滚珠丝杠压扭型2D电液比例方向阀动态特性研究

发布时间：2018-05-01 08:18

本文选题：D阀 + 压扭联轴器　；参考：《中国机械工程》2017年17期

【摘要】：提出了一种滚珠丝杠型压扭联轴器,该联轴器能将输出力放大约20倍,有效地解决了因比例电磁铁磁饱和造成直动比例方向阀无法实现大流量的问题。该联轴器将2D方向阀和比例电磁铁相连接,利用压扭放大驱动技术,将电磁力转化为阀芯左右两端不平衡的液压力,以克服摩擦力、卡紧力和液动力等非线性因素的影响。对主阀P-A处与导控级的压力分布和流场分布进行了仿真分析,理论与实验研究表明:压扭联轴器有效地放大了电磁力,在流量约为210L/min的情况下,阀的阶跃响应约为0.35s,该阀-90°频率为4Hz左右。叠加一定颤振对改善阀的阶跃响应不明显,但能较好保证阀芯位移与电磁铁位移之间的跟随性。
[Abstract]:A ball screw type pressure-torsion coupling is proposed. The coupling can amplify the output force by about 20 times, effectively solving the problem that the direct proportional directional valve can not realize the large flow rate due to the proportional magnet saturation. The coupling connects 2D directional valve and proportional electromagnet and converts electromagnetic force into unbalanced liquid pressure at the left and right ends of the valve core by using pressure-torsional amplification drive technology to overcome the influence of nonlinear factors such as friction force, clamping force and hydraulic force. The pressure distribution and flow field distribution at P-A and guide stage of the main valve are simulated and analyzed. The theoretical and experimental results show that the pressure and torsional coupling amplifies the electromagnetic force effectively, and the flow rate is about 210L/min. The step response of the valve is about 0.35s, and the frequency of the valve is about 4Hz. The superposition of certain flutter is not obvious to improve the step response of valve, but it can ensure the followability between the displacement of valve core and the displacement of electromagnet.
【作者单位】：浙江大学城市学院工程学院;浙江工业大学特种装备制造与先进加工技术教育部重点实验室;
【基金】：国家自然科学基金资助项目(51605430)
【分类号】：TH137.52

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