摘要
针对传统锻造机械臂液压系统存在的能量浪费问题,本文以变量泵代替定量泵作为动力输出元件的液压系统,通过负载感应反馈控制方法,使液压系统能够实现自动控制,调节变量泵的输出压力和流量,达到节能减耗的目的,并加入压力补偿器以保证系统的压力稳定。通过理论计算和仿真结果表明,该液压系统不仅能够实现液压机械臂的基本动作要求,而且在不同外负载压力变化下,可以自动调节变量泵的输出压力,使回路中的最高压力和液压系统输出压力的压差保持在设定值2.4 MPa左右,而且外负载压力的变化,不会影响液压回路中的流量。该液压系统有效的减少了能源损耗,对工程应用具有一定的指导价值。
Aiming at the energy waste problem of the traditional forging arm hydraulic system,the variable pump is designed to replace the traditional quantitative pump as the power output element in the hydraulic system.The hydraulic system can automatically control the output pressure and flow rate of the variable pump by the method of load induction feedback control,and the pressure compensator is added to ensure the pressure stability of the system.In this paper,by combining theoretical calculation and simulation analysis,it is found that the hydraulic system can not only realize the basic operation requirements of the traditional hydraulic manipulator,but also automatically adjust the output pressure of the variable pump under different external load pressure changes,so that the difference between the maximum pressure in the loop and the hydraulic system output pressure always keeps at the set value 24 bar unchanged.At the same time,the change of external load pressure will not affect the flow rate in the hydraulic circuit.The hydraulic system can not only fulfill the requirement of work stably,but also achieve the goal of reducing energy waste.
作者
李永强
张继忠
姜媛媛
LI Yongqiang;ZHANG Jizhong;JIANG Yuanyuan(School of Electromechanic Engineering,Qingdao University,Qingdao 266071,China)
出处
《青岛大学学报（工程技术版）》
CAS
2020年第3期9-14,共6页
Journal of Qingdao University(Engineering & Technology Edition)
关键词
变量泵
负载感应
阀后补偿
节能
variable pump
load induction
compensation after valve
energy saving
