新型浮动式收敛袋型密封动力特性与自适应同心性能数值研究

提出新型浮动式收敛袋型密封结构,建立新型收敛袋型密封与传统迷宫密封多频椭圆涡动动力特性求解模型,研究转速、进出口压比及偏心率对新型收敛袋型密封与传统迷宫密封浮动同心力的影响,对比分析涡动频率对新型收敛袋型密封与传统迷宫密封动力特性系数的影响,基于有效刚度系数定量分析浮动密封的自适应同心性能.研究结果表明:随着转速、进出...

Investigation on Rotordynamic Characteristics and Adaptive Concentric performance of a New Type of Floating Convergent Pocket Seal

In this paper, a new type of floating convergent pocket seal structure was proposed. A new type of convergent pocket seal and traditional labyrinth seal multi-frequency elliptic vortex dynamic characteristic solution model was established by using unsteady dynamic mesh technology. On the basis of verifying the accuracy of the numerical solution model, the effect of rotor speed, import/export pressure ratio and eccentricity on floating concentric force of new convergent pocket seal and traditional labyrinth seal was studied. The effect of vortex frequency on the dynamic characteristic coefficient of new convergent pocket seal and traditional labyrinth seal was compared and analyzed. The adaptive concentric performance of floating seal was quantitatively analyzed based on the effective stiffness coefficient. The results show that with the increase of rotor speed, import/export pressure ratio and eccentricity, the floating concentric force of the new convergent pocket seal increases. Under the same working conditions, the floating concentric force of the new convergent pocket seal is larger than that of the traditional labyrinth seal. With the increase of rotor vortex frequency, the effective stiffness coefficient of the traditional labyrinth decrease, the effective stiffness coefficient of the new convergent pocket seal increase. At the same vortex frequency, the effective stiffness coefficient of the new convergent pocket seal are larger than that of the traditional labyrinth seal. Using a new type of convergent pocket seal as floating self-concentric seal floating seal ring can effectively improve its adaptive concentric performance.