管路体积模量对液压支架立柱缸动态特性的影响  

Effect of Pipeline Volume Modulus on Dynamic Characteristics of Column Cylinder for Hydraulic Support

作　　者：仉志强 李永堂[1] 赵雄鹏 任静茹 赵红梅 ZHANG Zhi-qiang;LI Yong-tang;ZHAO Xiong-peng;REN Jing-ru;ZHAO Hong-mei(Shanxi Key Laboratory of Metallic Materials Forming Theory and Technology,Taiyuan University of Science and Technology, Taiyuan,Shanxi 030024;Technology Centre,Shanxi Pingyang Industry Machinery Co.,Ltd.,Houma,Shanxi 043003;School of Material Science and Engineering,Taiyuan University of Science and Technology,Taiyuan,Shanxi 030024)

机构地区：[1]太原科技大学金属材料成形理论与技术山西省重点实验室,山西太原030024 [2]太原科技大学机械工程学院,山西太原030024 [3]山西平阳重工机械有限责任公司技术中心,山西侯马043003

出　　处：《液压与气动》2018年第12期65-68,共4页Chinese Hydraulics & Pneumatics

基　　金：山西省煤基重点科技攻关项目(MJ2014-07)

摘　　要：大采高液压支架的供液管路的工作压力为23～32. 5 MPa,通流直径为38～60 mm,管路长度约1000～1500 m,管路体积模量使供液管路具有压力明显、流量响应滞后现象,导致液压支架系统速度、位移动态响应差。以液压支架大通径高压供液管路为试验对象,当压力为5～25 MPa时,管路体积模量值1300MPa,依据公式得到胶管体积模量约为恒定值2700 MPa,与乳化液体积模量接近。建立了AMESim管路模型和液压支架系统模型。仿真结果表明,供液管路体积模量越小,立柱位移、速度和压力响应越慢;当管路体积模量为1300 MPa时,立柱位移、速度和压力响应时间分别为0. 1 s,0. 2 s,0. 05 s,立柱缸响应滞后较明显。The working pressure of emulsion supply pipeline for large mining height hydraulic support is about 23-32.5 MPa,the diameter of the pipeline is 38-60 mm and the length is 1000-1500 m.The pipeline volume modulus makes liquid supply pipeline have obvious pressure and flow response lag effect,resulting in poor dynamic response of speed and displacement of hydraulic support system.The volume modulus of pipeline is tested,and the result shows that when the pipeline pressure is 5-25 MPa,the pipeline volume modulus is 1300 MPa.Based on the experimental data,the volume modulus of rubber hose is about 2700 MPa,which is close to emulsion volume modulus.An AMESim pipeline model and a hydraulic support system model are established.The simulation results show that the smaller the pipeline volume modulus,the slower the column displacement,velocity and pressure.When the pipeline volume modulus is 1300 MPa,the response time of column displacement,velocity and pressure is 0.1 s,0.2 s and 0.05 s respectively.It indicates that the response lag effect of column cylinder is obvious.

关 键 词：液压支架 动态特性 响应速度 体积模量 

分 类 号：TH137[机械工程—机械制造及自动化] TG355[金属学及工艺—金属压力加工]