巷道临时支护支架推移油缸液压同步系统设计

针对巷道临时支护支架的推移油缸在工作面工作过程中承受的偏载,设计了负载敏感系统与同步阀相结合的液压同步系统,使得推移油缸在承受偏载下也能达到较高的位移同步精度;使用AMESim仿真软件对该液压同步系统进行了建模和仿真分析,得到推移油缸的位移同步精度为0.68%;搭建了推移油缸液压同步系统的试验台,在推移油缸承受偏载下对液压同步系统进行了试验研究和分析,得到该系统推移油缸位移同步精度为1.32%,满足1.5%以内的设计目标。研究结果表明:负载敏感系统结合同步阀能在油缸承受偏载时抑制压力和流量的波动,保证流量不变,使得油缸同步运行,同时具有调速方便和节能的优点。

Hydraulic Synchronous System Design for Temporary Support Pushing Cylinders

In view of the unbalance load of laneway temporary hydraulic support, the hydraulic synchronous system is designed for pushing cylinders to achieve high displacement synchronous precision under unbalance loading condition. The hydraulic synchronous system is the combination of the load-sensing system and the synchronous valve. AMESim model of the pushing cylinders hydraulic synchronous system based on the combination is built. The synchronous precision is 0.68% in the simulation when pushing cylinders bear unbalance load. Based on the hydraulic synchronous system test program which designed in this study, a testbed of the hydraulic synchronous system is set up. The result of the test of the hydraulic synchronization system shows that the pushing cylinders’ displacement synchronization precision is 1.32%, which can achieve the design objective within 1.5%. The results show that the combination of the load-sensing system and the synchronous valve can restrain the fluctuation of pressure and flow when cylinders are subjected to unbalance load, and ensure pushing cylinders operate synchronously. At the same time it has the advantages of speed regulation conveniently and energy conservation.