(4WRKE)先导式比例换向阀

(4WRKE)进口先导式比例换向阀 功能说明 Function description

先导控制阀型号4WRAP6W7.3X/G24  通径10、16、25、32/压力至35MPa/流量至3000L/min  Pilot control valve model: 4wrap6w7.3x/g24, diameter: 10, 16, 25, 32 / pressure: 35MPa / flow: 3000l / min

先导控制阀是直动式比例阀。控制边形状根据用于4WRKE型比例方向阀的先导控制阀而设计优化的。带可拆卸线圈比例电磁铁是密封的，油浸的直流电磁铁。它们把电流成比例的转化为机械力。电流强度越大，则相应的电磁力也越大。在整个调节过程中，调定电磁力保持不变retz品牌  The pilot control valve is a direct acting proportional valve. The shape of the control edge is designed and optimized according to the pilot control valve used for 4wrke proportional directional valve. The proportional electromagnet with detachable coil is a sealed, oil immersed DC electromagnet. They convert electric current into mechanical force in proportion. The greater the current intensity, the greater the corresponding electromagnetic force. During the whole adjustment process, the set electromagnetic force remains unchanged.

先导控制阀主要由下列部份分组成∶阀体（1），比例电磁铁（2和3），阀芯（4）和弹簧（5和6）The pilot control valve is mainly composed of the following parts: valve body (1), proportional electromagnets (2 and 3), valve core (4) and springs (5 and 6)

在电磁铁不带电时，工作油口都与油箱相通。如果两个电磁铁（2和3）中的一个得电，电磁力克服弹簧（5和6）的力推动阀芯（4）运动。一旦通过遮盖区，两个与油箱相通的工作油口中的一个被堵，并与压力腔相通。这时液流从P□流至主阀的控制腔。从而推动主阀芯运动  When the electromagnet is not charged, the working oil port is connected with the oil tank. If one of the two electromagnets (2 and 3) is energized, the electromagnetic force pushes the valve core (4) against the force of the springs (5 and 6). Once passing through the cover area, one of the two working oil ports communicating with the oil tank is blocked and communicates with the pressure chamber. At this time, the liquid flows from P □ to the control chamber of the main valve. Thereby pushing the main valve element to move

4VRKE 型阀是二级比例方向控制阀，它们控制液流的大小和方向。由于主级是位置闭环控制的，所以在大流量时阀芯的位置和液动力无关  4vrke valve is a two-stage proportional directional control valve, which controls the size and direction of liquid flow. Since the main stage is controlled by position closed loop, the position of the valve core is independent of the hydraulic force at large flow rate

阀的基本组成先导控制阀（1），阀体（8），主阀芯（7），端盖（5）和（6），对中弹簧（4），感应位移传感器（9）和减压阀（3）Basic composition of the valve: pilot control valve (1), valve body (8), main valve core (7), end caps (5) and (6), centering spring (4), inductive displacement sensor (9) and pressure reducing valve (3)

如果没有信号输入，则主阀芯（7）在对中弹簧（4）的作用下保持在中位，端盖（5）和（6）内的两个控制腔通过先导阀芯（2）与油箱连通。主阀芯（7）通过感应位移传感器（9）与相应的电子放大器相连，主阀芯（7）的位置随着给定值在放大器加法点产生的差动电压变化而变化。通过电子放大器得到给定值和实际值比较后的控制偏差，并产生电流输入先导阀（1）的比例电磁铁。电流在电磁铁内感应电磁力，传递到电磁铁推杆并推动控制阀芯（2）。通过控制口的液流使主阀芯（7）运动。带磁心感应位移传感器（9）的主阀芯（7）一直运动，直到实际值与给定值相等。在控制条件下，主阀芯（7）处于力平衡，并保持在控制位置  If there is no signal input, the main valve element (7) is kept at the middle position under the action of the centering spring (4), and the two control chambers in the end caps (5) and (6) are connected with the oil tank through the pilot valve element (2). The main valve element (7) is connected to the corresponding electronic amplifier through an inductive displacement sensor (9), and the position of the main valve element (7) changes with the variation of the differential voltage generated by the given value at the addition point of the amplifier. The control deviation after the comparison between the given value and the actual value is obtained through the electronic amplifier, and a current is generated to input the proportional electromagnet of the pilot valve (1). The current induces electromagnetic force in the electromagnet, which is transmitted to the electromagnet push rod and pushes the control valve core (2). The liquid flow through the control port moves the main valve element (7). The main valve element (7) with the magnetic core inductive displacement sensor (9) moves continuously until the actual value is equal to the given value. Under the control condition, the main valve element (7) is in force balance and remains in the control position.

阀芯行程和控制口的开度变化与给定值成比例 The valve core stroke and the opening of the control port are proportional to the given value

电子放大器内置于阀内。通过阀和电子放大器匹配，系列产品价格变得廉价。必须避免回油管路中的油全部排空，必要时在回油路中安装背压阀（背压约0.2MPa）The electronic amplifier is built in the valve. By matching the valve with the electronic amplifier, the price of this series of products becomes cheap. It is necessary to avoid all the oil in the oil return pipeline from being drained. If necessary, install a back pressure valve (back pressure is about 0.2MPa) in the oil return pipeline.

性能特点 Performance characteristics

●WRKE先导式二级比例方向阀可用于控制液流方向和大小  Wrke pilot type two-stage proportional directional valve can be used to control the direction and size of liquid flow

●通过螺纹比例电磁铁实现，线圈可单独拆卸 Realized by screw proportional electromagnet, the coil can be disassembled separately

●板式连接，阀芯由弹簧对中 Plate connection, valve core centered by spring

●带内置放大器，输入可选A1或F1 With built-in amplifier, input optional A1 or F1

●主级带位置闭环控制，使用电位置反馈 Main stage with position closed-loop control, using electric position feedback

型号说明 Model description

功能说明 Function description

机能符号(简化符号） Functional symbol

机能符号(详细符号） Functional symbol

技术参数 Technical parameter

慨述 Express with regret

液压部分（在P=10MPa，矿物油40℃±5℃时测得）

电器部分