摘要
平衡千斤顶是两柱掩护式液压支架的重要调控部件,常规双向锁控制模式易造成安全阀频繁喷液,不能很好适应自动化控制要求。利用AMESim软件建立了某两柱掩护式液压支架刚-液平面运动模型,模拟移架前后顶板5°倾角变化条件,比较了传统双向锁控制模式和差动控制、低压控制和浮动双向锁控制模式下液压支架姿态和平衡千斤顶响应过程。结果表明:后3种控制模式均可有效避免安全阀开启,降压效果方面低压控制最优、浮动双向锁次之,差动控制有喷液风险;非主动调控模式下,差动控制和低压控制模式顶梁前端先接顶,浮动双向锁控制顶梁后端先接顶。研究结果为平衡千斤顶控制系统的选型和优化提供新参考。
Equilibrium jack is key control component of two column shield support,safety valve would frequency injecting with normal bidirectional lock control model,and it could not adapted automation control requirements Detailed rigid hydraulic plane motion model of tow column hydraulic shield support was built by software AMESim,the situation that roof variation with incline angle5°was simulated before and after support movement,and different hydraulic support pose and equilibrium jack response process were compared under different control models,which include normal bidirectional lock control model and differential action control model,low pressure control and floating bidirectional lock control model The results showed that the safety valve could be avoided frequency open under the later three control model,the best decompression result was low pressure control,the floating bidirectional lock control was the second,but inflecting hazard would appeared during differential control process,under passive control model,the leading end of top beam would approached roof under differential control and low pressure control,but the rear end of top beam would approached roof firstly under floating bidirectional lock control It references for model selection and optimization of equilibrium jack control system
作者
张德生
ZHANG De-sheng(Coal Mining & Designing Department,Tiandi Science & Technology Co ,Ltd ,Beijing 100013,China;Mining Institute,China Coal Research Institute,Beijing 100013,China)
出处
《煤矿开采》
北大核心
2017年第6期29-33,共5页
Coal Mining Technology
基金
国家自然基金(山西煤基低碳联合基金)重点支持项目(U1610251)
关键词
刚-液平面运动模型
平衡千斤顶
控制模式
两柱液压支架
rigid hydraulic plane motion model
equilibrium jack
control model
two column hydraulic support
作者简介
张德生(1982-),男,江苏丰县人,博士,副研究员,主要研究方向为矿山支护理论与装备
