大采高掩护式液压支架支护性能仿真研究

Simulation Study on Support Performances of High Cutting Shield Type Hydraulic Powered Support

为提高大采高掩护式液压支架的工程应用性能,介绍了双伸缩立柱的支护特征,构建了掩护式液压支架支撑升架到恒阻阶段的Simhydraulics参数化仿真实物模型,并对赋值后的参数化模型进行仿真。仿真结果表明:在外载作用下,安全阀按调定压力开启溢流,中缸压力随外缸压力变化,并在安全阀开启后保持恒定;从理论上分析了降柱时能量对液压支架液压系统和元器件设计的影响,同时验证了设置2个大流量安全阀的理论依据、平稳转动操作手柄对降柱的必要性和压缩后高压乳化液形成的能量对立柱可靠性的影响,为液压支架使用和设计提供了理论参考。

In order to improve the engineering applied performances of the high cutting shield type hydraulic powered support, the paper in- troduced the support features of the double-telescopic leg.From the support lifting to constant resistance stage, a parameter physical model of the field type hydraulic powered support system was estabiished.A simulation was conducted on the parameter model after the valuation. The results showed that under an external load role,according to the pre-set pressure, the safety valve would be opened for overflow and the pressure in the middle cylinder would be varied with the pressure of the outer cylinder and would be kept in constant after the safety valve opened.Theoretically the paper analyzed the energy when the leg lowed down affected to the design of the hydraulic system of the hy- draulic powered support and the element parts. Meanwhile the theoretical basis of the two large flow safety valves, the necessity of the smooth rotary operation handle to the leg lowing down and the energy created from the high pressure emulsion after compressed affected to the reliability of the leg were verified and could provide the theoretical references to the application and design of tile hydraulic powered support.