我单位一台TY220推土机在施工中突然无动力,加挡后也不能工作。操纵工作手柄,各个油缸都无动作,但发动机工作正常,且无明显异常响声。通过试压发现,转向制动油路压力正常,变速油路和工作油路无压力。初步分析认为,变速泵和工作泵同时损坏且完全不供油的可能性很小,故障可能出在发动机动力输出装置和分动箱上。 TY220推土机的动力输出过程为:发动机的动力由飞轮通过惰轮传递给分动箱传动齿轮,由传动齿轮通过其上的键带动传动轴转动,传动轴又通过内花键带转主轴,主轴则通过其上的键带动主动轮旋转,然后通过两个从动轮分别带动变速泵和工作泵工作。 分析认为,该机因传动齿轮折断而 TY220 bulldozer in my unit suddenly no power in the construction, after Canada also can not work. Manipulate the work handle, each cylinder no action, but the engine is working properly, and no significant abnormal noise. Through the pressure test found that steering brake oil pressure normal, variable speed oil and working oil pressure. Preliminary analysis that the variable speed pump and the working pump damaged at the same time and the possibility of no oil at all, the failure may be in the engine power output device and the transfer case. TY220 bulldozer power output process: the engine power from the flywheel through the idler gear transmission case transfer gear, the transmission gear through its key drive shaft, the drive shaft through the spline with the spindle, the spindle then Driven by the keys on the drive wheel rotation, and then driven by two driven gear pump and work pump. Analysis, the aircraft due to transmission gear broken off