Performance Analysis of the Flotation Cushion with Elastic Pressure Equalizing Groove for Aerostatic Slideway

Abstract:

In order to improve stiffness of the flotation cushion, a new type of flotation cushion with variable-section pressure equalizing groove of elastic plate for aerostatic slideway was designed. Gas film pressure distribution and load carrying capacity of this flotation cushion was studied through theoretical analysis. The grid was generated by taking advantage of overlapping stitching technique. By using the coupling calculation of the gas lubrication governing equation and elastic deformation of thin plate governing equation, the load carrying capacity and stiffness of the new flotation cushion were obtained. Some experiments were made to verify the result of theoretical calculation. The experimental results show that the stiffness of new flotation cushion is much higher than conventional flotation cushion.This new flotation cushion has a wider application space.

• Periodical: Applied Mechanics and Materials (Volumes 152-154)
• Pages: 743-748
• DOI: https://doi.org/10.4028/www.scientific.net/AMM.152-154.743
• Online since: January 2012
• Authors: Jun An Zhang, Hao Dong, Fang Jie Ma, Bo Liu
• Keywords: Flotation Cushion, Stiffness, Variable-Section Pressure Equalizing Groove

References

[1] Zhang J A, Yuan L, Fang Z. A New Type of Aerostatic Thrust Bearing with High Stiffness. International Technology and Innovation Conference 2006(Advanced Manufacturing Technologies). Hangzhou: IET, 1996, 1367-1375.

DOI: 10.1049/cp:20061029

[2] ZHANG Jun-an, ZHANG Wen-hao, LIAO Bo, LIU Bo. A Study on characteristics of static pressure thrust bearing with variable-section pressure equalizing groove. Tribology. Vol. 29 No. 4 July, 2009. 329-334.

DOI: 10.1049/cp.2009.1396

[3] Henshaw W D. Domain decomposion methods for the incompressible Navier-Stokes equations on overlapping grids. Comput Phys, 1994. 113: 13-25.

DOI: 10.1006/jcph.1994.1114

[4] Fourka M, Tian Y, Bonis M. Prediction of the stability of air thrust bearing by numerical, analytical and experimental methods. Wear 1996; 198: 1–6.

DOI: 10.1016/0043-1648(95)06782-5

[5] Karkoub M, Elkamel A. Modelling, pressure distribution in a rectangular gas bearing using neural networks. Tribol Int 1997; 30(2): 139–50.

DOI: 10.1016/0301-679x(96)00038-2

[6] Kassab SZ. Empirical correlations for the pressure depression in externally pressurized gas bearings. Tribol Int 1997; 30(1): 59–67.

DOI: 10.1016/0301-679x(96)00023-0

[7] Fourka M, Bonis M. Comparison between externally pressurized gas thrust bearing with different orifice and porous feeding systems. Wear 1997; 210: 311–7.

DOI: 10.1016/s0043-1648(97)00079-3

[8] Kotera H, Shima S. Tribol trans: shape optimization to perform prescribed air lubrication using GA. Tribol Trans 2000; 43(4): 837–41.

DOI: 10.1080/10402000008982416

[9] Kotera H, Hirasawa T, Senga S, Shimam S. A study on the effect of air on the dynamic motion of MEMS device and its shape optimization. Tribol Trans 2000; 43(4): 842–6.

DOI: 10.1080/10402000008982417

[10] Wang N, Chang Y-Z. A hybrid search algorithm for porous air bearing optimisation. Tribol Trans 2002; 45(4): 471–7.

[11] Kato T, Soutome H. Friction material design for brake pads using database. Tribol Trans 2001; 44: 137–41.

DOI: 10.1080/10402000108982437

[12] Wang N, Chang Y-Z. Application of genetic algorithms to multiobjective optimization of air bearings. Tribol Lett 2004; 17(2): 119–25.

[13] Bhat N, Barrans SM. Optimization of journal bearings with the aid of finite element analysis. In: Proceedings of the NAFEMS world congress, 2003. Glasgow: NAFEMS; (2003).

[14] Barrans SM, Bhat N, Optimisation of flat pad air bearings with the aid of finite element analysis. In: Proceedings of the seventh international lamdamap conference, 2005. Bedford: Euspen; 2005. p.392–401.

[15] Mori H, Miyamatsu Y. Theoretical flow-models for externally pressurized gas bearings. J Lubric Technol 1969; 91(1): 181–93.

DOI: 10.1115/1.3554854

[16] Belforte G, Raparelli T, Viktorov V, Trivella A. Discharge coefficients of simple orifices with feed pocket for aerostatic bearings. In: Proceedings of the fourth AIMETA international tribology conference, 14–17 September 2004, Rome, Italy. Aracne Editor. p.467.

DOI: 10.1016/j.triboint.2006.05.003

[17] Kassab SZ, Noureldeen EM, Shawky A. Effects of operating conditions and supply hole diameter on the performance of a rectangular aerostatic bearing. Tribol Int 1997; 30(7): 533–45.

DOI: 10.1016/s0301-679x(97)00001-7