液压支架双伸缩立柱落锤冲击特性仿真分析  

Simulation Analysis of Drop Hammer Impact Characteristics of Double Telescopic Column of Hydraulic Support

作　　者：王存飞 Wang Cunfei(Shendong Coal Group Co.,Ltd.,CHN Energy Group,Yulin 719000,China)

机构地区：[1]国家能源集团神东煤炭集团有限责任公司,陕西榆林719000

出　　处：《煤矿机械》2023年第5期79-82,共4页Coal Mine Machinery

摘　　要：为掌握冲击载荷作用下液压支架立柱及其安全阀的冲击特性及流量匹配规律,在分析落锤冲击载荷及立柱结构的基础上,以某型液压支架双伸缩立柱为例建立了其落锤冲击模型及AMESim仿真模型,并对其冲击特性进行了分析。研究结果表明:在冲击载荷作用下,活柱由于底阀的存在无法实现位移缩让,在介质压力能的作用下会形成上下振动,中缸由于安全阀可以产生较大的瞬间冲击流量实现缩让,不易形成位移振动;而当存在2次冲击时,第2次冲击产生的立柱冲击压力比第1次冲击产生的压力大;且随着安全阀流量压力梯度的增加,大缸及中缸的第1次冲击压力都是逐渐减小,而第2次冲击压力存在先减小后增大的趋势。In order to master the impact characteristics and flow matching law of hydraulic support column and its safety valve under impact load,based on the analysis of drop hammer impact load and column structure,taking a double telescopic column of a hydraulic support as an example,the drop hammer impact model and AMESim simulation model were established,and its impact characteristics were analyzed.The results show that under the impact load,the movable column cannot realize displacement yield due to the existence of the bottom valve,and will form up and down vibration under the action of medium pressure energy,while the middle cylinder is not easy to form displacement vibration because the safety valve can produce large instantaneous impact flow;When there are two impacts,the impact pressure generated by the second impact is greater than that generated by the first impact;With the increase of the flow pressure gradient of the safety valve,the first impact pressure of the large cylinder and the middle cylinder decreases gradually,while the second impact pressure decreases first and then increases.

关 键 词：双伸缩立柱 冲击 落锤 流量压力梯度 冲击压力 

分 类 号：TD355[矿业工程—矿井建设]