轴间气膜密封周向相对滑动判定方法

黄玉辉; 苏华; 程卓一; 侯国强

doi:10.13700/j.bh.1001-5965.2020.0366

轴间气膜密封周向相对滑动判定方法

doi: 10.13700/j.bh.1001-5965.2020.0366

西北工业大学机电学院, 西安 710072

基金项目:

国家自然科学基金 51575445

详细信息

通讯作者:
苏华, E-mail: huasu@nwpu.edu.cn

中图分类号: V232;TH122
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- 被引次数: 0
出版历程
- 收稿日期: 2020-07-28
- 录用日期: 2020-10-30
- 网络出版日期: 2021-10-20

Judgment method of circumferential relative sliding of air film seal between shafts

School of Mechanical Engineering, Northwestern Polytechnical University, Xi'an 710072, China

Funds:

National Natural Science Foundation of China 51575445

More Information

Corresponding author: SU Hua, E-mail: huasu@nwpu.edu.cn

摘要

摘要:
为预判端面轴间气膜密封中密封环与外层转子之间是否产生周向相对滑动，提出了一种考虑离心膨胀效应的轴间气膜密封周向相对滑动判定方法。分析了密封环与外层转子之间产生周向相对滑动的力学机制，将密封环和外层转子离心膨胀简化为轴对称平面应力问题和轴对称平面应变问题。计算了密封环和外层转子的弹性变形刚度差异对膨胀变形及连接关系的影响，得到了密封环与外层转子产生临界滑动的工况区域。所提判定方法对工程中密封环的周向滑动问题提供了预测及指导。
- 离心膨胀 /
- 弹性变形 /
- 周向滑动 /
- 临界滑动转速 /
- 轴间密封
Abstract:
In order to predict whether there is relative sliding in the circumferential direction between the seal ring and the outer rotor in air film seal between shafts, a method for determining the circumferential sliding of air film seal between shafts considering centrifugal expansion effect is proposed. The mechanical mechanism of the circumferential sliding between seal ring and outer rotor is analyzed. The centrifugal expansion of seal ring and outer rotor is simplified into axisymmetric plane stress and axisymmetric plane strain. The influence of the difference of elastic deformation stiffness between seal ring and outer rotor on the expansion deformation and the connection relationship is calculated, and the critical sliding operating area between seal ring and rotor is obtained. The research method provides a prediction and guidance method for circumferential sliding of seal ring in engineering.
- centrifugal expansion /
- elastic deformation /
- circumferential sliding /
- critical sliding speed /
- shaft seal

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图 1 轴间密封结构示意图

Figure 1. Schematic of seal structure between shafts

下载: 全尺寸图片幻灯片

图 2 密封环

Figure 2. Seal ring

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图 3 密封环弹性模量和泊松比小于外层转子时套装面上径向膨胀变形

Figure 3. Radial expansion deformation on the sleeve surface when elastic modulus and Poisson's ratio of seal ring are smaller than outer rotor

下载: 全尺寸图片幻灯片

图 4 密封环弹性模量和泊松比大于外层转子时套装面上径向膨胀变形

Figure 4. Radial expansion deformation on sleeve surface when elastic modulus and Poisson's ratio of seal ring are larger than outer rotor

下载: 全尺寸图片幻灯片

图 5 密封环和外层转子材料性能相同时套装面上径向膨胀变形

Figure 5. Radial expansion deformation on sleeve surface with the same material properties of seal ring and outer rotor

下载: 全尺寸图片幻灯片

图 6 转子与轴承套装面径向膨胀变形比较^[18]

Figure 6. Comparison of radial expansion deformation of rotor and bearing on sleeve surface^[18]

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图 7 外层转子角加速度与临界滑动转速的关系

Figure 7. Relationship between angular acceleration of outer rotor and critical sliding speed

下载: 全尺寸图片幻灯片

表 1 密封环参数

Table 1. Parameters of seal ring

参数	符号
摩擦因数	μ
密封环宽度	B
无旋转时密封环外边界上的正压力	p
旋转时密封环外边界上的正压力	p_e
密封环的转动惯量	J
外层转子在ω角速度时的瞬时角加速度	α
密封环外半径	r₂
密封环内半径	r₁
密封环外圆周面积	S
密封环质量	m
最大静摩擦力与滑动摩擦力之间的比例系数	K
外层转子内半径	R₁
外层转子外半径	R₂

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表 2 计算参数(部分几何参数与图 1对应)

Table 2. Computational parameters(refer to Fig. 1)

参数	数值
摩擦因数μ	0.15
密封环外半径r₂/mm	76
密封环内半径r₁/mm	69
密封环宽度B/mm	10
外层转子最高转速n/(r·min^-1)	18 000
外层转子角加速度α/(rad·s^-2)	188.5
外层转子外半径R₂/mm	82
外层转子内半径R₁/mm	76

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表 3 材料性能参数一

Table 3. Material property parameters Ⅰ

参数	数值
密封环弹性模量E₁/GPa	14
密封环泊松比ν₁	0.25
密封环密度ρ₁/(g·cm^-3)	1.8
外层转子弹性模量E₂/GPa	209
外层转子泊松比ν₂	0.3
外层转子密度ρ₂/(g·cm^-3)	7.85

下载: 导出CSV

表 4 材料性能参数二

Table 4. Material property parameters Ⅱ

参数	数值
密封环弹性模量E₁/GPa	209
密封环泊松比ν₁	0.3
密封环密度ρ₁/(g·cm^-3)	7.85
外层转子弹性模量E₂/GPa	14
外层转子泊松比ν₂	0.25
外层转子密度ρ₂/(g·cm^-3)	1.8

下载: 导出CSV

表 5 材料性能参数三

Table 5. Material property parameters Ⅲ

参数	数值
密封环弹性模量E₁/GPa	209
密封环泊松比ν₁	0.3
密封环密度ρ₁/(g·cm^-3)	7.85
外层转子弹性模量E₂/GPa	209
外层转子泊松比ν₂	0.3
外层转子密度ρ₂/(g·cm^-3)	7.85

下载: 导出CSV

参考文献(20)

[1]	STEINETZ B M, HENDRICKS R C. Engine seal technology requirements to meet NASA's advanced subsonic technology program goals[J]. Journal of Propulsion and Power, 1996, 12(4): 786-793. doi: 10.2514/3.24102
[2]	STEINETZ B M, HENDRICKS R C, MUNSON J. Advanced seal technology role in meeting next generation turbine engine goals[C]//NASA Technical Memorandum Toulouse, 1998: 1-12.
[3]	胡绚, 罗贵火, 高德平. 航空发动机中介轴承的特性分析[J]. 航空动力学报, 2007, 22(3): 439-443. doi: 10.3969/j.issn.1000-8055.2007.03.019 HU X, LUO G H, GAO D P. Performance analysis of aero-engine intershaft bearing[J]. Journal of Aerospace Power, 2007, 22(3): 439-443(in Chinese). doi: 10.3969/j.issn.1000-8055.2007.03.019
[4]	HOLLOWAY G, MEHTA J, ROSADO L, et al. Rotating brush seal-experimental performance evaluation[C]//44th AIAA/ASME/SAE/ASEE Joint Propulsion Conference & Exhibit. Reston: AIAA, 2008: 21-23.
[5]	HOLLOWAY G, MEHTA J, ROSADO L, et al. Rotating intershaft brush seal for sealing between rotating shafts: Part 1-Experimental performance evaluation compared to mechanical design analysis[C]//43rd AIAA/ASME/SAE/ASEE Joint Propulsion Conference & Exhibit. Reston: AIAA, 2007: 1-19.
[6]	MEHTA J, HOLLOWAY G, ROSADO L, et al. Innovative rotating intershaft brush seal for sealing between rotating shafts. Part Ⅱ: Modeling of the brush seal leakage flows[C]//42nd AIAA/ASME/SAE/ASEE Joint Propulsion Conference & Exhibit. Reston: AIAA, 2006: 1-14.
[7]	HOLLOWAY G, MEHTA J, ROSADO L, et al. Innovative rotating intershaft brush seal for sealing between rotating shafts. Part Ⅰ-Mechanical design of the rotating brush seal[C]//42nd AIAA/ASME/SAE/ASEE Joint Propulsion Conference & Exhibit. Reston: AIAA, 2006: 1-21.
[8]	王之栎, 刘国西, 郭艳丽. 反转轴间气膜密封振动过程分析[J]. 振动与冲击, 2011, 30(2): 181-185. https://www.cnki.com.cn/Article/CJFDTOTAL-ZDCJ201102038.htm WANG Z L, LIU G X, GUO Y L. Vibration process analysis of a gas film seal in counter-rotating shafts[J]. Journal of Vibration and Shock, 2011, 30(2): 181-185(in Chinese). https://www.cnki.com.cn/Article/CJFDTOTAL-ZDCJ201102038.htm
[9]	王之栎, 侯景仁, 信琦. 反转轴间气密封研究[C]//第五届中日机械技术史及机械设计国际学术会议, 2005: 159-162. WANG Z L, HOU J R, XIN Q. Research for an air film seal between two contraty rotation shafts[C]//Proceedings of the Fifth China-Japan International Conference on History of Mechanical Technology and Mechanical Design, 2005: 159-162(in Chinese).
[10]	DIRUSSO E. Feasibility analysis of a spiral groove ring seal for counter-rotating shafts[J]. Journal of Aircraft, 1984, 21(8): 618-622. doi: 10.2514/3.45032
[11]	GAMBLE W L. Counterrotating intershaft seals for advanced engines[J]. Journal of Propulsion and Power, 1985, 1(6): 437-440. doi: 10.2514/3.22825
[12]	刘雨川. 端面气膜密封特性研究[D]. 北京: 北京航空航天大学, 1999: 33-35. https://d.wanfangdata.com.cn/thesis/Y336381 LIU Y C. Behavior of gas film face seal[D]. Beijing: Beihang University, 1999: 33-35(in Chinese). https://d.wanfangdata.com.cn/thesis/Y336381
[13]	吴宁兴, 赵宗坚. 反转轴间气膜密封可行性试验研究[J]. 航空发动机, 2001, 27(4): 20-25. https://www.cnki.com.cn/Article/CJFDTOTAL-HKFJ200104004.htm WU N X, ZHAO Z J. Feasibility test study of counter-rotating intershaft gas film seal[J]. Aeroengine, 2001, 27(4): 20-25(in Chinese). https://www.cnki.com.cn/Article/CJFDTOTAL-HKFJ200104004.htm
[14]	王之栎, 刘国西, 郭艳丽. 反转轴间气膜密封动特性分析[J]. 北京航空航天大学学报, 2010, 36(5): 509-512. https://bhxb.buaa.edu.cn/CN/Y2010/V36/I5/509 WANG Z L, LIU G X, GUO Y L. Dynamic characteristic analysis of the gas film seal in counter-rotating shafts[J]. Journal of Beijing University of Aeronautics and Astronautics, 2010, 36(5): 509-512(in Chinese). https://bhxb.buaa.edu.cn/CN/Y2010/V36/I5/509
[15]	王之栎, 郭艳丽, 侯景仁. 反转轴间气膜密封的结构参数与密封性能分析[J]. 润滑与密封, 2008, 33(1): 68-72. https://www.cnki.com.cn/Article/CJFDTOTAL-RHMF200801017.htm WANG Z L, GUO Y L, HOU J R. Configuration parameters and sealing performances analysis of gas film seal in counter-rotating shafts[J]. Lubrication Engineering, 2008, 33(1): 68-72(in Chinese). https://www.cnki.com.cn/Article/CJFDTOTAL-RHMF200801017.htm
[16]	刘晓玉, 王之栎, 丁蕾, 等. 反转轴间双端面气膜密封性能分析[J]. 北京航空航天大学学报, 2017, 43(3): 608-614. doi: 10.13700/j.bh.1001-5965.2016.0216 LIU X Y, WANG Z L, DING L, et al. Seal performance analysis of double-faced gas film in counter-rotating intershafts[J]. Journal of Beijing University of Aeronautics and Astronautics, 2017, 43(3): 608-614(in Chinese). doi: 10.13700/j.bh.1001-5965.2016.0216
[17]	徐芝纶. 弹性力学(上册)[M]. 4版. 北京: 高等教育出版社, 2006. XU Z L. Elastic mechanics. Volume I[M]. 4th ed. Beijing: Higher Education Press, 2006(in Chinese).
[18]	曹宏瑞, 李兵, 陈雪峰, 等. 高速主轴离心膨胀及对轴承动态特性的影响[J]. 机械工程学报, 2012, 48(19): 59-64. https://www.cnki.com.cn/Article/CJFDTOTAL-JXXB201219009.htm CAO H R, LI B, CHEN X F, et al. Centrifugal expansion of high-speed spindle and its influences on bearing dynamic characteristics[J]. Journal of Mechanical Engineering, 2012, 48(19): 59-64(in Chinese). https://www.cnki.com.cn/Article/CJFDTOTAL-JXXB201219009.htm
[19]	张峻晖, 黄红武, 熊万里. 高速电主轴轴承配合过盈量的计算方法研究[J]. 机械与电子, 2004, 22(7): 7-10. https://www.cnki.com.cn/Article/CJFDTOTAL-JXYD200407002.htm ZHANG J H, HUANG H W, XIONG W L. Calculation method research of the interference fit for high speed motorized spindle bearings[J]. Machinery & Electronics, 2004, 22(7): 7-10(in Chinese). https://www.cnki.com.cn/Article/CJFDTOTAL-JXYD200407002.htm
[20]	濮良贵, 陈国定, 吴立言. 机械设计[M]. 9版. 北京: 高等教育出版社, 2013: 132-133. PU L G, CHEN G D, WU L Y. Mechanical design[M]. 9th ed. Beijing: Higher Education Press, 2013: 132-133(in Chinese).