基于负载口独立的挖掘机回转液压系统仿真分析  

Simulation Analysis of Hydraulic Excavator Rotary Hydraulic System Based on Load Port Independent Technology

作　　者：丁鼎[1] 魏聪梅[1] 刘少龙[1] 李鹏[1] DING Ding;WEI Cong-mei;LIU Shao-long;LI Peng(School of Mechanical Engineering, Taiyuan University of Science and Technology, Taiyuan 030024,China)

机构地区：[1]太原科技大学机械工程学院,山西太原030024

出　　处：《液压气动与密封》2017年第7期13-15,3,共4页Hydraulics Pneumatics & Seals

摘　　要：负载口独立技术增加了系统的控制自由度,进、出口节流面积可独立调节。此方法与挖掘机回转液压系统的加速启动、减速制动的分段控制过程相吻合。利用系统增加的自由度进口采用计算流量反馈的控制方法控制回转平台转速,出口采用压力反馈控制方法实现回转平台的平稳制动。理论分析和Matlab/SimHydraulics仿真分析表明,利用负载口独立技术,可以提升挖掘机回转启动的快速性、降低减速制动时的压力冲击及减少反复振荡,是提升效率、启制动平稳性的有效途径之一。The load port independent is a technology that import and export throttling area can be separately controlled,so control degrees of freedom in valve control system is increased.This method is consistent with the segment control of excavator slewing hydraulic system in the process of acceleration and deceleration braking.By using the increased degree of freedom in system,a calculate flow feedback control method on import has been proposed,it realized the speed control of excavator rotation platform,outlet using pressure feedback control method to achieve a smooth braking of the slewing platform.Theoretical analysis and Matlab/SimHydraulics simulation analysis show that using the load port independent technology can enhance the rapidity of slewing start,reducing the deceleration braking pressure shocks and reduce repeated shocks,so,it’s one of the effective ways to promote efficiency and braking stability.

关 键 词：负载口独立 液压挖掘机回转 仿真 快速性 稳定性 

分 类 号：TH137.7[机械工程—机械制造及自动化]