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

doi:10.13675/j.cnki.tjjs.190373

Journal of Propulsion Technology ›› 2021, Vol. 42 ›› Issue (2): 406-414.DOI: 10.13675/j.cnki.tjjs.190373

• Structure, Strength and Reliablity • Previous Articles Next Articles

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

1.Key Laboratory of Advanced Measurement and Test Technique for Aviation Propulsion System，Liaoning Province，School of Aero-Engine，Shenyang Aerospace University，Shenyang 110136，China;2.AECC Sichuan Gas Turbine Establishment，Chengdu 610500，China

Online:2021-02-02 Published:2021-08-15

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

孙丹¹，王平¹，王旭东²，赵欢¹，张国臣¹

1.沈阳航空航天大学航空发动机学院辽宁省航空推进系统先进测试技术重点实验室，辽宁沈阳 110136;2.中国航发四川燃气涡轮研究院，四川成都 610500

基金资助:
国家自然科学基金（51675351）；中国博士后科学基金（2018M633572）；辽宁省高等学校创新人才支持计划项目（LR2016033）。

Abstract

Abstract: 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. The effects of rotor speed， import/export pressure ratio and eccentricity on floating concentric force of new convergent pocket seal and traditional labyrinth seal were studied. The effects of vortex frequency on the dynamic characteristic coefficient of new convergent pocket seal and traditional labyrinth seal were 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 decreases， the effective stiffness coefficient of the new convergent pocket seal increases. At the same vortex frequency， the effective stiffness coefficient of the new convergent pocket seal is 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.

Key words: Floating convergent pocket seal;Floating concentric force;Rotordynamic characteristics coefficient;Adaptive concentric performance;Labyrinth seal

摘要： 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、进出口压比、偏心率的增加，新型收敛袋型密封产生的浮动同心力增大；相同工况下，新型收敛袋型密封的浮动同心力大于传统迷宫密封的；随着转子涡动频率的增加，传统迷宫密封的有效刚度系数减小，新型收敛袋型密封的有效刚度系数增大，同一涡动频率下，新型收敛袋型密封的有效刚度系数大于传统迷宫密封的。新型浮动式收敛袋型密封具有良好的自适应同心性能。

关键词: 浮动式收敛袋型密封;浮动同心力;动力特性系数;自适应同心性能;迷宫密封

SUN Dan¹, WANG Ping¹, WANG Xu-dong², ZHAO Huan¹, ZHANG Guo-chen¹. Investigation on Rotordynamic Characteristics and Adaptive Concentric Performance of a New Type of Floating Convergent Pocket Seal[J]. Journal of Propulsion Technology, 2021, 42(2): 406-414.

孙丹，王平，王旭东，赵欢，张国臣. 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[J]. 推进技术, 2021, 42(2): 406-414.

References

[1] 曹树谦，陈予恕. 现代密封转子动力学研究综述［J］. 工程力学， 2009， 26（S2）： 68-79.
[2] 高庆，李军. 涡轮蜂窝面径向轮缘密封封严性能的数值研究［J］. 推进技术， 2016， 37（5）： 938-944.
[3] 孙丹，卢江，艾延廷，等. 偏心密封动力特性分析与新型自同心密封研究［J］. 推进技术， 2018， 39（9）： 2075-2084.
[4] 李承曦，何立东. 蜂窝密封动力特性参数的CFD数值分析方法［J］. 北京化工大学学报（自然科学版）， 2010， 37（1）： 117-121.
[5] LI Zhi-gang， LI Jun， FENG Zhen-ping. Numerical Investigation on Discharge Behavior and Predication Formula Establishment of Leakage Flow Rate of Honeycomb Seal［J］. Journal of Mechanical Engineering， 2011， 47（2）.
[6] Arora G K， Proctor M P， Steinetz B M， et al. Pressure Balanced ， Low Hysteresis Finger Seal Test Results［R］. AIAA 99-2686.
[7] 晏鑫，李军，丰镇平. 孔型阻尼密封非定常气流激振特性的研究［J］. 工程热物理学报， 2014， 35（4）： 651-654.
[8] Vance J M， LI J. Test Results of a New Damper Seal for Vibration Reduction in Turbomachinery［J］. Journal of Engineering for Gas Turbines & Power， 1996， 118（4）.
[9] 李军，李志刚. 袋型阻尼密封泄漏流动和转子动力特性的研究进展［J］. 力学进展， 2011， 41（5）： 519-536.
[10] 吕江，何立东，吕成龙，等. 转子密封系统反旋流抑振的数值分析及实验研究［J］. 润滑与密封， 2015， 40（10）： 30-35.
[11] 孙丹，王双，艾延廷，等. 阻旋栅对密封静力与动力特性影响的数值分析与实验研究［J］. 航空学报， 2015， 36（9）： 3002-3011.
[12] SUN Dan， WANG Xu-dong. A Novel Negative Dislocated Seal and Influential Parameter Analyses of Static/Rotordynamic Characteristics［J］. Journal of Mechanical Science and Technology， 2018， 32（9）： 4125-4134.
[13] Iwatsubo T. Evaluation of Instability Forces of Labyrinth Seals in Turbines or Compressors［J］. Journal of Engineering for Gas Turbines and Power， 1980， 35（10）： 338-343.
[14] Childs D W， Scharrer J K. An Iwatsubo-Based Solution for Labyrinth Seals： Comparison to Experimental Results ［J］. Journal of Engineering for Gas Turbines & Power， 1984， 108（2）： 325-331.
[15] Childs D W， Scharrer J K. Theory Versus Experiment for the Rotordynamic Coefficients of Labyrinth Gas Seals， Part II： A Comparison to Experiment［J］. Journal of Vibration， Acoustics， Stress， and Reliability in Design， 1988， 110（7）： 281-287.
[16] Mihai Arqhir， Jean Frene. A Bulk-Flow Analysis of Static and Dynamic Characteristics of Eccentric Circumferentially： Grooved Liquid Annular Seals［J］. Journal of Tribology， 2004， 126（4）： 317-324.
[17] 晏鑫，蒋玉娥，李军. 迷宫密封转子动力学特性的数值模拟［J］. 热能动力工程， 2009， 24（5）： 566-570.
[18] Hirano T， Guo Zenglin， Kirk R G. Application of Computational Fluid Dynamics Analysis for Rotating Machinery， Part Ⅱ： Labyrinth Seal Analysis ［J］. Journal of Engineering for Gas Turbines and Power， 2005， 127（4）： 820-826.
[19] 孙丹，王旭东，李胜远，等. 透平机械动密封动力特性数值方法研究［J］. 推进技术， 2018， 39（8）： 1829-1840.
[20] Thorat M R ， Childs D W . Predicted Rotordynamic Behavior of a Labyrinth Seal as Rotor Surface Speed Approaches Mach 1［J］. Journal of Engineering for Gas Turbines and Power， 2010， 132（11）.
[21] Vannini G ， Thorat M R ， Childs D W ， et al. Impact of Frequency Dependence of Gas Labyrinth Seal Rotordynamic Coefficients on Centrifugal Compressor Stability［R］. ASME GT 2010-22039.
[22] Chochua G， Soulas T A. Numerical Modeling of Rotordynamic Coefficients for Deliberately Roughened Stator Gas Annular Seals［J］. Journal of Tribology， 2007， 129（2）： 424-429.
[23] LI Zhi-gang， LI Jun， FENG Zhen-ping. Investigations on the Rotordynamic Coefficient of Pocket Damper Seals Using the Multi-Frequency， One-Dimensional， Whirling Orbit Model and RANS Solutions［J］. Journal of Engineering for Gas Turbines and Power， 2012， 134（10）.
[24] LI Zhi-gang， LI Jun， FENG Zhen-ping. Numerical Investigations on the Leakage and Rotordynamic Characteristics of Pocket Damper Seals， Part I： Effects of Pressure Ratio， Rotational Speed， and Inlet Preswirl ［J］. Journal of Engineering for Gas Turbines and Power， 2014， 136（3）.
[25] Ertas B H， Delgado A， Vannini G. Rotordynamic Force Coefficients for Three Types of Annular Gas Seals with Inlet Preswirl and High Differential Pressure Ratio［J］. Journal of Engineering for Gas Turbines and Power， 2012， 134（4）.
[26] 孙丹，李胜远，艾延廷，等. 袋型阻尼密封动力特性分析及对转子稳定性的影响［J］. 中国电机工程学报， 2018， 38（12）： 3621-3628.
[27] Camatti M， Vannini G， Fulton J W， et al. Instability of a High Pressure Compressor Equipped with Honeycomb Seals［C］. New York： Turbomachinery Symposium， 2003.
[28] 李典来. 液氧涡轮泵变腔室长度迷宫密封特性研究［D］. 哈尔滨：哈尔滨工业大学， 2016.

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

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

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