阻尼间隙可调式磁流变阀压降特性实验研究

Experimental Study of Pressure Drop Characteristics of Magnetorheological Valve with Tunable Resistance Gap

传统的磁流变阀阀芯与阀体相对固定，阻尼间隙也不变，导致阀进出口压差变化范围有限。基于此，设计了一种新型阻尼间隙可调式磁流变阀，该磁流变阀的液流通道间隙可在1．0～2．0mm范围内机械可调。同时搭建了磁流变阀实验测试平台，并进行了相关性能测试实验，具体分析了阀进出口压降与阻尼间隙厚度、电流及外加负载之间的关系，且对比了多次实验结果，验证了该阀性能的稳定性。

The pressure drop at in and out ports of the magnetorheological valve( MRV) varies little as the resistance gap is not changed,and the MRV spool and the MRV body of a traditional MRV is relatively fixed. On basis of it,a novel MRV with a tunable resistance gap was proposed. The size of the resistance gap of flow pass in this MRV was tunable mechanically ranging from 1. 0 mm to2. 0 mm. At the same time,a MRV test rig was built up,and experimental tests were carried out on related performance. The relationships among the pressure drop at in and out ports of the MRV,width of resistance gap,applied current and loading cases were analyzed concretely. Experimental results are contrasted for several times,which verify the stability of the proposed MRV.