Design and Pressure Drop Performance of Mixed Flow Channel Magnetorheological Valve

The present study proposes a novel design of a dual coil magnetorheological valve, incorporating disc and circular flow channels, to address the issues associated with low channel utilisation and limited adjustable range of pressure drop in the conventional magnetorheological valve. Firstly, the magnetic circuit design and calculation of the magnetorheological valve are conducted based on the dual-coil structure. Subsequently, electromagnetic simulation analysis is performed using COMSOL to investigate the distribution law of magnetic induction intensity in the working area of the magnetorheological valve under varying currents and runner gaps. Secondly, a mathematical model of the pressure drop of the dual coil magnetorheological valve with mixed flow channel is developed, and the effects of parameters such as flow gap, operating flow rate and current on the pressure drop characteristics are investigated. Results demonstrate that the adjustable pressure drop of the magnetorheological valve ranges from 0.421 to 10.391 MPa with an excitation current of 2.5 A and a flow gap of 1.5 mm, which effectively broadens the adjustable range of the pressure drop and the applicable working conditions.