關(guān)于比例閥，你想知道的一切在這里（中英文）
什么是比例控制閥以及比例閥的作用是什么
What is a proportional control valve and what is the function of a proportional valve
比例閥是一種能夠響應(yīng)電輸入的變化而改變輸出的閥門(mén)。這些閥也稱為電液閥，它們與液壓伺服閥有一些相似之處，都是電控的。在該閥門(mén)中，閥門(mén)的閥芯由螺線管驅(qū)動(dòng)。伺服閥和比例閥之間的主要區(qū)別在于伺服閥用于閉環(huán)系統(tǒng)，而比例閥用于開(kāi)環(huán)和閉環(huán)系統(tǒng)。比例閥可用作方向控制閥或壓力控制閥，但大多數(shù)這些閥用作方向控制閥。驅(qū)動(dòng)是在電信號(hào)的幫助下完成的。閥門(mén)的流向和流量受控制信號(hào)的影響。
A proportional valve is a valve that is capable to change the output, in response to the variation of electrical input. These valves are also called electrohydraulic valves and they have some similarities with the hydraulic servo valves like both of them are electrically controlled. In this valve, the spool of the valve is driven with the help of a solenoid. The major difference between a servo valve and a proportional valve is servo valves are used in closed-loop systems, whereas proportional valves are used in open and closed-loop systems. Proportional valves can be used as a direction control or pressure control valve but mostly these valves are used as direction control valves. The actuation is done with the help of an electric signal. The flow direction and flow rate of the valve are influenced by the control signal.
比例電磁閥有哪些特點(diǎn)
What are the features of a proportional solenoid valve
這些閥門(mén)具有閉環(huán)控制系統(tǒng)，因此閥門(mén)是借助傳感器的電氣輸入來(lái)控制的。由于這一特性，比例電磁閥被用于許多應(yīng)用。這些閥門(mén)還具有某些安全功能，例如，在斷電或電氣輸入中斷的情況下，閥門(mén)將立即關(guān)閉。比例電磁閥壽命長(zhǎng)，只需較少的維護(hù)。電磁操作器只有一個(gè)運(yùn)動(dòng)部件。
These valves have a closed-loop control system, so the valves are controlled by the help of electrical inputs from the sensor. Because of this feature, the proportional solenoid valves are used for many applications. These valves also have certain safety features like, in case of power failure or if the electrical input is interrupted then the valve will close immediately. Proportional solenoid valves have a long life and it only needs less maintenance. The solenoid operator has only one moving part
比例閥是如何構(gòu)造的
How proportional valves are constructed
在比例閥中，閥芯由硬化鋼制成，閥體由高級(jí)液壓鑄件制成，并涂漆。電磁閥經(jīng)過(guò)鍍鋅處理，電子設(shè)備外殼由鋁制成。比例閥芯在鑄造體內(nèi)滑動(dòng)。它們的結(jié)構(gòu)與方向控制閥類(lèi)似，非常堅(jiān)固。這些閥門(mén)具有高流通能力，而且也很經(jīng)濟(jì)。節(jié)流區(qū)域由閥芯上切出的槽口形成。凹口尺寸和幾何形狀決定給定外殼的流通能力。
In a proportional valve, the spool is made up of hardened steel and the body is made up of high-grade hydraulic casting and it is painted. The solenoids are zinc coated and the housing for the electronic is made up of aluminum. The proportional spool slide in the cast body. Their construction is robust similar to the directional control valves. These valves have high flow capacity and they are economical too. The throttle area is formed by notches cut into the spool. The notch size and geometry determine the flow capacity of a given housing.
比例閥的工作原理
How proportional valve works
比例流量控制閥可以被認(rèn)為是液壓閥驅(qū)動(dòng)與電子控制的結(jié)合。通過(guò)使用比例閥來(lái)減少液壓回路，當(dāng)使用比例閥時(shí)，它將減少系統(tǒng)中的組件數(shù)量。使用比例閥將提高系統(tǒng)的精度和效率。比例方向控制閥將根據(jù)輸入電信號(hào)改變流體流量。這些閥門(mén)產(chǎn)生與電子控制輸入成比例的輸出。輸出將采用三種形式：方向、壓力和流量。閥門(mén)中的線圈主要以直流電運(yùn)行，并且可以通過(guò)改變電壓來(lái)運(yùn)行。這將產(chǎn)生變化的力，并且該力用于移動(dòng)線軸。這些閥門(mén)具有高效率和準(zhǔn)確性，遠(yuǎn)程激活是該閥門(mén)的另一個(gè)優(yōu)點(diǎn)。這些閥門(mén)能夠控制氣缸或其他液壓馬達(dá)。
The proportional flow control valve can be considered as the combination of the hydraulic valve actuation with advanced electronic control. The hydraulic circuitry is reduced by using a proportional valve, when a proportional valve is used it will reduce the number of components in a system. The accuracy and efficiency of the system will increase by using a proportional valve. A proportional directional control valve would vary the fluid flow according to the input electrical signal. These valves produce output proportionally to the electronically controlled input. The output will be in three forms they are direction, pressure, and flow. The coils in the valves mostly operate in DC and it could be by varying voltages. This would create a varying force and this force is used to shift the spool. These valves have high efficiency and accuracy and remote activation is another advantage of this valve. These valves are capable to control cylinders or other hydraulic motors.
閥門(mén)的操作是通過(guò)從外部設(shè)備接收到的信號(hào)來(lái)進(jìn)行的，該設(shè)備可以是 PLC、計(jì)算機(jī)或電位計(jì)。控制裝置將向閥門(mén)驅(qū)動(dòng)卡提供電信號(hào)，并向閥門(mén)電磁閥發(fā)送電流信號(hào)。由于作用在其上的力，閥芯將發(fā)生移動(dòng)，并在泵和執(zhí)行器端口之間形成一條流路。根據(jù)輸入的輸入信號(hào)，閥芯發(fā)生換檔。傳感器用于檢查閥芯運(yùn)動(dòng)。
The operation of the valve takes place by a signal that is received from an outside device the device could be a PLC, computer, or potentiometer. The control device will give the electrical signals to the valve driver card and it would send a current signal to the valve solenoid. The spool will be shifted because of the force that acts on it and a flow path is created between the pump and the actuator port. According to the input in-put signal, the spool shifting takes place. A transducer is used to check the spool movement.
如何選擇比例控制閥
How to select a proportional control valve
? 可根據(jù)用于流量或壓力控制等過(guò)程進(jìn)行選擇
? 檢查系統(tǒng)的工作溫度是否適合比例閥
? 檢查重復(fù)性，即閥門(mén)的流量
? 反向靈敏度是改變流量所需的電輸入的變化
? 閾值，是從零位置開(kāi)始流量所需的電輸入。
? It can be selected according to the process that is used for like flow or pressure control
? Check whether the operating temperature of the system is suitable for the proportional valve
? Check the repeatability it is the flow rate of the valve
? Reverse sensitivity is the change in the electrical input that is required to change the flow rate
? Threshold, it is the electrical input that is necessary for the flow from zero position.
什么是液壓比例閥
What is a hydraulic proportional valve
比例閥用于液壓系統(tǒng)，因?yàn)檫@些閥能夠根據(jù)接收到的輸入多次定位閥芯。這些閥門(mén)用于需要不止一種執(zhí)行器速度的電路中。比例閥可用于液壓系統(tǒng)中，以控制壓力、流量和方向。通過(guò)使用該閥門(mén)，系統(tǒng)的效率將會(huì)提高。因此，通過(guò)使用這個(gè)單一閥門(mén)，可以控制流量、壓力和方向，這也簡(jiǎn)化了電路。
Proportional valves are used in hydraulic systems because these valves are capable to position the spool many times according to the received input. These valves are used in circuits that need more than one speed of actuators. Proportional valves can be used in the hydraulic system so that it can control the pressure, flow, and direction. By using this valve the efficiency of the system will increase. So by using this single valve, we can control the flow, pressure, and direction, and this would also simply the circuit.
比例閥有哪些類(lèi)型
What are the types of proportional valves
比例方向控制閥
Proportional directional control valve
這些閥門(mén)在許多液壓應(yīng)用中用于方向控制。這些閥門(mén)主要用于閉環(huán)應(yīng)用。某些類(lèi)型的比例方向控制閥沒(méi)有任何閥芯反饋，這些閥用于開(kāi)環(huán)控制應(yīng)用，并且可以是直接操作或先導(dǎo)操作。
These valves are used in many hydraulic applications for direction control. Mostly these valves are used in closed-loop applications. Certain type of proportional direction control valves doesn’t have any spool feedback and these are for open-loop control applications and they can be direct or pilot operated.
比例流量控制閥
Proportional flow control valve
集成壓縮機(jī)或靜壓裝置用于限制節(jié)流孔上的壓力。因此，當(dāng)負(fù)載力發(fā)生變化時(shí)，流量不會(huì)發(fā)生任何變化。
An integrated compressor or hydrostatic is used to limit the pressure across the throttling orifice. So when the load force change there won’t be any change in the flow.
比例溢流閥
Proportional pressure relief valve
這些閥門(mén)可以限制液壓回路中的壓力，并且該限制通過(guò)電子控制進(jìn)行調(diào)節(jié)。泄壓過(guò)程中會(huì)有多余的流量，多余的流量被送到儲(chǔ)罐。
These valves can limit the pressure in a hydraulic circuit and this limit is adjusted by electronic control. There would be excess flow during the pressure-relieving process and this excess flow is sent to the reservoir tank
比例控制閥有哪些應(yīng)用
What are the applications of proportional control valve
? 這些閥門(mén)用于需要高分辨率、大流量和低滯后的應(yīng)用
? 用于液壓系統(tǒng)
? 土方機(jī)械
? 機(jī)器人技術(shù)
? 機(jī)床和造紙生產(chǎn)
? These valves are used in applications where high resolution, high volume flow, and low hysteresis is needed
? Used in hydraulic systems
? Earthmoving machines
? Robotics
? Machine tools and paper production
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