非驱动腔压力调控液压挖掘机能效特性研究  

Research on Energy Efficiency Characteristics of Hydraulic Excavator with Non-driving Chamber Pressure Regulation

作　　者：吕涵 葛磊 张红娟 权龙 赵斌 LYU Han;GE Lei;ZHANG Hongjuan;QUAN Long;ZHAO Bin(Key Lab of Advanced Transducers and Intelligent Control System,Ministry of Education&Shanxi Province,Taiyuan University of Technology,Taiyuan Shanxi 030024,China)

机构地区：[1]太原理工大学,新型传感器与智能控制教育部与山西省重点实验室,山西太原030024

出　　处：《机床与液压》2022年第9期155-162,共8页Machine Tool & Hydraulics

基　　金：国家自然科学基金面上项目(51775363);NSFC-山西煤基低碳联合基金(U1910211)。

摘　　要：为减少非最高负载执行器控制阀口存在的节流损失,同时减少执行机构的重力势能及动能以节流损失形式耗散,提出通过非驱动腔压力调控原理减小负载差异导致的节流损失,并回收执行机构动势能,实现液压挖掘机系统低压损动力分配与传递;建立系统数字样机进行仿真分析。结果表明:新系统在保证控制性能的基础上,能通过压力调控提高非最高负载执行器非驱动腔压力,进而提高驱动腔压力,减小节流损失并回收能量;新系统还能回收执行机构动势能,在一个挖掘循环内,整机节能比例为13.22%。In order to reduce the throttling loss existing in the control valve port of the non-highest load actuator,and reduce the gravitational potential energy and kinetic energy of the actuator to be dissipated in the form of throttling loss,the principle of non-driven chamber pressure regulation was used to reduce the throttle loss caused by the load difference and to recover the working devices’kinetic and potential energy to realize the low-pressure loss power distribution and transmission of the hydraulic excavator system;a system model was established for simulation analysis.The result shows that by using the new system,on the basis of ensuring the control performance,the pressure of the non-driven chamber of the non-highest load actuator can be increased through pressure regulation,thereby the pressure of the driven chamber can be increased,the throttle loss can be reduced and the energy can be recovered;the new system can be use to recover the actuators’kinetic and potential energy,the energy-saving ratio of the whole machine to complete an excavation cycle is 13.22%.

关 键 词：液压挖掘机 压力调控 节流损失 能量回收 挖掘循环 

分 类 号：TH137.7[机械工程—机械制造及自动化]