全部 标题 作者
关键词 摘要

OALib Journal期刊
ISSN: 2333-9721
费用:99美元

查看量下载量

相关文章

更多...

负错位密封流动特性研究

DOI: 10.13334/j.0258-8013.pcsee.2015.12.018, PP. 3068-3074

Keywords: 密封,气流激振,流体动压效应,气流力,计算流体力学

Full-Text   Cite this paper   Add to My Lib

Abstract:

随着旋转机械工作介质向高参数方向发展,密封气流激振力成为影响旋转机械转子稳定性的重要因素之一。介质参数提高后,由密封流体动压产生的气体轴承效应增强,密封气流激振力增大。借鉴错位轴承理论,提出一种负错位密封结构,可降低流体动压效应,抑制密封气流激振力。应用CFD技术建立负错位密封与传统圆形密封流场特性求解模型,分析比较2种密封形式周向压力分布特性的差异,研究错位率、转速、偏心、压比等因素对2种密封形式气流力的影响规律。研究结果表明,负错位密封与传统圆形密封泄漏特性相当;与传统圆形密封相比,负错位密封周向压力差小,气流激振力小,负错位密封稳定性好。

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(增刊II):68-79.Cao Shuqian Chen Yushu.A review of modern rotor/seal dynamics[J].Engineering Mechanics,2009,26(Supplement II):68-79(in Chinese).
[2]  李雪松,李久华,黄典贵.迷宫密封齿型对转子动力学系数的影响[J].中国电机工程学报,2002,22(5):130-133.Li Xuesong,Li Jiuhua,Huang Diangui.The effect of the shape of labyrinth seals on rotordynamic coefficients[J].Proceedings of the CSEE,2002,22(5):130-133(in Chinese).
[3]  孙丹,杨建刚,曹浩,等.密封气流力试验识别方法及影响因素研究[J].中国电机工程学报,2011,31(5):96-100.Sun Dan,Yang Jiangang,Cao Hao,et al.Analysis on the experimental identification of seal force and its influence factors[J].Proceedings of the CSEE,2011,31(5):96-100(in Chinese).
[4]  曹浩,杨建刚,张万福,等.基于不平衡同频激励的密封动力特性形式识别[J].中国电机工程学报,2011,31(35):117-122.Cao Hao,Yang Jiangang,Zhang Wanfu,et al,Experimental identification method using unbalance synchronous frequency excitation for seals rotordynamic coefficients analysis[J].Proceedings of the CSEE,2011,31(35):117-122(in Chinese).
[5]  李建兰,郭绪宏,余辰,等.汽轮机调节级汽流激振突变模型研究[J].中国电机工程学报,2013,33(11):39-46.Li Jianlan,Guo Xuhong,Yu Chen,et al.Catastrophe model of steam flow excitation vibration in stream turbine governing stage[J].Proceedings of the CSEE,2013,33(11):39-46(in Chinese).
[6]  Muszynska A,Franklin W D,Bently D E.Rotor active anti-swiril control[J].Journal of Vibration Acoustics stress and Reliability in Design,1988,110(4):143-150.
[7]  Nielsen K K,Childs D W,Myllerup C W.Experimental and theoretical comparison of two swirl brake designs[J].Journal of Turbomachinery,2001,123(2):353-358.
[8]  N Kim,S -Y Park,D Rhode.Predicted effects of shunt injection on the rotordynamics of gas labyrinth seals[J].Journal of Engineering for Gas Turbines and Power,2003,125(1):167-174.
[9]  沈庆根,李烈荣,潘永密.迷宫密封中的气流激振及其反旋流措施[J].流体机械,1994,22(7):7-11.Shen Qinggen,Li Lierong,Pan Yongmi.Flow-induced force and anti-preswirl mechanism for labyrinth seals[J].Fluid Machinery,1994,22(7):7-11(in Chinese).
[10]  何立东.转子密封系统反旋流抑振的数值模拟[J].航空动力学报,1999,14(3):293-333.He Lidong.Numerical simulation of anti-swirl arrangements for suppressing rotor/seal instability[J].Journal of Aerospace Power,1999,14(3):293-333(in Chinese).
[11]  Von Pragenau G L,Damping seals for turbomachinery[R].NASA TP-1987.Alabama:George C.Marshall Space Flight Center,1982.
[12]  Schramm V,Willenborg K,Kim S,et al.Influence of a honeycomb facing on the flow through a stepped labyrinth seal[J].ASME J.Eng.Gas Turbines Power,2002,124(1):140-146.
[13]  何立东,袁新,尹新.蜂窝密封减振机理的实验研究[J].中国电机工程学报,2001,21(10):24-27.He Lidong,Yuan Xin,Yin Xin.Experimental invertigation on the suppression mechanism for honeycomb seals[J].Proceedings of the CSEE,2001,21(10):24-27(in Chinese).
[14]  Yan Xin,Li Jun,Feng Zhanping.Investigations on the rotordynamic characteristics of a hole-pattern seal using transient CFD and periodic circular orbit model[J].Journal of Vibration and Acoustics,2011,133(4):041007-1-9.
[15]  Vannini G,Cioncolini S,Vescovo G D,et al.Labyrinth seal and pocket damper seal high pressure rotordynamic test data[J].Journal of Engineering for Gas Turbines and Power,2014,136(2):022501.
[16]  李志刚,李军,丰镇平.高转速袋型阻尼密封泄漏的特性[J].航空动力学报,2012,27(12):2828-2835.Li Zhigang,Li Jun,Feng Zhenping.Leakage flow of pocket damper seal at high rotational speed[J].Journal of Aerospace Power,2012,27(12):2828-2835(in Chinese).
[17]  Bachschmid N,Pennacchi P,Vania A.Steam-whirl analysis in a high pressure cylinder of a turbo generator[J].Mechanical Systems and Signal Processing,2008,22(1):121-132.
[18]  席文奎,许吉敏,张宏涛,等.迷宫密封对高参数转子系统稳定性的影响分析及公里设计方法应用[J].中国电机工程学报,2013,33(5):102-111.Xi Wenkui,Xu Jimin,Zhang Hongtao,et al,Investigation on influence of labyrinth seal on stability of high-parameter rotor system and application of axiomatic design method[J].Proceedings of the CSEE,2013,33(5):102-111(in Chinese).
[19]  张万福,杨建刚,曹浩,等.偏心密封内切向气流力及其对稳定性影响的理论与试验研究[J].机械工程学报,2011,47(17):92-98.Zhang Wanfu,Yang Jiangang,Cao Hao,et al.Theoretical and experimental research of tangential fluid-induced force and its influence on stability in eccentric seal[J].Journal of Mechanical Engineering,2011,47(17):92-98(in Chinese).
[20]  何立东,夏松波.转子密封系统流体激振及其减振技术研究简评[J].振动工程学报,1999,12(1):64-72.He Lidong,Xia Songbo.Review on aerodynamic excitation and its elimination method in the rotor-seal system[J].Journal of Vibration Engineering,1999,12(1):64-72(in Chinese).
[21]  骆名文,丁学俊,祁小波,等.大型汽轮机汽流激振研究现状及展望[J].热能动力工程,2006,21(6):551-555.Luo Mingwen,Ding Xuejun,Qi Xiaobo,et al.The status quo and prospect concerning a study on steam flow excitations in large-sized steam turbine[J].Journal of Engineering for Thermal Energy and Power,2006,21(6):551-555(in Chinese).
[22]  虞烈,刘恒.轴承-转子系统动力学[M].西安:西安交通大学出版社,2001:5-15.Yu Lie,Liu Heng.Bearing and rotor dynamic[M].Xi'an:Xi'an Jiaotong University Press,2001:5-15(in Chinese).
[23]  Hirano T,Guo Z,Kirk R G.Application of computation fluid dynamics analysis for rotating machinery-part II:Labyrinth seal analysis[J].Journal of Engineering for Gas Turbines and Power,2005,127(4):820-82.

Full-Text

Contact Us

service@oalib.com

QQ:3279437679

WhatsApp +8615387084133