电动蝶阀的工作原理详解

　　Detailed explanation of the working principle of electric butterfly valve

　　电动蝶阀，作为一种重要的流体控制设备，广泛应用于各种工业领域，以其结构简单、操作方便、密封性能好以及适用范围广等优点，成为截断、接通和调节管路中介质流量的关键组件。本文将详细介绍电动蝶阀的工作原理，以便读者更好地理解其运作机制。

　　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.

　　电动蝶阀的核心部件是一个圆形的蝶板，这个蝶板安装在管道的直径方向上，并能够绕着一个固定的轴线进行旋转。蝶阀的阀体设计成一个圆柱形通道，圆盘形的蝶板便在这个通道内旋转。蝶板的旋转角度范围在0°至90°之间，这一设计使得电动蝶阀能够以简单而高效的方式控制流体的流动。

　　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.

　　电动蝶阀的工作原理主要基于电动执行机构与蝶阀的协同运作。电动执行机构，通常是角行程电动执行机构，为蝶阀提供动力。当电动执行机构接收到开启信号时，其内部的电机开始运转，并通过减速装置将旋转运动传递给阀杆。减速装置的作用是降低电机的转速并增大扭矩，以满足蝶阀开启和关闭所需的力矩要求。阀杆随后带动蝶板在阀体圆柱形通道内绕着轴线旋转。

　　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.

　　当蝶板旋转到90°时，阀门处于全开状态，此时流体通道完全打开，介质可以顺畅地通过阀门。相反，当蝶板旋转到0°时，阀门则完全关闭，截断流体通道。在需要调节流量时，控制系统会根据预设的参数值信号，通过电动执行机构精确地控制电机的正反转和转速，从而驱动蝶板旋转到相应的角度，达到调节流量的目的。

　　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.

　　电动蝶阀的密封性能是其另一大优点。蝶阀的密封主要依靠阀板与阀体之间的密封面来实现。常见的密封形式有软密封型和硬密封型两种。软密封型通常采用橡胶密封圈，密封圈可以镶嵌在阀体上或附在蝶板周边。当阀门关闭时，密封圈在阀板的挤压下发生弹性变形，填充阀板与阀体之间的间隙，实现密封。硬密封型则采用金属环密封，一般适用于高温、高压等特殊工况。

　　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.

　　电动蝶阀的控制精度高，能够实现对流体流量、压力等参数的精准调节，满足不同工艺要求。同时，其流通能力大，蝶板开启时几乎与管道内壁平齐，流阻小，具有较大的流通能力，可降低管道系统的能耗。

　　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.

　　电动蝶阀以其独特的工作原理和优异的性能，在化工、石油、电力、水利、食品医药等多个领域发挥着重要作用。在使用过程中，应严格按照安装和维护要求进行操作和保养，以确保其长期稳定运行。

　　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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