射流管伺服比例阀前置级流量的影响因素研究

发布时间：2018-05-11 20:05

本文选题：射流管伺服阀 + 先导级流量　；参考：《机械科学与技术》2017年07期

【摘要】：射流管喷嘴与接收器之间的流场存在淹没射流等复杂的流动情况,导致流场特性不易预测。在喷嘴形状为矩形的情况下,通过对矩形接收孔和圆形接收孔的射流管伺服比例阀前置放大器进行流场数值仿真,得到了喷嘴位移、接收孔与喷嘴的重合面积、射流管入口压力以及负载对先导级流量的影响。通过比较,发现先导级流量与射流管入口与出口的压差的开方成正比关系,喷嘴位移、接收孔与喷嘴的重合面积以及负载大小对先导级流量的影响较小。建立了射流管流场的等效液压桥路,推导出了先导级流量的方程,并通过泰勒展开式分析了影响先导级流量的因素。提出了流量接收率的概念,并分析了流量接收率对先导级流量的影响。
[Abstract]:The flow field between the nozzle and receiver of the jet tube is complicated by submerged jet, which leads to the difficulty of predicting the characteristics of the flow field. When the nozzle shape is rectangular, the flow field of the preamplifier of the jet tube servo proportional valve with the rectangular receiving hole and the circular receiving hole is simulated, and the displacement of the nozzle and the coincidence area between the receiving hole and the nozzle are obtained. The influence of the inlet pressure and load of the jet tube on the flow rate of the pilot stage. By comparison, it is found that the pilot stage flow is proportional to the pressure difference between the inlet and outlet of the jet pipe, and the displacement of the nozzle, the coincidence area between the receiving hole and the nozzle, and the load size have little effect on the pilot stage flow. The equivalent hydraulic bridge of the flow field of the jet pipe is established, the equation of the leading stage flow is derived, and the factors affecting the pilot stage flow are analyzed by Taylor expansion. The concept of traffic reception rate is put forward and the influence of traffic reception rate on pilot stage flow is analyzed.
【作者单位】：武汉科技大学机械自动化学院;
【基金】：国家自然科学基金项目(51475338) 湖北省自然科学基金项目(2014CFA013)资助
【分类号】：TH137.52

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