大惯量闭式回转系统工作特性研究  

Research on Working Performance for Large Inertia Closed Slewing System

作　　者：李宗[1] 

机构地区：[1]中国矿业大学机电工程学院,江苏徐州221106

出　　处：《机床与液压》2015年第9期154-157,共4页Machine Tool & Hydraulics

摘　　要：闭式回转系统已广泛应用在超大型挖掘机中,然而其工作特性和控制要求之间的规律有待于进一步研究。对大型挖掘机闭式回转系统的原理进行了分析,建立闭式回转系统仿真模型。为达到较好的控制效果,分别研究了开环控制结构和闭环控制结构,并进行了比较。采用开环控制结构时,启动过程中系统压力在切断压力附近振荡,制动过程中系统完全溢流,不能回收能量;采用闭环控制结构时,启动、制动过程均能使系统压力稳定在控制压力附近,且可以回收多余能量。研究结果表明,闭环结构在挖掘机大惯量闭式回转系统中的控制效果更优。分析结果为超大型挖掘机的系统设计提供了参考。The closed slewing system has already been widely used in a large excavator. However the rule between its working performance and the control requirements is in need of further research. The principle of a closed slewing system of a large excavator was analyzed,and simulation model for the system was established. In order to achieve better control effect,the open-loop control and the closed-loop control were researched respectively,meanwhile the results were compared. The system pressure was oscillated around the cutting pressure during the startup process of the system,and completely overflowed without energy recycled during the braking process when the structure of open-loop control was adopted. When the structure of close-loop control adopted,the system pressure was stabilized nearby the controlled pressure during both the startup and braking processes and the excess energy was able to be recycled.The research results show that the effect of the closed-loop control structure in large inertia closed slewing system is even better. The analysis conclusions provide reference for the system design of a super large excavator.

关 键 词：挖掘机 闭式回转系统 开环 闭环 仿真 

分 类 号：TH137[机械工程—机械制造及自动化]