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1.变幅角度自动变小(1)故障现象我公司1台日本加藤NK-500E-Ⅲ型汽车起重机在吊载重物作业时,只要吊臂停顿20min,电脑就会显示吊臂角度变小、作业半径增加。经观察,只要将吊臂起升到80°停顿10h,吊臂角度就减小到40°左右。该故障严重影响吊装施工,存在重大安全隐患。(2)故障排查该机变幅液压系统由变幅泵1、主溢流阀2、增压器3、溢流阀4、手动换向阀5、平衡阀6、变幅缸7、电磁阀8、压力
1. Amplitude angle automatically smaller (1) Failure phenomenon I Kato Japan Kato NK-500E-Ⅲ type of truck crane lifting heavy work, as long as the boom pause 20min, the computer will show the boom angle becomes smaller, The working radius increases. The observation, as long as the lifting boom to 80 ° pause 10h, the boom angle is reduced to about 40 °. The failure of a serious impact on the lifting construction, there are major security risks. (2) Troubleshooting The machine luffing hydraulic system consists of luffing pump 1, the main relief valve 2, supercharger 3, relief valve 4, manual valve 5, balance valve 6, luffing cylinder 7, the solenoid valve 8 ,pressure