電液比例閥基本原理(參考版)
2025-05-06 18:44本頁面
【正文】 24 V DC 比例閥放大器 PROPORTIONAL VALVE AMPLIFIER In an increasing number of applications however, the input signal is generated by the machine controller itself (eg. a PLC Programmable Logic Controller). This can then be fed directly to the valve amplifier to generate the appropriate output. 在越來越多的應(yīng)用中 ， 輸入信號可以由控制器產(chǎn)生 （ 例如 ， 一個 PLC－ 可編程控制器 ） ， 可以直接輸入到閥放大器以產(chǎn)生適當(dāng)?shù)碾娏?。 24 V DC 比例閥放大器 PROPORTIONAL VALVE AMPLIFIER Increasing the input signal to the amplifier results in a corresponding increase in output current to the valve solenoid. 24 V DC 比例閥放大器 PROPORTIONAL VALVE AMPLIFIER Increasing the input signal to the amplifier results in a corresponding increase in output current to the valve solenoid. 24 V DC 比例閥放大器 PROPORTIONAL VALVE AMPLIFIER The relatively large current required to drive the valve solenoid (typically 2 to 3 amps) is provided by the power supply so the current required from the input signal device is very small (normally just a few milliamps). The input control device can therefore be a simple potentiometer. 一個相對較大的閥電磁鐵輸入電流 （ 通常 2到 3安培 ） 是由電源提供的 ， 所有輸入裝置的電流要求非常小 （ 一般僅有幾毫安 ） ， 因此輸入控制裝置可以是一個簡單的電位計 。 24 V DC 比例閥放大器 PROPORTIONAL VALVE AMPLIFIER 放大器地輸出 （ 電流 ） 由輸入信號控制 ， 所有零輸入信號 ， 電流輸出也是零 。 24 V DC 比例閥放大器 PROPORTIONAL VALVE AMPLIFIER Normally, the current flowing through the proportional solenoid will be controlled by some form of electronic amplifier. The amplifier itself will require a power supply (usually 12 or 24 VDC) and a mand input signal. 一般地 ， 通過比例閥電磁鐵地電流由一些形式地電子放大器控制 。 閥輸入信號 VALVE INPUT SIGNAL In theory, this could be achieved by using a dimmer switch type ponent (ie. a variable resistor). Practical problems such as heat generation and drift however mean that such a device would not normally be used except for the very simplest applications. 在理論上這可以通過使用一個調(diào)光開關(guān)式的元件來完成 （ 例如 ， 一個可變電阻 ） 。 此外 ， 所有這些控制功能可以使用輸入到閥的電子輸入信號被完成 ， 只需通過提供的到機械控制器的簡單接口 。 FORCE CONTROL Motion and force control can thus be achieved using proportional valves, and in some cases the same valve can be used for both motion and force control. This is usually referred to as ‘PQ’ control ie. the control of both pressure (P) and flow (Q). Furthermore, all of these control functions can be achieved using electronic inputs to the valve thus providing a simple interface to the machine controller. 運動和力的控制因此能夠通過使用比例閥來完成 ， 同時在某些場合同一個閥能夠同時用于運動控制和力控制 。 In such cases it is often necessary to control not only the maximum actuator pressure but also the rate at which the pressure is applied or removed. time Force FORCE CONTROL In fact the machine cycle may consist of a series of ramps and holding periods all of which can be achieved with just the one proportional valve. 實際上機器工作周期可能由一系列的斜坡和停止階段組成 ， 所有這些可以由一個比例閥來完成 。 （ 例如在壓機 中 或 注 塑 機 應(yīng) 用 ）Proportional valves can also be used to control the force output from an actuator (for example in press or plastic injection moulding applications) by controlling the pressure applied to the actuator. time Force FORCE CONTROL 在這樣的實例中 ， 不僅要求控制最大的執(zhí)行器壓力。 time Acceleration Velocity Distance MOTION CONTROL 2. Control of the actuator velocity and if necessary maintaining it constant with varying loads. 執(zhí)行器速度的控制 ， 如果必要維持其在變化負(fù)載下的穩(wěn)定 。 The proportional valve can be opened sufficiently slowly to provide a smooth acceleration of th
范文總結(jié)相關(guān)推薦
鄂ICP備17016276號-1