出口节流调速系统负载变化对液压缸压力的影响  

The Effect of the Variable Load on the Pressure of Hydraulic Cylinder in the Metering-out Control System

作　　者：李志红[1] 陈继文[2] 

机构地区：[1]厦门理工学院机械工程系,福建厦门361024 [2]山东建筑大学机电工程学院,济南250101

出　　处：《江西理工大学学报》2010年第5期24-28,共5页Journal of Jiangxi University of Science and Technology

基　　金：国家"十一五"科技支撑项目(2006BAD11A07-2)

摘　　要：在出口节流调速系统中,负载的变化特别是阶跃变化,液压缸两腔压力会发生动态变化,使活塞(杆)的速度产生波动,以及系统中液压元件主参数选择不当,出现液压元件损坏,影响液压系统的正常工作.通过试验,使负载发生阶跃变化,利用压力传感器测量液压缸两腔压力变化,特别是压力超调量的变化,得到了压力超调量的变化规律,并利用压力变化的动态特性,对系统中选取液压元件额定压力的计算公式进行了修正,为液压元件的选择提供一种思路.In the metering-out control system,the pressure of hydraulic cylinder chambers would change dynamically when the load or step load changes,then the velocity of the cylinder rod would fluctuate,and the hydraulic elements would be damaged because of principal parameters′ being selected inappropriately.All those would influence the hydraulic system to work normally.The pressure of hydraulic cylinder chambers,especially the highly-adjusted capacity of pressure is measured by pressure sensors in the test.Then the law for the highly-adjusted capacity of pressure is obtained.The formulas of choosing hydraulic elements′ rated pressure are modified to offer a way to select hydraulic elements.

关 键 词：出口节流调速 阶跃负载 液压缸 液压元件 参数 选择 

分 类 号：TH137.32[机械工程—机械制造及自动化]