基于体积增量均匀释放原则的卸荷规律研究  

Research on unloading rules based on volume increment uniform release

作　　者：孙康[1,2] 吴欣[1] 司玉校[2] 胡川[1] 

机构地区：[1]江西理工大学机电工程学院,江西赣州341000 [2]中南大学机电工程学院,湖南长沙410083

出　　处：《锻压技术》2014年第6期75-80,共6页Forging & Stamping Technology

基　　金：国家科技重大专项资助项目(2009ZX04005-031);国家重点实验室开放基金资助项目(GZKF-201023);江西省自然科学基金资助项目(20122BAB206030)

摘　　要：为了提高高压大流量液压系统卸荷过程中的快速性和平稳性以及降低在卸荷过程中系统的液压冲击,对液压系统卸荷机理进行了理论分析和研究,分析了体积增量均匀释放原则卸荷方法,根据评判卸荷优劣的两个准则——快速性和平稳性,从理论上提出一种基于体积增量均匀释放原则的高压大流量液压系统卸荷方法,通过对系统相关元件的特性分析,推导出卸荷阀芯开启控制曲线。通过仿真将基于体积增量均匀释放原则的卸压阀阀芯开启位移控制曲线与传统控制曲线下的液压卸荷效果进行对比,仿真结果表明,基于体积增量均匀释放原则的卸荷方法卸荷平稳性好,卸荷效果优越,有效地降低了卸荷时的液压冲击,验证了新方法的优越性。To improve the rapidity and stationarity of high pressure large flow hydraulic system and reduce the hydrodynamic shock during the course of unloading, the mechanism of unloading for hydraulic system was theoretically studied and analyzed. The unloading method on the principle of volume increment uniform release was analyzed. According to the rapidity and stationarity which were the principles to judge unloading system, an unloading method of high pressure large flow hydraulic system based on the principle of volume increment uni- form release was theoretically proposed. Besides, the open control curve of unloading valve core was theoretically deduced by analyzing the system components. The hydraulic unloading effect was compared between the open displacement control curve of pressure relief valve core with the traditional control curve through simulation based on the principle of volume increment uniform release. The result shows that the stationarity of the former method is good, the unloading effect is better, and the hydrodynamic shock is reduced effectively, which demon- strates the new superiority of method.

关 键 词：高压大流量液压系统 卸荷 体积增量 均匀释放 

分 类 号：TH137[机械工程—机械制造及自动化]