日立挖掘机两典型故障的测试与诊断  

Test and Diagnosis of Two Typical Troubles of HITACHI EX Series Hydraulic Excavator

作　　者：聂国权[1] 王海花[1] 祖炳洁[1] 

机构地区：[1]石家庄铁道学院,石家庄050043

出　　处：《煤矿机械》2005年第9期139-140,共2页Coal Mine Machinery

摘　　要：应用液压传动的基本原理,结合日立EX系列挖掘机机电液一体化的工作特点,对EX系列挖掘机两典型故障(挖掘无力与动作慢)的测试、诊断方法做了系统分析与介绍。归纳出挖掘无力的2种类型与故障特点以及整机动作迟缓的3种原因,同时指出了对应机、电、液故障的诊断测试方法与检测设备的选择。对快速、准确排除该类机型的典型故障具有实用意义。The test and diagnosis methods of two typical trouble of HITACHI EX series hydraulic excavator were introduced and analyzed in this paper by the principle of hydraulic transmission. It had characteristics of electronical-hydaulic-mechanical system. It is discovered that the two kinds of lack of cutting force and three reason of action slow. It is indicated that the test and diagnosis methods of electronical-hydaulic -mechanical trouble and selection methods of test equipment. The results indicate that the forward test and diagnosis methods have good effect on quick diagnosis typical trouble.

关 键 词：挖掘无力 动作慢 测试 诊断 

分 类 号：TH243[机械工程—机械制造及自动化] TP306[自动化与计算机技术—计算机系统结构]