Abstract：In order to find out the factors that interfere with the normal operation of the deflector jet servo valve, the flow field between the jet nozzle of the pre-stage deflector jet servo valve and the V-groove of deflector plate is analyzed.Based on the momentum theorem, the mechanical model of pre-stage V-groove bevel under impact is established, and the relation between the pre-stage flow force and the displacement of the deflector plate is determined. To overcome the difficulty of the measurement of the pre-stage deflector jet servo valve flow force, a high-precision pre-stage flow force test bed is designed. Based on this test bed, a specific flow force test method is adopted. Finally, indirect measurement on the pre-stage deflector jet servo valve flow force can be achieved. The results show that the test values of the pre-stage flow force consist with the calculated values.The flow force of V-groove under incline impact increases with the increase of the displacement of deflector plate, which proves the feasibility of the calculation method and the test bed. This will provide references for the structure design and parameter optimization of this kind of servo valve.
李竞,延皓,董立静,李磊. 偏导射流阀前置级液动力试验台设计与研究[J]. 北京交通大学学报, 2018, 42(6): 119-.
LI Jing, YAN Hao, DONG Lijing, LI Lei. Design and research of flow force test bed for pre-stage on deflector jet servo valve. Beijing Jiaotong University, 2018, 42(6): 119-.