某型平衡阀流量特性改进研究

发布时间：2018-04-17 03:14

本文选题：平衡阀 + 流量特性　；参考：《机床与液压》2017年22期

【摘要】：在某大吨位起竖回收液压系统中,采用四级液压缸作为起竖回收的执行机构,多级液压缸在换级时因面积突变会产生冲击现象。由于该多级缸的反腔无节流缓冲结构,因此采用控制平衡阀阀口节流的方法来减速实现缓解冲击,平衡阀在节流时的流量特性直接影响到系统回收的稳定性。通过理论计算及AMESim仿真分析,提出一种多面积梯度的主阀芯结构,实现了主阀芯在一定压力范围内稳定的开启面积,解决了压力、温漂对主阀芯开启的影响。经单机及系统试验验证正确,消除了平衡阀开启不一致的问题,保证了平衡阀量产的状态一致性,有效提高了平衡阀对系统特性变化的容错能力。
[Abstract]:In a large tonnage vertical recovery hydraulic system, the four-stage hydraulic cylinder is used as the actuating mechanism of vertical recovery. When the multi-stage hydraulic cylinder is changed, the sudden change of area will produce the phenomenon of impact.Because the multi-stage cylinder has no throttling buffer structure, the throttling method of balancing valve is adopted to slow down and mitigate the impact. The flow characteristics of the balancing valve in throttle have a direct impact on the stability of the system recovery.Through theoretical calculation and AMESim simulation analysis, a multi-area gradient structure of the main valve core is proposed, which realizes the stable opening area of the main valve core within a certain pressure range, and solves the influence of pressure and temperature drift on the opening of the main valve core.It is proved by single machine and system test that the problem of balance valve opening inconsistency is eliminated, the state consistency of balance valve mass production is ensured, and the fault-tolerant ability of balance valve to system characteristic change is improved effectively.
【作者单位】：北京航天发射技术研究所;
【分类号】：TH137.52

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