锻造操作机提升俯仰系统平降下滑问题的分析  

Analysis of Lifting Cylinder Sliding Problem in Raising and Pitching System of Forging Manipulator

作　　者：冀宏[1] 陆海娇[1] 何琪功 赵晓峰 

机构地区：[1]兰州理工大学能源与动力工程学院,甘肃兰州730050 [2]兰州兰石重工有限公司,甘肃兰州730050

出　　处：《机床与液压》2014年第7期111-114,共4页Machine Tool & Hydraulics

基　　金：甘肃省科技支撑计划项目(1011GKCA041)

摘　　要：针对锻造操作机提升俯仰系统平升缸停止时刻短时下滑问题,运用AMESim软件建立液控单向阀及提升俯仰液压系统仿真模型并进行仿真分析,分析了系统中液控单向阀卸荷小阀芯、主阀芯以及控制活塞的瞬态运动特性。结果表明:油缸下滑是由于液控单向阀不能即时关闭所致,液控单向阀关闭过程中,控制活塞复位缓慢,给阀芯复位造成一定阻力,使阀芯不能立即复位。通过增大控制活塞复位弹簧的刚度可使活塞复位迅速,液控单向阀可立即关闭,有效解决油缸下滑问题。The simulation models of the pilot-operated check valve and the hydraulic system were built and simulated with analy- sis by using the AMESim software aimed at the problem of lifting cylinder sliding in raising and pitching system of forging manipulate briefly at stop. The momentary dynamic characteristics of the decompression poppet, the main poppet and the pilot piston of the check valve in system were analyzed. The results show that the pilot-operated check valve cannot close in time is the reason for sliding of the lifting cylinder. In the process of the valve closing, the pilot piston reset slowly, which added resistance to the poppet reset, led to the poppet not reset at once. By increasing reset spring stiffness of the pilot piston made the pilot piston reset quickly, the valve closes im- mediately, and it can solve the sliding problem efficiently.

关 键 词：锻造操作机 提升俯仰系统 下滑现象 液控单向阀 

分 类 号：TH137[机械工程—机械制造及自动化]