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中小吨位汽车起重机吊臂分为四节吊臂和五节吊臂2种结构。四节吊臂结构只有1根伸缩缸,而五节吊臂结构有2根伸缩缸。四节吊臂、五节吊臂起重机出现吊臂自动回缩现象时,判断故障的方法有所不同,现分述如下。1.四节吊臂四节吊臂(1个伸缩缸)液压回路如图1所示,其主要由操纵阀、伸缩缸和平
Small and medium-tonnage truck crane boom is divided into four jib and five jib 2 kinds of structures. Four boom structure only one telescopic cylinder, and five boom structure has two telescopic cylinder. Four boom, five jib cranes boom automatic retraction phenomenon, to determine the fault method is different, are described below. 1. Four-section boom Four-section boom (1 telescopic cylinder) The hydraulic circuit is shown in Fig.1, which is mainly composed of the control valve, telescopic cylinder and flat