Experiment on pressure response in the hydraulic system based on two loading components

WU Zhen-song;GU Li-chen;LIU Yong;CHEN Meng;YANG Bin;School of Mechanical Engineering,Chang′an University;School of MechanicalElectronic Engineering,Xi′an University of Architecture and Technology;School of Mechanical Engineering,Hubei University of Automotive Technology;

electromagnetic proportional relief valve;;magnetic powder brake;;load characteristics;;hysteresis

【Objective】To analyze loading characteristics of electromagnetic proportional relief valve and magnetic powder brake in the same mechanical electrical and hydraulic system.【Method】In the same electrical fluid,stimulation loading experiment of the two kinds of components was conducted in the pump-control-motor hydraulic pressure system to analyze their dynamic and static response properties.【Result】The results showed that under the same working conditions,magnetic powder loading sensitivity was13.6 MPa/V,voltage dead area of loading control was 8.33%,lag time in dynamic response was 1.5s,the maximal lag error was 0.96 MPa and the maximal overshoot volume was 35 %.Electromagnetic proportional relief valve loading had lower sensitivity of 2.12 MPa/V,larger voltage dead area of loading control of 28.9%,longer lag time in dynamic response of 4.8s,furthermore it had the following significant advantages including smaller maximal lag error of 0.2 MPa and the maximal overshoot volume of 6.25 % and stronger anti-jamming capacity.【Conclusion】The results would provide reference data for choosing suitable loading components under laboratory conditions according to actual conditions and load characteris-tics.