0
Research Papers: Gas Turbines: Structures and Dynamics

Direct Outer Ring Cooling of a High Speed Jet Engine Mainshaft Ball Bearing: Experimental Investigation Results

[+] Author and Article Information
Peter Gloeckner

 FAG Aerospace GmbH & Co. KG, Georg Schaefer Str. 30, 97421 Schweinfurt, Germanypeter.gloeckner@schaeffler.com

Klaus Dullenkopf

Institut für Thermische Strömungsmaschinen, Karlsruhe Institute of Technology KIT, Kaiser Str. 12, 76131 Karlsruhe, Germanyklaus.dullenkopf@kit.edu

Michael Flouros

 MTU Aero Engines GmbH, Dachauer Str. 665, 80995 Munich, Germanymichael.flouros@mtu.de

J. Eng. Gas Turbines Power 133(6), 062503 (Feb 17, 2011) (7 pages) doi:10.1115/1.4002355 History: Received July 01, 2010; Revised July 02, 2010; Published February 17, 2011; Online February 17, 2011

Operating conditions in high speed mainshaft ball bearings applied in new aircraft propulsion systems require enhanced bearing designs and materials. Rotational speeds, loads, demands on higher thrust capability, and reliability have increased continuously over the last years. A consequence of these increasing operating conditions are increased bearing temperatures. A state of the art jet engine high speed ball bearing has been modified with an oil channel in the outer diameter of the bearing. This oil channel provides direct cooling of the outer ring. Rig testing under typical flight conditions has been performed to investigate the cooling efficiency of the outer ring oil channel. In this paper, the experimental results including bearing temperature distribution, power dissipation, and bearing oil pumping and the impact on oil mass and parasitic power loss reduction are presented.

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

References

Figures

Grahic Jump Location
Figure 1

Sketch of the high speed ball bearing with the outer ring cooling channel

Grahic Jump Location
Figure 2

Rig tested high speed ball bearing and bearing chamber with measured variables

Grahic Jump Location
Figure 3

Rig tested high speed ball bearing with bulk temperature instrumentation

Grahic Jump Location
Figure 4

Scoop efficiency for different nominal oil flows

Grahic Jump Location
Figure 5

Oil flow to the bearing left and right sides

Grahic Jump Location
Figure 6

Oil temperature on left and right sides of the bearing

Grahic Jump Location
Figure 7

Bulk temperature depending on bypass oil flow (Vnom=12 l/min)

Grahic Jump Location
Figure 8

Bulk temperature depending on bypass oil flow (Vnom=6 l/min)

Grahic Jump Location
Figure 9

Bulk temperature as function of bypass oil flow for oil inlet temperatures of 80°C and 110°C

Grahic Jump Location
Figure 10

Cooling effect on outer ring bulk temperature for a thrust range of 40–80 kN and different bypass oil flows

Grahic Jump Location
Figure 11

Bypass oil scavenge temperature

Grahic Jump Location
Figure 12

Outer ring channel heat to oil (transferred heat from the bearing to the outer ring channel oil)

Grahic Jump Location
Figure 13

Outer ring channel pumping power

Grahic Jump Location
Figure 14

Total bearing power loss (torque meter results)

Grahic Jump Location
Figure 15

Influence of bypass oil flow direction

Tables

Errata

Discussions

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