder barrel, a piston assembly, a piston rod and a magnetorheological fluid, wherein the piston assembly comprises an iron core; the iron core is wound with an electromagnetic coil; the electromagnetic coil is sleeved with a magnetic isolation protection ring; a magnetic conductor is arranged at the lower end of the iron core; the upper end of the iron core and the lower end of the magnetic conductor are provided with an upper magnetic sealing cover and a lower magnetic sealing cover respectively; an inner damping sleeve and an outer damping sleeve are arranged between the upper magnetic sealing cover and the lower magnetic sealing cover; an outer piston ring is arranged at the outer end of the outer damping sleeve; an annular seam exists among the iron core, the magnetic conductor, the inner damping sleeve, the outer damping sleeve and the outer piston ring to form a parallel-connection magnetorheological fluid multichannel. The damper can obviously reduce damping force of the magnetorheological damper in a zero magnetic field state, and the damping force adjusting range of the magnetorheological damper is enlarged.

Description

technical field [0001] The invention relates to the technical field of devices for adjusting damping properties by changing fluid viscosity, in particular to a parallel multi-channel magneto-rheological damper. Background technique [0002] The magnetorheological damper is a new type of semi-active damping device based on the controllable characteristics of the magnetorheological fluid. It has the advantages of fast response, simple structure, small size, easy control and low energy consumption. It is an ideal vibration isolation device. , Anti-seismic device, has broad application prospects in the field of vibration control. [0003] The common magnetorheological damper winds the electromagnetic coil on the piston of the damper. A single annular channel is set on the piston or a single annular channel is set between the piston and the cylinder. During operation, the magnetorheological fluid flows from the annular channel The flow creates a damping force. When the electrom...

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Problems solved by technology

To increase the maximum damping force of the magnetorheological damper with the above structure, it can be achieved by increasing the inner diameter of the cylinder and reducing the gap of the annular channel, but this will lead to an increase in the damping force of the magnetorheological damper under the condition of zero magnetic field, which will affect the vibration Control effect

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