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備，廣泛應用于各種工業領域，以其結構簡單、操作方便、密封性能好以及適用范圍廣等優點，成為截斷、接通和調節管路中介質流量的關鍵組件。本文將詳細介紹電動蝶閥的工作原理，以便讀者更好地理解其運作機制。

　　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行旋轉。蝶閥的閥體設計成一個圓柱形通道，圓盤形的蝶板便在這個通道內旋轉。蝶板的旋轉角度范圍在0°至90°之間，這一設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行機構與蝶閥的協同運作。電動執行機構，通常是角行程電動執行機構，為蝶閥提供動力。當電動執行機構接收到開啟信號時，其內部的電機開始運轉，并通過減速裝置將旋轉運動傳遞給閥桿。減速裝置的作用是降低電機的轉速并增大扭矩，以滿足蝶閥開啟和關閉所需的力矩要求。閥桿隨后帶動蝶板在閥體圓柱形通道內繞著軸線旋轉。

　　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.

　　當蝶板旋轉到90°時，閥門處于全開狀態，此時流體通道完全打開，介質可以順暢地通過閥門。相反，當蝶板旋轉到0°時，閥門則完全關閉，截斷流體通道。在需要調節流量時，控制系統會根據預設的參數值信號，通過電動執行機構精確地控制電機的正反轉和轉速，從而驅動蝶板旋轉到相應的角度，達到調節流量的目的。

　　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點。蝶閥的密封主要依靠閥板與閥體之間的密封面來實現。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。當閥門關閉時，密封圈在閥板的擠壓下發生彈性變形，填充閥板與閥體之間的間隙，實現密封。硬密封型則采用金屬環密封，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，能夠實現對流體流量、壓力等參數的精準調節，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壁平齊，流阻小，具有較大的流通能力，可降低管道系統的能耗。

　　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異的性能，在化工、石油、電力、水利、食品醫藥等多個領域發揮著重要作用。在使用過程中，應嚴格按照安裝和維護要求進行操作和保養，以確保其長期穩定運行。

　　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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