Multi-disc type radial flowing magneto-rheological valve with annular grooves

Abstract

The invention discloses a multi-disk radial flow magneto-rheological valve with annular grooves, which comprises a support wheel, a magnetically conductive end cover, a damping disc, a magnetic isolation ring, an exciting coil, a sealing ring and a sleeve. A plurality of damping discs are arranged at intervals to form a plurality of damping gaps, which effectively increases the length of the damping gaps. When a certain amount of current is input into the excitation coil, a gap perpendicular to the flow direction of the magnetorheological fluid is generated in the gaps between the damping discs. Magnetic field, the magnetorheological fluid in each damper changes from liquid to semi-solid instantaneously, so as to obtain a large pressure difference between the inlet and outlet. In addition, an annular groove is formed on the surface of each damping disc, thereby avoiding the wall slip of the magneto-rheological fluid and the damping disc, and enhancing the damping effect. The magneto-rheological valve makes full use of the magnetic field, and has a large adjustment range of the pressure difference between the inlet and outlet, and is suitable for a hydraulic servo control system with relatively large pressure adjustment requirements.

Description

technical field [0001] The invention relates to a magnetorheological valve, in particular to a multi-disk radial flow magnetorheological valve with annular grooves. Background technique [0002] In the absence of a magnetic field, the magnetorheological fluid behaves as a low-viscosity, high-fluidity Newtonian fluid, and under the action of an external magnetic field, it can quickly and reversibly transform into a high-viscosity, low-fluidity Bingham viscoplastic body , and when the applied magnetic field strength increases to a certain value, the magnetorheological fluid will transform into a solid-like state with a higher shear yield strength. However, before the shearing of the column-like microstructure in the magnetorheological fluid in the direction of the magnetic field occurs, there is relative motion between the ferromagnetic particles in the magnetorheological fluid and the transmission wall. This phenomenon is wall slip, reducing Minimizing or even avoiding wall ...

AI Technical Summary

Problems solved by technology

However, when the width of the damping gap is too small, the damping gap will be blocked, and the width of the damping gap needs to be adjusted by turning the valve core, which is inconvenient to control and adjust the inlet and outlet pressure of the magneto-rheological valve.

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