Abstract
With the increasing number of cars, the demand for vehicle maintenance lifts is also increasing. The hydraulic valve is one of its core components, but there are problems with it such as inaccurate positioning and failure. In order to improve the service performance of vehicle maintenance elevators, a novel annular multi-channel magnetorheological (MR) valve structure was creatively proposed based on intelligent material MR fluid (MRF), and its magnetic circuit was designed. The influence of current, damping gap and coil turns on the pressure drop performance of the annular multi-channel MR valve was numerically studied and compared with ordinary type magnetorheological valve pressure drop performance through contrast and analysis. The influence of different loads and currents on the pressure drop performance of annular multi-channel magnetorheological valve was verified by experiments, and the reliability of numerical analysis results was verified. The results show that the single winding excitation coil is 321 to meet the demand. The pressure drop performance of the annular multi-channel magnetorheological valve is 5.6 times that of the ordinary magnetorheological valve. The load has little influence on the regulating range and performance of pressure drop of the MR valve. Compared with the common type, the pressure drop performance of the annular multi-channel MR Valve is improved by 3.7 times, which is basically consistent with the simulation results.
Highlights
Received: 11 November 2021A magnetorheological valve [1] is a kind of hydraulic control valve that uses a new intelligent material, magnetorheological fluid [2,3,4], as the working medium
In order to improve the pressure drop of the magnetorheological valve performance, In order improvecircuit, the pressure of the magnetorheological valvestructure performance, the theory of to magnetic designdrop an annular multi-channel MR valve was the theory of magnetic circuit, design an annular multi-channel valve structure was used
The magnetic conductivity material of the annular multi-channel MR valve structure is 45 steel, shown in area A1 of Figure 6a; the magnetic insulation material is stainless steel, shown in area A3 of Figure 6a; the coil is shown in area A2, A5 of Figure 6a, and the gap is shown in area A4 of Figure 6a
Summary
Received: 11 November 2021A magnetorheological valve [1] is a kind of hydraulic control valve that uses a new intelligent material, magnetorheological fluid [2,3,4], as the working medium. Mathematical models of annular and radial magnetorheological valves have been established, and the newly developed magnetorheological valves have been simulated and evaluated [9]. The valve consists of multiple damping channel structures, such as annular and radial ones, forming a flow path together, giving the valve a longer flow channel and effectively increasing the length of the effective flow channel. It can be found through simulation experiments that, When the outer diameter of the valve is 50 mm, the pressure drop value can be greatly increased to more than 2.5 MPa
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