摘  要：详细介绍了CA-20地下自卸汽车工作液压系统和转向液压系统的设计，为四个步骤：根据各个系统的功能和整车布置拟定液压系统原理图；根据翻倾及转向角度分别计算工作油缸的行程；根据各系统所受的最大作用力确定系统压力；根据各系统的系统压力和流量选定各系统的泵及其他液压元件。实践CA-20地下自卸汽车液压系统是安全、可靠和高效的。 
关键词：地下自卸汽车；工作液压系统；转向液压系统；泵；油缸；
Abstract: In this paper the design of the hydraulic systems of working and steering for CA-20 Rear Dump Truck is introduced. The design include four steps. First of all according to the feature of each hydraulic system, we can draw the principle diagrams of the hydraulic systems of working and steering. Then we can calculate the travels of the dumping cylinders and steering cylinders by the angles of dumping and steering. And then we can decide the pressure of each hydraulic system through the maximal force on each system. At last may chose the pumps and other hydraulic parts according to the pressure and the flow of each hydraulic system, The fact has proved that the hydraulic system of the truck is safe, reliable and efficient.
Key words:  Rear dump truck   Hydraulic system of working   hydraulic system of steering  Pump  Cylinder
 
目录
一、绪论

（一）立项背景                                 1

（二）国内外研究现状与发展趋势  3

（三）项目实施的主要内容、技术关键与创新点、预期目标      5

（四）应用或产业化前景与市场需求                          6

（五）现有工作基础、条件和优势                            7
二、液压系统参数计算     

（一）概述                                          8

（二）工作液压系统参数计算     8

（三）转向液压系统参数计算 12   

（四）变矩器与发动机优化匹配MATLAB程序的编制    18

（五）液压缸装配、维护、修理工艺                       30


三、参考文献      50

谢辞 51

附页 52

机械毕业设计|论文