起竖液压系统设计与恒功率控制策略研究  

Hydraulic System Design and Constant Power Control Strategy of Erecting Mechanism

作　　者：何刘宇[1] 杨堃 萧辉 谢文建[1] 吴新跃[1] 李运华[2] HE Liu-yu;YANG Kun;XIAO Hui;XIE Wen-jian;WU Xin-yue;LI Yun-hua(Beijing Institute of Space Launch Technology, Beijing 100076;School of Automation Science and Electrical Engineering, Beihang University, Beijing 100191)

机构地区：[1]北京航天发射技术研究所,北京100076 [2]北京航空航天大学自动化科学与电气工程学院,北京100191

出　　处：《液压与气动》2020年第8期93-100,共8页Chinese Hydraulics & Pneumatics

基　　金：NSFC-山西煤基低碳联合基金重点项目(U1910211)。

摘　　要：针对某大型设备起竖机构大角度快速起竖重型负载的需求,设计了包括起竖液压缸、插拔液压缸和缓冲液压缸3组执行机构共同组成的起竖液压系统。结合起竖机构特点对整个起竖过程中起竖运动关系进行了分析,采用负载敏感泵的功率控制功能结合变频调速控制实现了整个起竖阶段的恒功率控制,在起竖过质心后采用缓冲液压缸进行缓冲减速并继续翻转至最大起竖角度。通过实际使用和测试表明,系统的恒功率控制策略有效,所采用的缓冲液压缸具有很好的缓冲减速能力,提高了起竖过程的平稳性。According to the requirements of large angle and fast lifting of large-scale erecting mechanism,a erecting hydraulic system composed of erecting cylinder,bolt cylinder and buffering cylinder is designed.Based on the analysis of the relationship between erecting motion,the whole erecting stage's constant power control is realized by combining the power control of load-sensitive pump and the variable frequency speed regulation of electro-motor.When the erection angle of load increases to the center of mass,buffer hydraulic cylinder is executed to decelerate until the erection angle turns to the maximum angle.The actual application and test show that the constant power control strategy of the system is effective,the buffer hydraulic cylinder has a good buffer and deceleration ability,and the stability of the erecting process is improved.

关 键 词：液压系统 恒功率 起竖 缓冲减速 

分 类 号：TH137[机械工程—机械制造及自动化]