掩护式液压支架平衡控制回路补液系统设计分析  

Design and Analysis of Rehydration System for Shield Hydraulic Support Balance Control Circuit

作　　者：李志旭 王庭明 孟祥强 李会 曹连民[1] Li Zhixu;Wang Tingming;Meng Xiangqiang;Li Hui;Cao Lianmin(School of Mechanical and Electronic Engineering,Shandong University of Science and Technology,Qingdao 266590,China)

机构地区：[1]山东科技大学机械电子工程学院

出　　处：《煤矿机械》2019年第9期30-33,共4页Coal Mine Machinery

基　　金：国家虚拟仿真实验教学项目（201806022）;矿业工程国家级实验教学示范中心（山东科技大学）开放基金（KYSF20180206）

摘　　要：为解决因平衡千斤顶有杆腔和无杆腔供液不平衡造成的掩护式液压支架顶梁在抬头及低头姿态下冲击顶板造成顶板破碎的问题,通过研究ZFY12000/25/42/D型掩护式液压支架在不同状态下接顶时平衡千斤顶的动作原理,在现有液压系统上设计了补液回路,通过液控换向阀和单向阀完成自动补液。借助AMESim软件分析增加补液系统后平衡千斤顶有杆腔和无杆腔工作特性曲线、安全阀和液控换向阀的动作情况,并改造ZFY12000/25/42/D型掩护式液压支架平衡回路以验证补液系统的有效性。仿真及试验结果表明,控制回路因负载变化造成乳化液流失时能够及时进行补液,避免了平衡千斤顶因没有及时补液而没有足够的支撑力的问题,保证液压支架平稳安全动作。When the shield type hydraulic support balance jack has a rod cavity and a rodless cavity, the top beam is easy to impact the top plate in the up head or low head state, causing the top plate to be broken. In view of this problem, studied the ZFY12000/25/42/D type shield hydraulic support to balance the action of the jack when it is connected in different states, and designs the rehydration system based on the original balance control loop. The automatic rehydration of the balance jack was completed by the two-position three-way hydraulically controlled reversing valve and the one-way valve. With the help of AMESim software, the balance function of the rod and the rodless chamber of the balance jack after the addition of the rehydration system,and the operation of the safety valve and the hydraulically controlled reversing valve were analyzed. Field tests were conducted on the ZFY12000/25/42/D type shield hydraulic supports to verify the effectiveness of the rehydration system. The simulation and test results show that the control circuit can replenish the liquid in time due to the loss of the emulsion due to the load change, which avoids the problem that the balance jack does not have enough supporting force due to the lack of timely rehydration, and ensures the smooth and safe movement of the hydraulic support.

关 键 词：掩护式液压支架 平衡千斤顶 补液系统 AMESIM 支护性能 

分 类 号：TD355.4[矿业工程—矿井建设]