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AKIŞKAN FİLM ŞAFT YATAKLARININ DİNAMİK KATSAYILARININ HESAPLANMASI

CALCULATION OF DYNAMIC COEFFICIENTS FOR FLUID FILM JOURNAL BEARINGS

Journal Name:

  • Pamukkale Üniversitesi Mühendislik Bilimleri Dergisi

Publication Year:

  • 2005

Key Words:

Keywords (Original Language):

Author NameUniversity of AuthorFaculty of Author
Abstract (2. Language): 
An analytical method for calculating the stiffness and damping coefficients for journal bearings is briefly reviewed with author's contributions. These coefficients are required for stability calculations of rotor-bearing systems. The Reynolds equation governing the pressure field within a bearing is obtained by simplifying the Navier-Stokes equations in Cartesian coordinates. It is then solved analytically using the short bearing approximation to obtain pressures in the fluid film. Integration of the pressure obtained by the solution of the Reynolds equation defines the bearing forces and the corresponding dynamic stiffness and damping coefficients of short circular bearings. The results presented in this work can be used in the stability calculations of rotor systems with short circular bearings.
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Abstract (Original Language): 
Şaft yataklarının rijidlik ve sönüm katsayılarını hesaplamak için analitik bir metot yazarın katkılarıyla birlikte kısaca derleniyor. Bu katsayılar rotor-rulman sistemlerinin kararlılık hesaplamaları için gereklidir. Bir rulman içindeki basıncı veren Reynolds denklemi kartezyen koordinatlarda Navier-Stokes denklemlerinin sadeleştirilmesiyle elde ediliyor. Daha sonra bu denklem akışkan filmdeki basınçları elde etmek için kısa rulman yaklaşımını kullanarak analitik olarak çözülüyor. Reynolds denkleminin çözümünden elde edilen basıncın integrasyonu rulman kuvvetlerini ve bunlara karşılık gelen kısa çembersel rulmanların dinamik rijidlik ve sönüm katsayılarını tanımlar. Bu çalışmada sunulan sonuçlar kısa çembersel rulmanlara sahip rotor sistemlerinin kararlılık hesaplamalarında kullanılabilir.
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  • Turkish

REFERENCES

References: 

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Goodwin, M. J. 1989. Dynamics of Rotor-Bearing Systems, Unwin Hyman.
Hamrock, B. J. 1994. Fundamentals of Fluid Film Lubrication, The Ohio State University, Columbus, Ohio, McGraw-Hill, Inc.
Kirk, R. G., and Gunter, E. J. 1976. Short Bearing Analysis Applied to Rotor Dynamics Part I: Theory, ASME Journal of Lubrication Technology, January,
47-56.
Kramer, E. 1993. Dynamics of Rotors and Foundations, Springer-Verlag, Berlin, Heidelberg.
Rao, J. S. 1983. Rotor Dynamics, John Wiley and Sons.
Szeri, A. Z. 1980. Tribology, Friction, Lubrication, and Wear, University of Pittsburg, Hemishphere Publishing Corporation.
Szeri, A. Z. 1987. Some Extensions of the Lubrication Theory of Osborne Reynolds, ASME Journal of Tribology, 109, 21-36.
Yucel, U. 2000. Effects of Labyrinth Seals on the Stability of Rotors, PhD Dissertation, Lehigh University, Bethlehem, PA, USA.
Yücel,
U
. 2003. Stability of Rotor-Bearing Systems, Pamukkale University, Engineering College, Journal of Engineering Sciences, 9 (3), 387-392.

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