大型液压机卸压冲击影响因素研究  

Study of influential factors on decompression shock of large hydraulic press

作　　者：周宇峰[1] 谭建平[1] 许洪韬 曾乐[1] 

机构地区：[1]中南大学机电工程学院高性能复杂制造国家重点实验室,湖南长沙410083

出　　处：《锻压技术》2015年第11期58-62,共5页Forging & Stamping Technology

基　　金：国家科技重大专项(2009ZX04005-031);高性能复杂制造国家重点实验室自主探索基金(zzyjkt2013)

摘　　要：从能量形成和释放的角度分析了卸压冲击的理论计算公式,并得到了管路参数、油液参数、系统初始压力和卸压阀开启时间等影响卸压冲击的因素;建立了液压系统的AMESim仿真模型,通过单一变量法仿真分析各因素对卸压冲击的影响规律;将卸压管道分成液压冲击源至卸压阀和卸压阀至油箱两段,使得管道长度对卸压冲击的影响规律研究得更为细致。研究结果表明,卸压管路的长度尤其是卸压阀至油箱段管路长度、管路内径、管路材料弹性模量、卸压阀开启时间和系统初始压力是影响卸压冲击的关键因素。Theoretical formulas were summarized on the formation and release of energy,and many factors such as pipe parameters,oil parameters,initial pressure of system,opening time of unloading value,etc. influencing on the decompression shock were presented.The AMESim simulation model of the hydraulic system was set up. The influence regularities on decompression shock were simulated and analyzed by single variable method. The influence regularities of pipe length on decompression shock were researched more carefully by dividing pipe into two parts from hydraulic source to unloading-valve and from unloading-valve to oil tank. The conclusions show that the key factors influencing on the decompression shock are the pipe length,which is from unloading-valve to oil tank especially,diameter,elastic modulus of the pipe,the unloading-valve opening time and initial pressure of system.

关 键 词：大型液压机 卸压冲击 管路 油液 

分 类 号：TG315.4[金属学及工艺—金属压力加工]