摘要
300MN模锻水压机分配阀的主阀开启力很大,开启力动态特性影响水压机控制精度。采用解析法建立水路系统动力学模型、框架系统动力学方程、动梁动力学方程、锻压行程主阀阀口压力差动态模型,最后建立水压机动梁驱动系统及主阀开启力动态机液耦合模型。基于MATLAB中SIMULINK仿真和现场试验研究表明,主阀开启力巨大且开启瞬间巨幅瞬变振荡,第一次振荡幅度巨大,随后振荡幅度迅速减小。开启度越大,开启力振荡时间越长。所以,必须采取相应控制策略确保水压机压制过程控制精度,并对分配阀芯的驱动机构进行优化设计。
The open force of the distributor spool＇s main valve of a 300MN die forging hydraulic press is great, its dynamics response characteristic can affect control precision of the hydraulic press. First, dynamics model of the waterway system and dynamics equation of the working house and the moving beam were established. Then, the dynamics mechanical-hydraulic coupling model of the moving beam＇s drive system and the main valve＇s open force were established. Simulation results by SIMULINK of MATLAB and field test results show that the open force is giant and transient with large amplitude at the moment of opening the valve. The first oscillation amplitude is large, then the oscillation amplitude is decreased quickly. The larger the open gap, the longer the oscillation time. Suitable control strategy must be adopted to ensure the control accuracy during forging, and the drive mechanism of the distributor spool must be optimized.
出处
《机械科学与技术》
CSCD
北大核心
2010年第3期416-420,共5页
Mechanical Science and Technology for Aerospace Engineering
基金
国家863高技术研究发展计划项目(2007AA04Z417)资助
关键词
模锻水压机
驱动系统
液压阀
主阀
开启力
die forging hydraulic press
driving system
hydraulic valve
main valve
open force
