摘要
液压系统面向对象的分析问题描述液压系统分为液压传动系统和液压控制系统两种类型，本文的研究对象是液压传动系统。液压系统是能实现系统功能的液压回路的总和。液压回路又是能实现某种规定功能的液压元件的组合。液压元件是组成液压系统的基本单元。主要的液压元件有液压泵、执行元件（液压缸、液压马达）、液压控制阀（压力控制阀、流量控制阀、方向控制阀等）、液压辅件（密封圈、滤油器、蓄能器、油箱及其附件、管件、热交换器等）。液压控制阀按照其安装形式的不同又可分为普通阀、叠加阀、插装阀。液压回路是液压元件组成的功能单元。液压回路主要有压力控制回路、流量（速度）控制回路、方向控制回路、安全回路、定位回路、同步回路、顺序动作回路等。以上分类只是粗略分类，限于篇幅，详细分类此处不一一列出。液压系统设计就是根据机械师提出的主机的动作循环要求、静、动态性能及液压系统工作环境等方面的要求，进行系统的工况分析，确定主要参数（包括系统压力、系统流量、液压执行元件类型及主要参数等），选择合理的液压回路和液压元件，设计工作的最终形式是液压系统原理图和各种技术文件。
ABSTRACT:
Hydraulic system object-oriented analysis described hydraulic system hydraulic drivetrain system and hydraulic control systems into two types, the present study is hydraulic drivetrain system. Hydraulic system is to achieve the hydraulic circuit system functions combined. Hydraulic circuit is to achieve a certain provisions of the hydraulic components functional combination. Hydraulic hydraulic system components is the basic unit of composition. Hydraulic Pump is the main hydraulic components, the implementation of components (hydraulic tanks, hydraulic motors), the hydraulic control valves (pressure control valves, flow control valves, control valves direction), hydraulic Des pieces (Mifengjuan, filters, storage devices, fuel tanks and accessories, and pieces, heat exchangers, etc). Hydraulic control valves installed in accordance with its different forms can be divided into ordinary valves, combined valve and inserted loaded valves. Hydraulic circuit is composed of functional modules hydraulic components. Hydraulic pressure control circuit main circuit, the flow (speed) control circuit, direction control circuit, safety circuit, positioning circuit, synchronous circuit, the sequence moves circuit. The above classification is only a rough classification of space limitations, it does not list detailed classification here. Hydraulic system design is based on the mechanics of the functioning mainframe cycle requirements, static and dynamic performance and hydraulic systems work environment requirements for system analysis of the situation, identify key parameters (including system pressure, system flow, hydraulic components types and the implementation of major parameters, etc.), select a reasonable hydraulic circuit and hydraulic components, Design work is the ultimate form of hydraulic systems theory, and various technical documents.
