EX220-3挖掘机行走速度异常的故障排除

EX220-3 Excavator Actuator Combined Operation of Discordant Fault Diagnosis and Elimination

EX220-3型挖掘机是日本日立公司生产的小型履带式挖掘机,该挖掘机有工作装置、上部回转台和行走装置三部分组成。该挖掘机行走速度的改变主要通过行走马达的斜盘角和主泵位移角的配合来实现的,而行走速度控制电路允许挖掘机以三种不同的速度行走,通过对行走速度控制系统分析,找出了行走速度不变化或比规定速度慢的故障原因和排除方法,这对EX220-3挖掘机行走速度不变化或比规定速度慢故障诊断起到一定的指导作用。

EX220-3 type excavator is small crawler excavator working device, the upper turntable and excavator Hitachi construction machinery company, the walking device is composed of three parts. To achieve the speed of walking excavator change mainly through the swash plate angle and the main pump displacement motor running angle, and walking speed control circuit allows the excavator in three different walking speed and walking speed control system, through the analysis, find out walking speed or slower than prescribed failure causes and methods the EX220-3 excavator, walking speed does not change or slower than the speed of fault diagnosis rules play a guiding role.