摘要
作为整个机械设计重要组成部分，液压系统设计在设计中具有非常特殊的地位。作为一种广泛应用于水电、港口、建筑、铁路与石油等其他工程项目中移动式起重机械，履带式起重机主要是行走驱动系统、升降系统、陀螺系统和变幅系统等组成。本设计宗旨是履带式起重机高效率、高功率、高可靠性要求，对起重机升降系统进行全面的数据解析，在此基础上设计起升液压系统回路。
最终表明，针对于定量泵与变量电机组成常的闭式液压系统展开正确的探讨，增大起升系统的安全性，达到起重机重载荷低转速行驶、空载荷高转速节能控制的目的。
 
关键词 履带式起重机；起升系统；液压系统；液压回路
Abstract
 As an important part of the whole mechanical design, the hydraulic system design has a very special position in the design. As a kind of moving lifting machinery widely used in other engineering projects, such as hydropower, port, construction, railway and petroleum, crawler crane is mainly composed of walking drive system, lifting system, gyroscope system and amplitude variable system. The purpose of this design is the high efficiency, high power and high reliability requirements of the crawler crane, and the comprehensive data analysis of the lifting system of the crane. On this basis, the hoisting hydraulic system circuit is designed.
Finally, it shows that the closed hydraulic system, which is often composed of the quantitative pump and the variable motor, is discussed correctly, and the safety of the lifting system is increased, and the purpose of the crane heavy load and low speed driving and the high speed and high speed energy saving control is achieved.
 
Keywords crawler crane  lifting system  hydraulic system  hydraulic circuit