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能控制或调节液压系统中液体压力、液体流量和液流方向这三个基本参数的元件称为液压系统的控制元件。用它可以同时控制这三个参数,也可单独控制其中的一个或二个。利用各种控制元素的组合可以构成各种类型的液压系统,如随动系统、调速系统、程序(亦称逻辑)线路和各种动作系统等。液压控制元件的种类很多,一般可分为两类:控制阀和伺服阀。本讲仅简要讲述控制阀,伺服阀以后再作介绍。控制阀按其职能可分为:压力控制阀,流量控制伐及方向控制伐。
Can control or adjust the hydraulic system of liquid pressure, liquid flow and flow direction of these three basic parameters of the components called the hydraulic system control element. Use it to control these three parameters at the same time, but also can control one or two of them separately. The use of a variety of control elements can be composed of various types of hydraulic systems, such as servo system, speed control system, program (also known as logic) lines and a variety of motion systems. Many types of hydraulic control components, can be divided into two categories: control valves and servo valves. This talk briefly describes the control valve, servo valve and then make an introduction. Control valve according to their functions can be divided into: pressure control valve, flow control cutting and directional control cutting.