Research Papers: Hydrodynamic Lubrication

Theoretical and Experimental Study on Dynamic Coefficients and Stability for a Hydrostatic/Hydrodynamic Conical Bearing

[+] Author and Article Information
Guo Hong1

School of Mechanical Engineering, Shanghai Jiao Tong University, Shanghai 200240, P. R. Chinagghhletter@zzu.edu.cn

Lai Xinmin

School of Mechanical Engineering, Shanghai Jiao Tong University, Shanghai 200240, P. R. China

Cen Shaoqi

School of Mechanical Engineering, Zhengzhou University, Zhengzhou 450001, P. R. China


Corresponding author.

J. Tribol 131(4), 041701 (Sep 21, 2009) (7 pages) doi:10.1115/1.3176991 History: Received November 20, 2008; Revised May 27, 2009; Published September 21, 2009

This paper presents a theoretical study and experimental method to recognize the dynamic performance (stiffness and damping coefficients) of an externally pressurized deep/shallow pockets hybrid conical bearing compensated by flat capillary restrictors. The equations governing the flow of fluid film in the conical bearing together with the pressure boundary condition and the restrictor flow equation are solved by using the finite element method. A delicate test rig is constructed and bearings having a big end diameter of 97 mm, a length of 90 mm, and a radial clearance of 0.02–0.025 mm are analyzed. It is assumed that the fluid film force of the hydrostatic/hydrodynamic conical bearing is characterized by a set of linear stiffness and damping coefficients. The experiment used the impulse excitation method to recognize these coefficients and established their characteristics under different operating conditions. Numerical results are compared with the experimental results. The stability parameters of hybrid conical, hydrodynamic, and hydrostatic bearings are compared. The results show that the hybrid conical bearing has the advantages of high load carrying capability and high stability under small eccentricity.

Copyright © 2009 by American Society of Mechanical Engineers
Your Session has timed out. Please sign back in to continue.



Grahic Jump Location
Figure 1

Conical bearing configurations

Grahic Jump Location
Figure 2

Boundary condition and restrictor flow equation

Grahic Jump Location
Figure 3

(a) Schematic of the test rig; (b) test rig

Grahic Jump Location
Figure 4

Outline of loading system and sensors locations

Grahic Jump Location
Figure 6

Dimensionless cross-coupled stiffness coefficients k¯xy, k¯xz, k¯yx, k¯yz, k¯zx, and k¯zy

Grahic Jump Location
Figure 7

Dimensionless direct damping coefficients b¯xx, b¯yy, and b¯zz

Grahic Jump Location
Figure 8

Dimensionless cross-coupled damping coefficients b¯xy, b¯xz, b¯yx, b¯yz, b¯zx, and b¯zy

Grahic Jump Location
Figure 5

Dimensionless direct stiffness coefficients k¯xx, k¯yy, and k¯zz




Some tools below are only available to our subscribers or users with an online account.

Related Content

Customize your page view by dragging and repositioning the boxes below.

Related Journal Articles
Related eBook Content
Topic Collections

Sorry! You do not have access to this content. For assistance or to subscribe, please contact us:

  • TELEPHONE: 1-800-843-2763 (Toll-free in the USA)
  • EMAIL: asmedigitalcollection@asme.org
Sign In