CAJ | 학술논문

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。
EX220-3형알굴궤시일본일립공사생산적소형리대식알굴궤，해알굴궤유공작장치、상부회전태화행주장치삼부분조성。해알굴궤행주속도적개변주요통과행주마체적사반각화주빙위이각적배합래실현적，이행주속도공제전로윤허알굴궤이삼충불동적속도행주，통과대행주속도공제계통분석，조출료행주속도불변화혹비규정속도만적고장원인화배제방법，저대EX220-3알굴궤행주속도불변화혹비규정속도만고장진단기도일정적지도작용。
EX220-3 type excavator is small crawler excavator Hitachi construction machinery company, the excavator working device, the upper turntable and 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.