Effect of Hole Arrangement Modes on the Leakage and Rotordynamic Characteristics of Hole-Pattern Seals

ZHANG Zihan; CHEN Taowen; LI Zhigang; LI Jun

doi:10.7652/xjtuxb202404007

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Effect of Hole Arrangement Modes on the Leakage and Rotordynamic Characteristics of Hole-Pattern Seals

更新时间：2025-07-09

- Effect of Hole Arrangement Modes on the Leakage and Rotordynamic Characteristics of Hole-Pattern Seals
- Vol. 58, Issue 4, Pages: 75-84(2024)
- 作者机构：
  
  1. 西安交通大学叶轮机械研究所,西安,710049
  2. 杭州汽轮动力集团股份有限公司,杭州,310022
- 作者简介：
- 基金信息：
- DOI：10.7652/xjtuxb202404007
  CLC： TK262
- Online First：10 April 2024，
  
  Published：2024
- 稿件说明：
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ZHANG Zihan, CHEN Taowen, LI Zhigang, et al. Effect of Hole Arrangement Modes on the Leakage and Rotordynamic Characteristics of Hole-Pattern Seals[J]. 2024, 58(4): 75-84.
DOI：

ZHANG Zihan, CHEN Taowen, LI Zhigang, et al. Effect of Hole Arrangement Modes on the Leakage and Rotordynamic Characteristics of Hole-Pattern Seals[J]. 2024, 58(4): 75-84. DOI： 10.7652/xjtuxb202404007.

摘要

为揭示孔的排布方式对孔型阻尼密封性能的影响规律以及探究最佳排布方式

基于多频椭圆轨迹涡动模型非定常计算流体力学摄动数值方法

研究了不同孔径、孔排布方式下孔型阻尼密封的泄漏特性和动力学性能。采用孔型阻尼密封试件试验数据

验证了数值方法的可靠性和准确性

通过计算分析了不同孔径(3.175、12.268 mm)、孔排布方式(轴向顺排、周向顺排)、进口预旋(0、0.5)对孔型阻尼密封的泄漏量、动力特性系数和腔室动态压力的影响规律。数值结果表明:大孔径孔型阻尼密封动力学性能较优

具有较高的有效阻尼和较低的穿越频率

但封严性能较差

对应的泄漏量增加了6%～10%; 小孔径孔型阻尼密封的泄漏特性和动力学性能对孔的排布方式不敏感

泄漏量偏差小于0.5%

动力特性系数偏差小于 7%; 对于大孔径孔型阻尼密封

采用周向顺排的方式可获得更好的封严性能以及更优的动力学性能

泄漏量可降低4%

有效阻尼的穿越频率也得到显著减小。该研究可为孔型阻尼密封的设计提供参考。

Abstract

To reveal the effect of hole arrangement modes on the performance of hole-pattern seals and explore the optimal arrangement mode

a transient computational fluid dynamics(CFD)perturbation method based on the multiple-frequency elliptical-orbit rotor whirling model was adopted to investigate the leakage and rotordynamic characteristics of hole-pattern seals given different hole diameters and arrangement modes. The reliability and accuracy of the numerical method were validated by the experimental data of hole-pattern seals. The effects of hole diameters(3.175

12.268 mm)

arrangement modes(axial arrangement

circumferential arrangement)

and inlet preswirl(0

0.5)on the leakage

rotordynamic characteristics

and cavity dynamic pressure were analyzed through calculations. The numerical results show that large-diameter hole-pattern seals have better rotordynamic characteristics

higher effective damping

and lower crossover frequency but poorer sealing performance

with the corresponding leakage increase of 6% to 10%. The leakage and rotordynamic characteristics of small-diameter hole-pattern seals are insensitive to hole arrangement modes

with a leakage difference of less than 0.5% and the rotordynamic characteristics difference of less than 7%. For large-diameter hole-pattern seals

better sealing performance and rotordynamic characteristics can be obtained with the circumferential arrangement of holes. The leakage can be reduced by 4% and the crossover frequency can be significantly reduced. The research can provide references for the design of hole-pattern seals.

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references

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