Numerical Analysis of General Groove Geometry for Dry Gas Seals

Abstract:

By Changing the key points on the spiral curve, general groove geometry was determined. Considering the simplicity of modeling and analysis, cubic spline function was used to express the general groove profile. By using the boundary fitted coordinate system transformation, irregular computational domain was transferred to regular region; Based on flow conservation principle, finite volume method was applied to discrete compressible Reynolds equation; By the application of Newton-Raphson iteration method for solving algebraic equation, numerical model of general groove dry gas seals was established. When compared sample results with shallow groove theory, the capacity and stiffness of numerical results match well with theoretical ones, verifying the accuracy of novel numerical model. Through analysis of three typical groove seals, spiral groove seal has strongest carrying capacity. Pressure distribution of three groove seals subjects to the law of hydrodynamic pressure effect. And the numerical model established in this paper will offer a general calculate platform for optimization of groove geometry in the future.

• Periodical: Applied Mechanics and Materials (Volumes 457-458)
• Pages: 544-551
• DOI: https://doi.org/10.4028/www.scientific.net/AMM.457-458.544
• Online since: October 2013
• Authors: Ji Bin Hu, Wen Jin Tao*, Yi Min Zhao, Chao Wei
• Keywords: Cubic Spline, Dry Gas Seals, Finite Volume Method (FVM), Flow Conservation Principle, General Groove Geometry

References

[1] Gabriel P R. Fundamentals of spiral groove non-contacting face seals[J]. Lubrication Engineering. 1994, 50(3): 215-224.

[2] Muijderman E A. Spiral groove bearings[M]. New York: Philips Technical Library: Springer-Verlag, (1966).

[3] Ikeuchi K, Mori H, Nishida T. A face seal with circumferential pumping grooves and Rayleigh-steps[J]. Journal of Tribology. 1988, 110(2): 313-319.

DOI: 10.1115/1.3261612

[4] Basu P. Analysis of a radial groove gas face seal[J]. Tribology Transactions. 1992, 35(1): 11-20.

DOI: 10.1080/10402009208982083

[5] Hu Ji-Bin，Liu Ding-Hua，Wei Chao. Numerical Simulation for Cavitation of Radial Grooved Face Seals[J]. Tribology. 2011, 31(06): 551-556.

[6] Zhou Jianfeng，Gu Boqin. Influence of micro perturbation on performance of liquid spiral groove mechanical seal[J]. Tribology. 2008, 28(04): 327-332.

[7] Xu Wanfu，Liu Yuchuan，Wang Zhili，et al. Reason of angular wobble self-excited vibration and half frequency characteristic for gas film face seal[J]. Chinese Journal of Mechanical Engineering. 2002, 38(09): 43-46.

DOI: 10.3901/jme.2002.09.043

[8] Xu Wanfu，Liu Yuchuan，Li Guangyu，et al. Theoretical analysis and experimental investigation of s piral groove dry running noncontacting gas seals[J]. Chinese Journal of Mechanical Engineering. 2003, 39(04): 124-127.

DOI: 10.3901/jme.2003.04.124

[9] Liu Yuchuan，Xu Wangfu，Wang Zhili，et al. Stability of angular wobble self-excited vibrations for gas film face seal[J]. Chinese Journal of Mechanical Engineering. 2002, 38(04): 1-6.

DOI: 10.3901/jme.2002.04.001

[10] Peng Xudong，Huang Li，Bai Shaoxian，et al. Numerical analysis of sealing performance of dry gas seal with goose-grooves[J]. CIESC Journal. 2010, 61(12): 3193-3199.

[11] Faria M T C. An Efficient Finite Element Procedure for Analysis of High-Speed Spiral Groove Gas Face Seals[J]. Journal of Tribology. 2001, 123(1): 205-210.

DOI: 10.1115/1.1331276

[12] Peng Xudong，Feng Xiangzhong，Hu Danmei，et al. Numerical analysis of deformation of a non-contacting gas lubricated seal[J]. Tribology. 2004, 24(06): 536-540.

[13] Kawabata N. A study on the numerical analysis of fluid film lubrication by the boundary-fitted coordinates system[J]. Transactions of the Japan Society of Mechanical Engineers, Series C. 1987, 53(494): 2155-2160.

DOI: 10.1299/kikaic.53.2155