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| 结构参数对直齿/倾斜齿迷宫密封动静特性影响规律 |
| Static and dynamic characteristics of labyrinth seals with straight and inclined teeth |
| 投稿时间：2023-05-25 |
| DOI：10.13259/j.cnki.eri.2026.02.006 |
| 中文关键词: 迷宫密封 倾斜齿 泄漏性能 动力特性 计算流体力学 |
| 英文关键词:labyrinth seal inclined tooth leakage performance dynamic characteristics computational fluid dynamics |
| 基金项目:国家自然科学基金资助项目（51875361）；上海市自然科学基金资助项目（20ZR1439200） |
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| 中文摘要: |
| 在建立倾斜齿迷宫密封数值模型的基础上，基于多频椭圆涡动模型和计算流体力学方法研究了结构参数（密封间隙、齿数、腔深以及齿尖宽）对倾斜齿迷宫密封泄漏与动力特性的影响。结果表明：密封间隙和齿数是影响倾斜齿迷宫密封泄漏特性的关键参数，而密封腔深和齿尖宽对倾斜齿迷宫密封泄漏特性影响相对较小；当几何参数一定时，相较直齿迷宫密封，26齿的前倾齿迷宫密封对抑制泄漏更有效，可使泄漏量减少47.6%；在所测频率范围内，多齿数、低腔深的迷宫密封转子动力稳定性更佳；低涡动频率时，小间隙的迷宫密封更稳定；中高涡动频率时，长齿尖宽的迷宫密封更稳定。 |
| 英文摘要: |
| Based on the numerical models of inclined teeth labyrinth seals, this study investigates how geometric parameters including clearance, number of teeth, cavity depth, and tooth width affect the leakage and dynamic characteristics using the multiple frequencies elliptical whirling model and computational fluid dynamics method. The results indicate that clearance and number of teeth are the key parameters influencing leakage performance, whereas cavity depth and tooth width play relatively minor roles. Under identical geometric conditions, the forward inclined labyrinth seal with 26 teeth achieves the most effective leakage suppression, reducing leakage by 47.6% compared to the straight-tooth labyrinth seal. Within the tested frequency range, labyrinth seals with more teeth and shallower cavities exhibit better rotor dynamic stability. At low whirl amplitudes, seals with small clearance are more stable, while at medium to high whirl amplitudes, seals with longer tooth tips show improved stability. |
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