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   上海明丰仓库大量现货---博世力士乐中国总代理

液压的定义:一个完整的液压系统由五个部分组成，即动力元件、执行元件、控制元件、辅助元件和液压油。动力元件的作用是将原动机的机械能转换成液体的压力能，指液压系统中的油泵，它向整个液压系统提供动力。液压泵的结构形式一般有齿轮泵、叶片泵和柱塞泵。执行元件(如液压缸和液压马达)的作用是将液体的压力能转换为机械能，驱动负载作直线往复运动或回转运动。 控制元件(即各种液压阀)在液压系统中控制和调节液体的压力、流量和方向。根据控制功能的不同，液压阀可分为压力控制阀、流量控制阀和方向控制阀。压力控制阀又分为溢流阀(安全阀)、减压阀、顺序阀、压力继电器等；流量控制阀包括节流阀、调整阀、分流集流阀等；方向控制阀包括单向阀、液控单向阀、梭阀、换向阀等。根据控制方式不同，液压阀可分为开关式控制阀、定值控制阀和比例控制阀。 辅助元件包括油箱、滤油器、油管及管接头、密封圈、压力表、油位油温计等。 液压油是液压系统中传递能量的工作介质，有各种矿物油、乳化液和合成型液压油等几大类。
液压元件：
　　液压元件中可分为动力元件和控制元件以及执行元件三大类。尽管都是液压元件，它们的自身功能和安装装使用的技术要求也不尽相同，现分别介绍如下：
　　一、什么是动力元件？
　　动力元件指的是各种液压泵。
　　1、齿轮油泵和串联泵（包括外啮合与内啮合）两种结构型式。
　　2、叶片油泵（包括单级泵、变量泵、双级泵、双联泵）。
　　3、柱塞油泵，又分为轴向柱塞油泵和径向柱塞油泵，轴向柱塞泵有定量泵、变量泵、（变
　　量泵又分为手动变量与压力补偿变量、伺服变量等多种）从结构上又分为端面配油和阀式配油油两种配油方式，而径向柱塞泵的配油型式，基本上为阀式配油。
　　液压元件分类
　　动力元件：齿轮泵、叶片泵、柱塞泵、螺杆泵；
　　执行元件：液压缸、活塞液压缸、柱塞液压缸、摆动液压缸、组合液压缸；
　　液压马达：齿轮式液压马达、叶片液压马达、柱塞液压马达；
　　控制元件：方向控制阀、单向阀、换向阀；
　　压力控制阀：溢流阀、减压阀、顺序阀、压力继电器等；
　　流量控制阀：节流阀、调速阀、分流阀；
　　辅助元件：蓄能器、过滤器、冷却器、加热器、油管、管接头、油箱、压力计、流量计、密封装置等；

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