某型平衡阀流量特性改进研究  

Improvement Research on the Flow Characteristics of a Balance Valve

作　　者：郭小强[1] 张佳林[1] 陈奇[1] 

机构地区：[1]北京航天发射技术研究所,北京100076

出　　处：《机床与液压》2017年第22期97-100,共4页Machine Tool & Hydraulics

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。A four-stage hydraulic cylinder is used as the actuator in a large tonnage erect and withdraw hydraulic system. When changing its stage,the multi-stage cylinder has a impact phenomenon because of the mutations of its area. Since the rod chamber of the multi-stage cylinder without a throttling and cushioning structure,so a method of controlling the balance valve throttling is used to ease the impact. The throttling flow characteristics of the balance valve directly affect the stability of the withdraw hydraulic system. A main spool structure with a multi-area gradient was proposed through the theoretical calculation and the simulation analysis of AMESim. The effect of pressure drift on the opening of the main valve was solved. The correctness of this structure is verified by the valve and system test. The inconsistent problem of the opening of the balance valve is eliminated,the state consistency of the volume production is ensured,the fault tolerance of the balance valve to characteristic change of the system is improved effectively.

关 键 词：平衡阀 流量特性 回收时间 仿真分析 

分 类 号：TH137.5[机械工程—机械制造及自动化]