電動蝶閥的工作原理詳解

　　Detailed explanation of the working principle of electric butterfly valve

　　電動蝶閥，作為一種重要的流體控制設(shè)備，廣泛應(yīng)用于各種工業(yè)領(lǐng)域，以其結(jié)構(gòu)簡單、操作方便、密封性能好以及適用范圍廣等優(yōu)點，成為截斷、接通和調(diào)節(jié)管路中介質(zhì)流量的關(guān)鍵組件。本文將詳細(xì)介紹電動蝶閥的工作原理，以便讀者更好地理解其運作機(jī)制。

　　Electric butterfly valve, as an important fluid control equipment, is widely used in various industrial fields. With its advantages of simple structure, easy operation, good sealing performance, and wide applicability, it has become a key component for cutting off, connecting, and regulating the flow rate of media in pipelines. This article will provide a detailed introduction to the working principle of electric butterfly valves, in order to help readers better understand their operating mechanism.

　　電動蝶閥的核心部件是一個圓形的蝶板，這個蝶板安裝在管道的直徑方向上，并能夠繞著一個固定的軸線進(jìn)行旋轉(zhuǎn)。蝶閥的閥體設(shè)計成一個圓柱形通道，圓盤形的蝶板便在這個通道內(nèi)旋轉(zhuǎn)。蝶板的旋轉(zhuǎn)角度范圍在0°至90°之間，這一設(shè)計使得電動蝶閥能夠以簡單而高效的方式控制流體的流動。

　　The core component of an electric butterfly valve is a circular butterfly plate, which is installed in the diameter direction of the pipeline and can rotate around a fixed axis. The valve body of the butterfly valve is designed as a cylindrical channel, and the disc-shaped butterfly plate rotates within this channel. The rotation angle range of the butterfly valve is between 0 ° and 90 °, which enables the electric butterfly valve to control fluid flow in a simple and efficient way.

　　電動蝶閥的工作原理主要基于電動執(zhí)行機(jī)構(gòu)與蝶閥的協(xié)同運作。電動執(zhí)行機(jī)構(gòu)，通常是角行程電動執(zhí)行機(jī)構(gòu)，為蝶閥提供動力。當(dāng)電動執(zhí)行機(jī)構(gòu)接收到開啟信號時，其內(nèi)部的電機(jī)開始運轉(zhuǎn)，并通過減速裝置將旋轉(zhuǎn)運動傳遞給閥桿。減速裝置的作用是降低電機(jī)的轉(zhuǎn)速并增大扭矩，以滿足蝶閥開啟和關(guān)閉所需的力矩要求。閥桿隨后帶動蝶板在閥體圓柱形通道內(nèi)繞著軸線旋轉(zhuǎn)。

　　The working principle of electric butterfly valve is mainly based on the coordinated operation of electric actuator and butterfly valve. Electric actuators, usually angular stroke electric actuators, provide power for butterfly valves. When the electric actuator receives the opening signal, its internal motor starts running and transmits the rotational motion to the valve stem through the deceleration device. The function of the deceleration device is to reduce the speed of the motor and increase the torque to meet the torque requirements for opening and closing the butterfly valve. The valve stem then drives the butterfly plate to rotate around the axis in the cylindrical channel of the valve body.

　　當(dāng)?shù)逍D(zhuǎn)到90°時，閥門處于全開狀態(tài)，此時流體通道完全打開，介質(zhì)可以順暢地通過閥門。相反，當(dāng)?shù)逍D(zhuǎn)到0°時，閥門則完全關(guān)閉，截斷流體通道。在需要調(diào)節(jié)流量時，控制系統(tǒng)會根據(jù)預(yù)設(shè)的參數(shù)值信號，通過電動執(zhí)行機(jī)構(gòu)精確地控制電機(jī)的正反轉(zhuǎn)和轉(zhuǎn)速，從而驅(qū)動蝶板旋轉(zhuǎn)到相應(yīng)的角度，達(dá)到調(diào)節(jié)流量的目的。

　　When the butterfly plate rotates to 90 °, the valve is fully open, and the fluid channel is fully opened, allowing the medium to pass smoothly through the valve. On the contrary, when the butterfly plate rotates to 0 °, the valve is completely closed, cutting off the fluid channel. When it is necessary to adjust the flow rate, the control system will precisely control the forward and reverse rotation and speed of the motor through the electric actuator based on the preset parameter value signal, so as to drive the butterfly plate to rotate to the corresponding angle and achieve the purpose of adjusting the flow rate.

　　電動蝶閥的密封性能是其另一大優(yōu)點。蝶閥的密封主要依靠閥板與閥體之間的密封面來實現(xiàn)。常見的密封形式有軟密封型和硬密封型兩種。軟密封型通常采用橡膠密封圈，密封圈可以鑲嵌在閥體上或附在蝶板周邊。當(dāng)閥門關(guān)閉時，密封圈在閥板的擠壓下發(fā)生彈性變形，填充閥板與閥體之間的間隙，實現(xiàn)密封。硬密封型則采用金屬環(huán)密封，一般適用于高溫、高壓等特殊工況。

　　The sealing performance of electric butterfly valves is another major advantage. The sealing of butterfly valves mainly relies on the sealing surface between the valve plate and the valve body. There are two common sealing forms: soft sealing and hard sealing. Soft sealing type usually uses rubber sealing rings, which can be embedded on the valve body or attached to the periphery of the butterfly plate. When the valve is closed, the sealing ring undergoes elastic deformation under the pressure of the valve plate, filling the gap between the valve plate and the valve body to achieve sealing. The hard seal type adopts metal ring sealing, which is generally suitable for special working conditions such as high temperature and high pressure.

　　電動蝶閥的控制精度高，能夠?qū)崿F(xiàn)對流體流量、壓力等參數(shù)的精準(zhǔn)調(diào)節(jié)，滿足不同工藝要求。同時，其流通能力大，蝶板開啟時幾乎與管道內(nèi)壁平齊，流阻小，具有較大的流通能力，可降低管道系統(tǒng)的能耗。

　　Electric butterfly valves have high control accuracy and can achieve precise adjustment of fluid flow rate, pressure and other parameters to meet different process requirements. At the same time, it has a high flow capacity, with the butterfly plate almost flush with the inner wall of the pipeline when opened, low flow resistance, and a large flow capacity, which can reduce the energy consumption of the pipeline system.

　　電動蝶閥以其獨特的工作原理和優(yōu)異的性能，在化工、石油、電力、水利、食品醫(yī)藥等多個領(lǐng)域發(fā)揮著重要作用。在使用過程中，應(yīng)嚴(yán)格按照安裝和維護(hù)要求進(jìn)行操作和保養(yǎng)，以確保其長期穩(wěn)定運行。

　　Electric butterfly valves play an important role in various fields such as chemical, petroleum, power, water conservancy, food and medicine due to their unique working principle and excellent performance. During use, it is necessary to strictly follow the installation and maintenance requirements for operation and maintenance to ensure its long-term stable operation.

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