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本文针对迷宫气密封,利用两控制容积模型导出了基本方程;基于有限差分法得到了控室中回流速度,并将其引入模型之中,用摄动方法得到了密封的刚度、阻尼系数。结果比以前的单控容积模型更接近于实验值。
Aiming at the labyrinth gas seal, this paper derives the basic equations by using two control volume models. The backflow velocity in the control chamber is obtained based on the finite difference method and introduced into the model. The stiffness and damping coefficient of the seal are obtained by perturbation method. The result is closer to the experimental value than the previous single-control volume model.