中国工程机械学报

为了研究ZY18000/25.5/50D型回撤端头掩护支架的动态特性，采用AMESim仿真软件建立液压系统回路模型，以实际支架作业特点设置模型参数。研究立柱升柱、降柱过程中液压缸泄露系数以及塞杆比值对立柱速度、位移、加速度、泄漏量等的影响。研究结果表明：立柱速度和加速度瞬时值以及波动范围随着泄露系数增加而降低，泄漏量随着泄露系数增加而增加，泄露系数为0.02时系统产生泄漏量最大为5.69 L/min；立柱位移、立柱速度和加速度瞬时值以及波动范围随着塞杆与活塞杆直径比值增加而增加，而泄漏量则表现出随着塞杆与活塞杆直径比值增加而降低的特点，塞杆与活塞杆直径比值为220/200组泄漏量最大值为4.04 L/min。研究内容可为液压支架系统研究提供参考。

In order to study the dynamic characteristics of ZY18000/25.5/50D backstop cover support, AMESim simulation software is used to establish the hydraulic system circuit model, and the model parameters are set according to the actual operation characteristics of the support.The influence of hydraulic cylinder leakage coefficient and rod ratio on column speed, displacement, acceleration and leakage during column lifting and lowering are studied.The results show that the instantaneous values of column velocity, acceleration and fluctuation range decrease with the increase of leakage coefficient, and the leakage amount increases with the increase of leakage coefficient.When the leakage coefficient is 0.02, the maximum leakage amount is 5.69 L/min.The instantaneous values of column displacement, column speed and acceleration and the fluctuation range increase with the increase of the ratio of plug rod to piston rod diameter, while the leakage decreases with the increase of the ratio of plug rod to piston rod diameter.The maximum leakage of the group with the ratio of 220/200 plug rod to piston rod diameter is 4.04 L/min.The research content can provide reference for the research of hydraulic support system.