用于比例变量泵供液系统的预压阀组设计与仿真分析  

Design and simulation analysis on pre-charge valve group for hydraulic supply system of proportional variable pump

作　　者：黄周轩 刘赟清 张晓丽 王拴庆 王雪 钱宝旭 Huang Zhouxuan;Liu Yunqing;Zhang Xiaoli;Wang Shuanqing;Wang Xue;Qian Baoxu(Lanzhou LS Heavy Machinery Technology Co.,Ltd.,Lanzhou 730314,China;Key Laboratory of Intelligent Control of Metal Forming Equipment,Lanzhou 730314,China;Gansu Large Fast Forging Hydraulic Equipment Technology Research Center,Lanzhou 730314,China;Lanzhou Ls Group Co.,Ltd.,Energy Equipment Engineering Research Institute,Lanzhou 730314,China)

机构地区：[1]兰州兰石重工有限公司,甘肃兰州730314 [2]甘肃省金属塑性成形装备智能控制重点实验室,甘肃兰州730314 [3]甘肃省大型快锻液压设备技术创新中心,甘肃兰州730314 [4]兰州兰石集团有限公司能源装备研究院,甘肃兰州730314

出　　处：《锻压技术》2023年第7期162-169,共8页Forging & Stamping Technology

基　　金：兰州市科技计划项目(2022-2-1)。

摘　　要：设计一种用于快速锻造液压机组供液系统的预压阀组,当比例变量泵的摆角瞬时变化时,预压阀组根据设定压力及时调整阀芯开度,使供液压力保持在比例变量泵吸油的许用范围之内。为了验证预压阀组设计中阻尼孔直径、控制腔直径、弹簧刚度及预压力等关键参数对阀特性以及快速锻造液压机组液压供液系统供液压力的影响,利用AMESim液压仿真技术建立预压阀组及快锻压机比例变量泵供液系统的仿真模型,并根据样本与快锻压机测试参数对仿真模型的准确性进行验证。通过不同参数的仿真对比分析,得到阻尼孔、控制腔直径的选取直接影响着阀组的响应特性与系统的压力稳定性,而弹簧刚度及预压力则无明显影响等结论,并将结论应用到预压阀组的参数设计中。A pre-charge valve group for hydraulic supply system of rapid forging hydraulic unit was designed,and when the swing angle of proportional variable pump changed instantaneously,the pre-charge valve group adjusted the opening of valve core in time according to the set pressure,so that the hydraulic supply pressure remained within the allowable range of oil suction for the proportional variable pump.Then,in order to verify the influence of key parameters such as damping hole diameter,control chamber diameter,spring stiffness and pre-pressure in the design of pre-charge valve group on the valve characteristics and the hydraulic supply pressure of hydraulic supply system for rapid forging hydraulic unit,the simulation model of the pre-charge valve group and the hydraulic supply system with proportional variable pump for rapid forging press was established by the AMESim hydraulic simulation technology,and the accuracy of the simulation model was verified according to the samples and the test parameters of rapid forging press.Through the simulation and comparative analysis of different parameters,it is concluded that the diameters of damping hole and control chamber directly affect the response characteristics of valve group and the pressure stability of system,while the spring stiffness and the pre-pressure have no obvious impact,and the conclusion is applied to the parameter design of the pre-charge valve group.

关 键 词：快锻压机 比例变量泵 预压阀组 供液压力 阻尼孔直径 控制腔直径 

分 类 号：TH137[机械工程—机械制造及自动化]