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本文介绍了一种新型电磁先导式真空止逆阀的结构和工作原理，建立了阀工作过程的动力学模型和动态过程方程组。通过数值求解得出了阀关、开过程的动态曲线及动作时间等重要参数。
This paper introduces the structure and working principle of a new electromagnetic pilot operated vacuum check valve, and establishes the dynamic model and the dynamic process equations of the valve working process. Through the numerical solution, the key parameters such as the valve closing and opening dynamic curves and the operating time are obtained.