汽车起重机的结构、工作原理及常见的故障分析 汽车专业毕业论文

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1、汽车起重机的结构、工作原理及常见的故障分析摘要随着现代基础建设的飞速发展，汽车起重机作为一种高效率的起重机械,已被广泛应用。正确使用和深入了解汽车起重机械,是广大基建者的渴求。汽车起重机是在通用或专用载货汽车底盘上装上起重工作装置对物料进行起重、运输、装卸或安装等作业的机械设备。它具有汽车的通过性好、机动灵活、行驶速度大、可快速转移、到达目的地能马上投入工作等优点。特别适用于流动性大、不固定的工作场所。由于它是在现成的汽车底盘上改装而成，固制造容易且较经济。是国民经济各部门中搬运物料所必须的机械设备。在现代化的生产过程中时合

2、理组织生产必不可少的生产设备。本论文针对三一汽车起重机的结构、工作原理及常见的故障进行了分析并给出了具体的排除方法。关键词：汽车起重机，液压系统，机械系统，故障诊断及维修21目录第一章：QY25产品特点···········································71.1产品简介················································71.2主要特点················································8　　1.3主要参

3、数················································9第二章：机械系统故障分析········································112.1大臂发抖·················································112.1.1大臂的结构··········································112.1.2故障现象········································

4、····112.1.3故障分析············································1121　　　2.1.4故障原因············································112.1.5排故方法············································112.1.6排故体会············································122.2起重臂缩不回·························

5、···················122.3回转发响·················································13第三章：液压系统故障分析········································143.1系统压力不足·············································143.2卷扬马达与卷扬减速机结合面渗油···························143.3上车空调马达不转··················

6、························15第四章：常见液压元件的维修与故障分析····························17214.1溢流阀与液压泵的维修·····································174.1.1溢流阀的维修·········································174.1.2液压泵的维修·········································184.2油泵的检测·····················

7、··························184.3液压缸自行回缩···········································194.3.1故障诊断············································194.3.2维修方法············································21第五章：结束语··················································22参考文献·········

8、········································23致谢·····················································2421第一章：QY25产品知识介绍211．1产品简介图1-1全液压汽车起重机是一种全回转、动臂