负载口独立控制系统主动防气穴控制研究  

Research on Active Cavitation Control of Independent Metering Control System

作　　者：程伟 刘凯磊 李宇 康绍鹏 陶扬 王友定 俞成涛 CHENG Wei;LIU Kailei;LI Yu;KANG Shaopeng;TAO Yang;WANG Youding;YU Chengtao(School of Mechanical Engineering, Jiangsu University of Technology, Changzhou Jiangsu 213001, China)

机构地区：[1]江苏理工学院机械工程学院,江苏常州213001

出　　处：《机床与液压》2021年第18期139-144,共6页Machine Tool & Hydraulics

基　　金：国家自然科学基金青年科学基金项目(51805228);江苏省高等学校自然科学基金研究项目(18KJB460010);江苏省科技计划社会发展项目(BE2018641);江苏省研究生科研与实践创新计划项目(SJCX20_0927)。

摘　　要：传统液压系统在主动型负载工况下,易出现气穴现象,从而造成压力波动、流量失控、气蚀等现象。以基于机液压差补偿的负载口独立控制系统为研究对象,简化液压系统原理图。为避免气穴现象,对进、出口节流特性进行分析,得到进、出口节流面积比μ的最小值。采用仿真软件AMESim,分别对负载口独立控制系统和负载敏感系统进行建模,并进行液压缸伸出工况和缩回工况仿真分析。结果表明:在负载敏感系统中,随着负载F的增大,进油腔的压力会低于0,即出现气穴现象;而在负载口独立控制系统中,通过改变进、出口面积比μ,可以实现进油腔的压力保持在设定的目标压力pm左右,从而避免气穴现象。In the traditional hydraulic system with external active load condition,the cavitation phenomenon is produced easily,resulting in pressure fluctuations,runaway flow,cavitation and other phenomena.The independent metering system based on mechanical hydraulic pressure compensation was taken as the research object,and the hydraulic system schematic was simplified.In order to prevent cavitation phenomenon,the throttle characteristics of the metering in and metering out orifice were analyzed,and the minimum area ratioμof metering in and metering out orifice was obtained.The simulation models of the independent metering system and load sensing system were built by using the simulation software AMESim,and the simulation analysis of the hydraulic cylinder extension and retraction working modes were carried out.The results show that in the load sensing system,the pressure of the inlet chamber falls below 0 with the increasing of the load F,which is called cavitation phenomenon;in the independent metering system,the inlet chamber pressure can be kept as the target pressure pm by changing the area ratioμof metering in and metering out orifice,as a result that the cavitation phenomenon can be prevented.

关 键 词：负载口独立控制 主动型负载 气穴现象 负载敏感 

分 类 号：V233.91[航空宇航科学与技术—航空宇航推进理论与工程]