液压阀[HYDRAULIC VALVE]

液压阀的品种繁多，除了不同品种、规格的通用阀外，还有许多专用阀和复合阀。就液压阀的基本类型来说，可按以下几种方式进行分类：按功能分类,1．压力控制阀用来控制液压系统中液流压力的液压阀。2．流量控制阀用来控制液压系统中液流流量的液压阀。3．方向控制阀用来控制液压系统中液流的流动方向的液压阀。除了上述具有单一功能的通用液压阀以外，还有一些专用液压阀和复合液压阀具有两种以上的功能，例如既能控制方向又能控制压力，或既能控制方向又能控制流量，等等。

Hydraulic valves of a wide variety, in addition to different varieties, specifications generic valves, there are many specialized valves and complex devices. Hydraulic valves on the basic types, classified according to the following manner : by functional classification 1. Hydraulic pressure control valves used to control the hydraulic pressure system flow valves. 2. Flow control valve hydraulic system used to control the flow of hydraulic valves Ye Liu. 3. Hydraulic control valves used to control the direction of the system flow mobile hydraulic valves direction. In addition to the overall function of a single hydraulic valves, hydraulic valves and a number of specialized hydraulic valves with more complex functions, such as pressure control can only control the direction or control which can control the direction of flow, and so on.

按控制方式分类1．定值或开关控制阀这类液压阀借助于通断型电磁铁或手调机构等方式，将阀芯位置或阀芯上的弹簧设定在某一工作状态，从而使液流的压力、流量或流向保持某一定值。这种液压阀属于最常见的普通液压阀。2．比例控制阀这类阀的输出量（流量、压力）可以按照输入信号的变化规律连续成比例地进行调节。它们常采用比例电磁铁将输入的电信号转换成力或阀的机械位移量，进行控制。也可以采用其它形式的电气输入控制器件。由于比例阀结构简单、工作可靠、价格较低，性能较普通的定值控制阀有明显提高，并且可以通过电信号进行连续控制，因此在许多场合获得了广泛应用。

Controlled manner by classification 1. Constant control valves or switches such hydraulic valves through hands-off type of electro-magnet or transfer institutions, will valve disc location of the spring-loaded or valve disc set in a working condition so that flow pressure, or flow to maintain a certain flow value. This hydraulic valves are the most common ordinary hydraulic valves. 2. Proportional control valves such devices export volume (flow, pressure) can be imported in accordance with the law of change in the continuous signal proportional to regulate. They often use imported electrical signal proportional electro-magnet will be converted into mechanical power or valves displacement volume control. Can also use other forms of electrical control devices. Because of valves structure simple, reliable work, the lower the price, performance than ordinary constant control valves have markedly improved, and through continuous electrical signal control, and therefore, on many occasions, gained widespread application.