涡轮增压器执行器弹簧应力松弛试验  

Stress Relaxation Test of Turbocharger Actuator Spring

作　　者：钱超 Qian Chao(Shanghai General Motors Corporation Limited Wuhan Branch,Wuhan,Hubei,430208,China)

机构地区：[1]上汽通用汽车有限公司武汉分公司,湖北武汉430208

出　　处：《小型内燃机与车辆技术》2020年第2期68-70,共3页Small Internal Combustion Engine and Vehicle Technique

摘　　要：以Inconel 718材料圆柱螺旋弹簧为研究对象,以涡轮增压器执行器为应用背景,开展圆柱螺旋弹簧高温工作环境应力松弛的试验。研究发现,温度越高,弹簧应力松弛越明显;时间越长,弹簧应力松弛越多,且应力松弛现象在前2 h内最为明显。此外,Inconel 718材料圆柱螺旋弹簧在450℃时的高温应力松弛远小于SUS304材料圆柱螺旋弹簧。The stress relaxation test of cylindrical helical spring under high temperature working environment was carried out on Inconel 718 material cylindrical helical springs of turbocharger actuator.It is found that the higher the temperature is,the more obvious the stress relaxation is;the longer the time is,the more stress relaxation is;and the stress relaxation is most obvious in the first 2 hours.In addition,the high temperature stress of Inconel 718 material cylindrical helical spring is much better than that of SUS304 material cylindrical helical spring at 450℃.

关 键 词：圆柱螺旋弹簧 应力松弛 工作温度 工作时间 弹簧材料 

分 类 号：U464.135.2[机械工程—车辆工程]