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西安大型吊装教你起重机卷扬不动的故障诊断方法

作者:admin 发布日期:2018/8/17 关注次数: 二维码分享

WEISHENMEQIZHONGJIJUANYANGYOUSHIHOUHUIBUDONGNI?XIANDAXINGDIAOZHUANGSHEBEIZULINGONGSIDEXIAOBIANJIDAJIAFENXIANGYIXIA。

西安大型吊装

液压起重机的卷扬回路是由控制阀将双联泵的高压油送至液压马达,压力油通过一个带阻尼的梭阀进入制动器活塞油缸,推动活塞使制动器打开,马达开始转动,通过两极行星减速带动卷筒转动,使钢丝绳卷上或者放出,实现重物的起升和下降。
该车故障表现为:正在进行起重作业时,突然卷扬马达不转,起升、下落均无反应,而其他液压机构均能正常工作,在操纵起升机构手柄时,压力表显示为0.
由于其他机构都能正常工作,所以首先排除液压泵的故障。之后,由于其他机构均能正常工作,而当操作起升机构时,压力为0,所以判定问题一定出在卷扬回路的溢流阀上,因为假设是液压泵出问题的话,当操纵到两泵合流的位置时,卷扬也应该有动作,只不过应该慢一些才对。

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