《比例阀基本原理》由会员分享，可在线阅读，更多相关《比例阀基本原理（85页珍藏版）》请在金锄头文库上搜索。
1、PROPORTIONAL VALVES - BASIC PRINCIPLESPROPORTIONAL VALVES - BASIC PRINCIPLESCopyrightEaton Hydraulics 2000CopyrightEaton Hydraulics 2000Steve Skinner, Eaton Hydraulics, Havant, UKSteve Skinner, Eaton Hydraulics, Havant, UK比例阀基本原理比例阀基本原理BASIC SYSTEMBASIC SYSTEM1)一般认为一个简单的液压系统由油 箱（A）、电动机（B）、泵（C）、溢 流阀（
2、D）、过滤器（E）、流量控制 阀（F）、方向控制阀（G）、和油缸 （H）组成。2) 油缸的运动是由流量控 制阀（确定运动的速度） 和方向控制阀（油缸运动 的方向）控制。ABCDEFHGBASIC SYSTEMBASIC SYSTEM当电磁阀得电时，油缸活塞将伸出和 回缩,其速度由流量控制阀确定，而电 磁阀不具有控制速度的能力。BASIC SYSTEMBASIC SYSTEMA three position solenoid valve can:- extend the cylinderBASIC SYSTEMBASIC SYSTEMA three position solenoid valve
3、 can:- extend the cylinder- retract the cylinderBASIC SYSTEMBASIC SYSTEMA three position solenoid valve can:- extend the cylinder- retract the cylinder- stop the cylinder因此电磁阀的动作非常象一个电路中的开 关在此位置灯是关闭状态. 在另外一个位置是开启状态， 而没有中间状态。and in the other position it is switched on but there are no intermediate st
4、ates.然而众所周知，另一种形式的开关能够 用来控制灯泡，调光开关However, another type of switch can be used for controlling a light bulb known as a dimmer switch.在这个例子中，这个开关能够被转到全开 和全关的任一位置，来调整灯泡的亮度In this case, the switch can be turned to any position between fully off and fully on to vary the brightness of the bulb.In this cas
5、e, the switch can be turned to any position between fully off and fully on to vary the brightness of the bulb.In this case, the switch can be turned to any position between fully off and fully on to vary the brightness of the bulb.In this case, the switch can be turned to any position between fully
6、off and fully on to vary the brightness of the bulb.In this case, the switch can be turned to any position between fully off and fully on to vary the brightness of the bulb.In this case, the switch can be turned to any position between fully off and fully on to vary the brightness of the bulb.在这个例子中
7、，这个开关能够被转到全开 和全关的任一位置，来调整灯泡的亮度。In this case, the switch can be turned to any position between fully off and fully on to vary the brightness of the bulb.In this case, the switch can be turned to any position between fully off and fully on to vary the brightness of the bulb.BASIC SYSTEMBASIC SYSTEM2)阀
8、芯能够移动到在任一 位置，而不仅仅是三个不 连续的位置。阀芯在离开中位的方向仍 然确定油缸运动的方向， 但阀芯离开中位的距离控 制活塞的速度。1)比例方向阀能够被看作与调光开 关具有同样功能。A proportional directional valve can be thought of as the dimmer switch equivalent of an electrical switch.BASIC SYSTEMBASIC SYSTEM于是在实际上比例阀可以同时作为方 向阀和流量阀来使用。So in effect the proportional directional valv
9、e is acting as both a directional valve and a flow control valve.SWITCHING SOLENOID VALVESWITCHING SOLENOID VALVE一个传统的电磁阀能够被认为是一个简单的开关阀。A conventional solenoid valve can be thought of as a simple switching valve.它可以被一些只有简单电流通断的开关的电设备来控制It is controlled by some form of electrical device which simply
10、switches the electrical current on or off.SWITCHING SOLENOID VALVESWITCHING SOLENOID VALVEA conventional solenoid valve can be thought of as a simple switching valve.It is controlled by some form of electrical device which simply switches the electrical current on or off.SWITCHING SOLENOID VALVESWIT
11、CHING SOLENOID VALVEA conventional solenoid valve can be thought of as a simple switching valve.It is controlled by some form of electrical device which simply switches the electrical current on or off.PROPORTIONAL VALVEPROPORTIONAL VALVE一个比例方向阀是由与一个与调光开关非常象的电设备控制的。A proportional directional valve h
12、owever will be controlled by an electrical device more like a dimmer switch.PROPORTIONAL VALVEPROPORTIONAL VALVE通过改变两个之一电磁铁的电流，阀芯移动的位移能够被改变， 因此控制了通过阀的流量。By varying the current to either solenoid, the amount of spool movement can be varied and hence the amount of flow through the valve can be control
13、led.PROPORTIONAL VALVEPROPORTIONAL VALVEBy varying the current to either solenoid, the amount of spool movement can be varied and hence the amount of flow through the valve can be controlled.PROPORTIONAL VALVEPROPORTIONAL VALVEBy varying the current to either solenoid, the amount of spool movement c
14、an be varied and hence the amount of flow through the valve can be controlled.PROPORTIONAL VALVEPROPORTIONAL VALVEBy varying the current to either solenoid, the amount of spool movement can be varied and hence the amount of flow through the valve can be controlled.PROPORTIONAL VALVEPROPORTIONAL VALV
15、EBy varying the current to either solenoid, the amount of spool movement can be varied and hence the amount of flow through the valve can be controlled.PROPORTIONAL VALVEPROPORTIONAL VALVEBy varying the current to either solenoid, the amount of spool movement can be varied and hence the amount of fl
16、ow through the valve can be controlled.PROPORTIONAL SOLENOIDPROPORTIONAL SOLENOID因此不像传统的电磁阀，通 过比例阀线圈的电流需要被 调整，而不仅仅是开关式的 通断。比例阀电磁铁的结构与开关 式电磁铁是相似的。电磁铁包括:- 线圈 (A)- 框架 (B)- 电枢 (C)- 电极片 (D)- 顶针 (E)电枢被 包在一个芯轴管（F ）中。 (同时全部的总成经 常被压进一个树脂塑料的外 罩（G）中）ABCDFGEPROPORTIONAL SOLENOIDPROPORTIONAL SOLENOIDWhen a voltage is applied to the coil connections, an electrical current will flow through the coil.PROPORTIONAL SOLENOIDPROPORTIONAL SOLEN
