“ZL-50型轮式装载机工作装置、车架疲劳强度试验研究”课题属机械工业部重点科研项目“轮式装载机关键部件和关键技术研究”中一个子项的一项。动臂、车架是装载机的重要结构件,它们的疲劳寿命如何?将直接影响到装载机的工作可靠性和使用寿命。此项研究对提高装载机设计水平、产品质量、保证产品的可靠性和耐久性有着重要意义。 课题应用先进的疲劳载荷谱和室内模拟疲劳试验技术,对ZL-50型装载机的动臂、车架进行了静载、动载测试,编制了疲劳载荷谱和试验谱,并在电液伺服结构疲劳试验机上首次对后车架作了疲劳试验,都取得了良好的结果。 1.初步摸清了ZL-50型装载机动臂和车架在静载及动载作用下的受力情况、应力 “ZL-50 wheel loader working device, frame fatigue test research” subject is a key research project of the Ministry of Machinery Industry “wheel loader key components and key technology research” in a sub-item. Boom, frame is an important structural component of the loader, their fatigue life? Will directly affect the reliability and service life of the loader. This research is of great significance to improve the design level of loaders, product quality, product reliability and durability. The subject applies the advanced fatigue load spectrum and the indoor simulation fatigue test technology to carry out the static load and dynamic load test on the boom and frame of the ZL-50 loader. The fatigue load spectrum and test spectrum are prepared, Structural fatigue testing machine for the first time on the rear frame fatigue test, have achieved good results. 1. Initial find ZL-50-type loader boom and frame under static and dynamic load conditions, stress