小型液压挖掘机液压系统及工作装置的设计.doc

PAGE 0  本科生毕业论文（设计） 小型液压挖掘机液压系统和工作装置设计 The design of small hydraulic excavator hydraulic system and device 摘 要 本次毕业设计课题是小型液压挖掘机的液压系统和工作装置。设计思路是根据液压挖掘机各部分的动作要求，参照同类型其他液压挖掘机来设计。工作装置结构图和液压系统图采用CAD2004绘制。 小型液压挖掘机主要由结构件、覆盖件、工作装置、行走装置、回转装置、液压系统、动力系统、电器系统等部分构成,最关键核心的是液压系统和动力系统。本文对小型液压挖掘机做了简要介绍，分析了液压挖掘机的主要动作，并根据动作要求设计了挖掘机的液压系统和工作装置。同时对回转装置、行走装置和各液压缸的参数进行初步估算。此液压系统采用液压先导控制，性能可靠，操纵强度低。 关键词：挖掘机；液压系统 ；工作装置 ；液压缸 Abstract The subject of graduation design is a small hydraulic excavator hydraulic system and device. Design concept is based on the various parts of the movement of hydraulic excavators requirements, taking into account the other same type hydraulic excavator design.Working device structure diagram and Hydraulic system diagram used AutoCAD2004 drawing. Mainly by the structure of small hydraulic excavator parts, covering parts, working devices,walking devices, rotating equipment, hydraulic systems, power system, electrical system parts, the most critical core is the hydraulic system and power systems. In this paper, a small hydraulic excavator gives a brief introduction, analysis of the major movements of hydraulic excavators and in accordance with movements to design the excavator hydraulic system and working devices. The same time, rotating equipment, walking equipment and the hydraulic cylinder parameters initial estimates. The hydraulic system adopts the hydraulic pilot control, reliable performance, manipulation of low intensity. Key words：Excavator;Hydraulic system ；Working device ；Hydraulic urn 目录 TOC \o 1-3 \h \u HYPERLINK \l _Toc15020 第1章 绪论 1 HYPERLINK \l _Toc24686 1.1 小型液压挖掘机简介 PAGEREF _Toc24686 1 HYPERLINK \l _Toc9787 1.2 国内外小挖的现状和发展情况 PAGEREF _Toc9787 3 HYPERLINK \l _Toc29320 1.2.1 国外现状和发展情况 PAGEREF _Toc29320 3 HYPERLINK \l _Toc101 1.2.2 国内现状和发展情况 PAGEREF _Toc101 3 HYPERLINK \l _Toc12901 1.3 本文拟达到的要求 PAGEREF _Toc12901 4 HYPERLINK \l _Toc14