Magnetorheological damper with complex liquid flow passage structure

Abstract

The invention discloses a magnetorheological damper with a complex liquid flow passage structure. The magnetorheological damper is mainly composed of a piston rod, damper end covers, a damper cylinderbody, a magnet exciting coil, a piston head left end cover, a piston head right end cover, a piston head and the like. A complex liquid flow passage is formed by gaps defined by the piston head leftend cover, the piston head right end cover and the piston head in an enclosed mode, wherein four effective damping gaps are composed of the axial ring type damping gap I, the axial ring type damping gap V, the radial disc type damping gap II and the radial disc type damping gap III. When the magnet exciting coil is powered on, a definite-size magnetic field is generated in the four effective damping gaps, so that the shearing area and the effective damping length of the damping passage are increased. By the adoption of the complex flowing type liquid flow passage structure, the output dampingforce and the damping force adjustable range of the damper are further improved on the premise of not changing the radial and axial sizes of the damper, and the damper is particularly suitable for vibration isolation systems in the industries of railway, traffic and the like.

Description

technical field [0001] The invention relates to a magnetorheological damper, in particular to a magnetorheological damper with a complex liquid flow channel structure. Background technique [0002] The magnetorheological damper is a new type of semi-active damping device based on the controllable characteristics of magnetorheological fluid. It has the advantages of simple structure, fast response, low power consumption, large damping force and continuous adjustment. At present, magnetorheological dampers have been widely used in vibration and anti-seismic systems of buildings and bridges, railway rolling stock and automobile suspension systems, etc. [0003] In the vibration control system, the magnetorheological damper is mainly used to control the vibration generated by the system components to meet the requirements of various mechanical equipment for various working conditions. Therefore, the performance of the magnetorheological damper directly affects the static and dy...

AI Technical Summary

Problems solved by technology

With the development of high technology, the engineering application of vibration damping system has higher and higher requirements for damping components. Most of the existing magnetorheological dampers are single-channel shear dampers. The flow resistance channel is mainly set inside the coil and between the coil and the sleeve. It is necessary to ensure that the direction of the magnetic field is perpendicular to the flow direction of the magnetorheological fluid, otherwise the best effect cannot be achieved; under this premise, the flow resistance channel must also be The area is as large as possible to obtain sufficient damping force, so its volume is generally relatively large, and the adjustable range of damping force is relatively narrow

[0004] The Chinese invention patent with the publication number CN205118104 U "a magneto-rheological damper with radial flow and circular flow damping channels" proposes a complex damper combined with a magneto-rheological damper and a magneto-rheological valve. The combination of the rheological valve and the magnetorheological damper realizes the complex magnetorheological fluid channel, but this structure has certain limitations. Due to the addition of the valve structure, the axial and radial dimensions of the damper become larger , resulting in bulky size of the whole damper

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