4WRZ(E) H-7X进口电液比例换向阀 功能说明 Function description

先导控制阀型号3DREP6…通径10、16、25、32/压力至35MPa/流量至1600L/min  Pilot control valve model 3drep6... Diameter 10, 16, 25, 32 / pressure to 35MPa / flow to 1600L / min

3DREP（E）6型三能比例减压阀是由可单独拆卸线圈的螺纹比例电磁铁直接控制的；它把输入的电信号转换成比例压力信号输出。可用于所有的4WFZ…型比例阀的控制。该阀由比例电磁铁（5）和（6）、阀体（1）、带压力检测阀芯（3）和（4）的控制阀芯（2）及可选内置放大器（7）组成 retz品牌 3drep (E) 6 three energy proportional pressure reducing valve is directly controlled by a screw proportional solenoid with a detachable coil; It converts the input electrical signal into a proportional pressure signal for output. It can be used to control all 4wfz... Proportional valves. The valve is composed of proportional electromagnets (5) and (6), valve body (1), control valve element (2) with pressure detection valve elements (3) and (4) and optional built-in amplifier (7)

当电磁铁（6）输入信号时，电磁力经压力检测阀芯（4）作用在控制阀芯（2）上并使其右移，于是P腔和B腔相通，并在B腔建立压力，B 腔压力经控制阀芯（2）的径向孔作用在阀芯右端和压力检测阀芯（4）左端，产生的压力克服电磁力直到两种压力平衡使工作油口B压力恒定。如果电磁力减小导致控制阀芯（2）左移，从而B腔到T腔通，使工作油口B压力下降，使系统压力保持在较低的压力下。切断输入信号，控制阀芯通过弹簧返回中间位置，使A、B腔与T腔相通，因此压力油能够自由流回油箱  When the electromagnet (6) inputs a signal, the electromagnetic force acts on the control valve core (2) through the pressure detection valve core (4) and causes it to move to the right, so the cavity P and cavity B are connected, and the pressure in cavity B is established. The pressure in cavity B acts on the right end of the valve core and the left end of the pressure detection valve core (4) through the radial hole of the control valve core (2), and the generated pressure overcomes the electromagnetic force until the two pressures are balanced to make the pressure at the working oil port B constant. If the decrease of electromagnetic force causes the control valve core (2) to move to the left, so that the cavity B is connected to the cavity T, the pressure of the working oil port B is decreased, and the system pressure is kept at a low pressure. Cut off the input signal, control the valve core to return to the middle position through the spring, so that cavities A and B are connected with cavity T, so the pressure oil can flow back to the oil tank freely

先导式比例方向阀 Pilot operated proportional directional valve

4WRZ型阀是靠比例电磁铁控制的先导式比例换向阀，将电气信号转换成液体压力信号，用来控制液流的方向和大小。该阀主要由带比例电磁铁（5）和（6）的先导阀，装有主阀芯（11）和对中弹簧（12）的主阀（10）及可选内置放大器（7）组成  4wrz type valve is a pilot type proportional reversing valve controlled by a proportional electromagnet, which converts electrical signals into liquid pressure signals to control the direction and size of liquid flow. The valve is mainly composed of a pilot valve with proportional electromagnets (5) and (6), a main valve (10) equipped with a main valve core (11) and a centering spring (12) and an optional built-in amplifier (7)

当电磁铁“b”通电时，控制阀芯（2）右移，控制油经过先导阀（9）进入控制腔（13），并与输入信号成比例的推动主阀芯（11）左移，于是主阀芯逐渐移动并打开关在控制台阶上的V型槽，从而使P到A；B到T 流通。当电磁铁“a’通电时，控制阀芯（2）左移，从而使P到BA到T流通。控制油可通过P□内供或x口外供。当电磁铁不带电时，对中弹簧（12）将主阀芯（11）保持在中位，并与先导压力无关  When the electromagnet "B" is energized, the control valve element (2) moves to the right, and the control oil enters the control chamber (13) through the pilot valve (9), and pushes the main valve element (11) to move to the left in proportion to the input signal, so that the main valve element gradually moves and switches on the V-shaped groove on the control step, so that P to a; B to t flow. When the electromagnet "a" is energized, the control valve element (2) moves left, so that P to Ba to t flow. The control oil can be supplied internally through P □ or externally through X port. When the electromagnet is not charged, the centering spring (12) keeps the main valve element (11) at the neutral position, independent of the pilot pressure

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.

外控先导式比例方向阀 Externally controlled pilot proportional directional valve

4WRH…型阀是一种利用外设的调压阀来控制的先导式比例方向阀。其功能及原理与4WRZ…型阀相同。只是不带先导阀部分，装上连接板（14），使控制口A和油口T（Y）相通，控制口B和油口P（X）相通。主阀的控制压力不允许超过2.5MPa  4wrh... Type valve is a pilot type proportional directional valve controlled by external pressure regulating valve. Its function and principle are the same as 4wrz. Except for the part without pilot valve, the connecting plate (14) is installed to make the control port a communicate with the oil port t (y) and the control port B communicate with the oil port P (x). The control pressure of the main valve shall not exceed 2.5MPa

4WRH/Z型比例阀采用板式连接，与相同通径的普通换向阀连接尺寸相同，安装调试方便阀体采用铸造内通道，通流能力强，流量大主阀芯采用轴向三角控制沟槽，控制台肩压降小主阀采用弹簧对中，主阀芯无漂移，重复精度高，可靠性好单个阀既可控制流量又可控制流动方向，使系统结构简单，适用于流量比较大精度要求高的系统中。广泛应用于机床、治金、轻工、矿山、工程等各行业  4wrh / Z proportional valve adopts plate connection, which is the same size as ordinary directional valve with the same diameter. It is easy to install and debug. The valve body adopts cast internal channel, with strong flow capacity and large flow. The main valve core adopts axial triangular control groove, with small pressure drop on the console shoulder. The main valve adopts spring centering, with no drift of the main valve core, high repetition accuracy and good reliability. A single valve can control the flow and the flow direction, making the system structure simple, It is suitable for systems with large flow and high accuracy requirements. It is widely used in machine tools, metallurgy, light industry, mining, engineering and other industries

性能特点 Performance characteristics

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

●WRH直动式比例方向阀，可用于控制流量和方向  WRH direct acting proportional directional valve can be used to control flow and direction

●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，4WRAE型的输入可选A1或F1  With built-in amplifier, 4wrae type input can be A1 or F1

型号说明 Model description

先导阀3DREP（E）6节流孔∶（装入A，B腔内）

功能说明 Function description

机能符号(简化符号） Functional symbol

电液控形式，外置放大器

电液控形式，内置放大器

液控形式

技术参数 Technical parameter

液压部分（在P=10MPa，矿物油40℃±5℃时测得）

电器部分