Technical Briefs

Lubricated Hybrid Journal Bearings

[+] Author and Article Information
Roberto Bassani

Department of Mechanical, Nuclear and Production Engineering,  University of Pisa, Via Diotisalvi 2, Pisa 56122, Italy

J. Tribol 133(3), 034501 (Jun 17, 2011) (5 pages) doi:10.1115/1.4002875 History: Received February 16, 2010; Revised October 15, 2010; Published June 17, 2011; Online June 17, 2011

This chapter deals with a hydrodynamic journal bearing provided with hollow bushings, capable of supporting very high loads, even at low speeds, at which separation between the shaft and the housing’s bushing is induced by a specific self-regulating hydrostatic system. The same amount of lubricant can be used for both hydrostatic and hydrodynamic lubrication, thereby facilitating transition between the two. This hybrid bearing can be used in several applications.

Copyright © 2011 by American Society of Mechanical Engineers
Your Session has timed out. Please sign back in to continue.



Grahic Jump Location
Figure 1

Journal bearing: schematic outline

Grahic Jump Location
Figure 2

Journal bearing: (a1 ) minimum film thickness and eccentricity, (a2 ) lubricant flow rate, and (a3 ) coefficient of friction versus the Sommerfeld number, for some values of the length ratio

Grahic Jump Location
Figure 3

Journal bearings with hydrostatic lift recesses: (a1 ) and (a2 ) schematic outlines, (b) load-carrying capacity, (c) pressure in the recess versus eccentricity, for some types of recess

Grahic Jump Location
Figure 4

Compact hydrodynamic journal bearing with hollow bushings: schematic outline

Grahic Jump Location
Figure 5

Double direction hydrostatic thrust bearings: (a) Self-regulating bearing (b) Load-carrying capacity versus eccentricity ratio

Grahic Jump Location
Figure 6

Compact hydrodynamic journal bearing with self-regulating hydrostatic lift

Grahic Jump Location
Figure 7

Self-regulating hydrostatic lift: (a) comparison between circular and rectangular pads and (b) radius ratios of the circular pad versus threshold length of the rectangular pad




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