冲击载荷作用下液压支架立柱液压系统特性研究

Study on Hydraulic System Characteristics of Hydraulic Support Column under Impact Load

为了解决液压支架立柱受采场冲击载荷易于损坏的问题,利用AMESim仿真软件在构建立柱液压系统中的立柱模型、大流量安全阀模型和重锤模型的基础上,建立了立柱液压系统的冲击模型;按照国家对煤矿液压支架试验要求,对立柱进行冲击试验,研究了立柱液压系统的冲击响应特性,得到了立柱缸体内部乳化液压力峰值及变化曲线,得出在冲击载荷作用下需要加强液压支架立柱二级缸缸体强度、液压支架立柱系统达到压力峰值的响应时间与冲击质量和重锤下落高度存在一定关系等结论,从而为采煤工作面供液系统设计和液压支架设计提供重要依据。

In order to solve the problem that the hydraulic support pillar is easy to be damaged under the stope impact load,the impact model of the pillar hydraulic system is established based on the establishment of pillar model,large flow safety valve model and the weight hammer model in AMESim simulation software.According to the national test requirements for coal mine hydraulic support,the pillar impact tests are carried out,and the impact response characteristics of the hydraulic system of the column are studied.The peak emulsified hydraulic pressure and its variation curve is obtained.The conclusion is that,under the impact load,the strength of the secondary cylinder block of the hydraulic support pillar needs to be strengthened,and the response time of the hydraulic support pillar system to the peak pressure has a certain relationship with the impact quality and the drop height of the weight hammer,which provides an important basis for the design of liquid supply system and hydraulic support in coal mining face.