起重机泵阀协同系统模式切换压力冲击研究  

Mode Switching Pressure Impact of Pump-valve Cooperative System of Crane

作　　者：李骞飞 杨敬 权龙 LI Qian-fei;YANG Jing;QUAN Long(College of Mechanical and Vehicle Engineering, Taiyuan University of Technology, Taiyuan, Shanxi 030024)

机构地区：[1]太原理工大学机械与运载工程学院,山西太原030024

出　　处：《液压与气动》2022年第3期12-21,共10页Chinese Hydraulics & Pneumatics

基　　金：国家重点研发计划(2018YFB2001203)。

摘　　要：现有的起重机泵阀协同压力流量复合液压控制系统,降低了快速大流量时的系统能耗,提高了微动时流量的控制精度;但是该系统在快速模式和微动模式之间切换时,液压缸无杆腔内会产生流量和压力的剧烈波动,原因是电液比例泵和电液比例多路阀的控制不协调。为有效解决这一问题,建立一种泵阀协同压力复合液压控制系统的AMESim和Simulink联合仿真模型,对新的控制策略进行验证,结果显示:改进控制策略后,由快速模式切换到微动模式时,液压缸无杆腔内的压力波动幅度降低17.98%,流量波动幅度降低37.02%,泵的出口压力能够平滑过渡,从快速模式到微动模式液压缸全程跟随误差减少2.12%。In the existing crane pump-valve cooperative pressure flow composite hydraulic control system,the system energy consumption is reduced when the flow is fast and large,and the flow control accuracy is improved when the slow motion of the cylinder.However,when the system switches between the fast mode and the slow mode,the flow and pressure in the rodless cavity of the hydraulic cylinder will fluctuate violently.The reason is that the control of the electro-hydraulic proportional pump and the electro-hydraulic proportional multi-way valve is not coordinated.In order to solve this problem,the AMESim and Simulink co-simulation model of the pump-valve cooperative pressure-flow compound control hydraulic system is established to verify the new control strategy.The results show that after improving the control strategy,when switching from fast mode to slow mode,the pressure fluctuation amplitude in the rodless cavity of the oil cylinder is reduced by 17.98%,the flow fluctuation amplitude is reduced by 37.02%,the pressure in front of the electro-hydraulic proportional multi-way valve can transition smoothly,and the whole follow-up error of the oil cylinder from fast mode to micro mode is reduced by 2.12%.

关 键 词：起重机 联合仿真 数字流量补偿 流量波动 压力波动 泵阀协同 

分 类 号：TH137[机械工程—机械制造及自动化]