0
Research Papers

An Experimental Investigation of the Efficiency of Planetary Gear Sets

[+] Author and Article Information
David C. Talbot

Department of Mechanical and Aerospace Engineering,  The Ohio State University, 201 W 19th Avenue, Columbus, OH 43210talbot.11@osu.edu

Ahmet Kahraman

Department of Mechanical and Aerospace Engineering,  The Ohio State University, 201 W 19th Avenue, Columbus, OH 43210kahraman.1@osu.edu

Avinash Singh

General Motors Powertrain,895 Joslyn Avenue, Building C,Pontiac, MI 48390avinash.singh@gm.com

J. Mech. Des 134(2), 021003 (Feb 03, 2012) (7 pages) doi:10.1115/1.4005599 History: Received June 14, 2011; Revised November 01, 2011; Published February 03, 2012

In this paper, results from an experimental study on power losses of planetary gear sets are presented. The experimental setup includes a specialized test apparatus to operate a planetary gear set under tightly controlled speed, load and oil temperature conditions, and instrumentation for an accurate measurement of power losses. The test matrix consisted of gear sets having three–six planets under loaded and unloaded conditions in order to separate load independent (spin) and load dependent (mechanical) power losses. The test matrix also included tests with planet gears having two levels of tooth surface roughness amplitudes as well as tests at varying oil inlet temperature. The results clearly indicate that spin power loss decreases with both reduction of number of planets and increase in oil temperature. Meanwhile, the mechanical power loss decreases with a decrease in oil temperature and reduction in gear surface roughnesses. Results also indicate that mechanical losses can be described by the power transmitted and lost by each planet branch.

FIGURES IN THIS ARTICLE
<>
Copyright © 2012 by American Society of Mechanical Engineers
Your Session has timed out. Please sign back in to continue.

References

Figures

Grahic Jump Location
Figure 1

Cross-sectional view of the test gearbox

Grahic Jump Location
Figure 2

A view of the test setup and instrumentation

Grahic Jump Location
Figure 3

Four-, five-, and six-planet test carriers

Grahic Jump Location
Figure 4

Measured (a) total power loss, (b) mechanical power loss, (c) total efficiency, and (d) mechanical efficiency of a three-planet shaved gear set at 90 °C

Grahic Jump Location
Figure 5

Measured (a) total power loss and (b) mechanical power loss of a four-planet shaved gear set at 90 °C

Grahic Jump Location
Figure 6

Measured (a) total power loss and (b) mechanical power loss of a five-planet shaved gear set at 90 °C

Grahic Jump Location
Figure 7

Measured (a) total power loss and (b) mechanical power loss of a six-planet shaved gear set at 90 °C

Grahic Jump Location
Figure 8

Comparison of power losses of three- to six-planet shaved gear sets at (a) 0 Nm, (b) 500 Nm, (c) 1000 Nm at 90 °C

Grahic Jump Location
Figure 9

Branch power loss as a function of branch torque and sun speed at 90 °C, three- to six-planet shaved gear sets

Grahic Jump Location
Figure 10

Measured (a) total power loss and (b) mechanical power loss of a six-planet gear set with chemically polished planets at 90 °C

Grahic Jump Location
Figure 11

The difference betweeen the mechanical power loss values for shaved and polished planets at 90 °C

Grahic Jump Location
Figure 12

Comparison of the (a) mechanical power losses at 1000 Nm and (b) spin power losses of the three-planet shaved gear set at 40 and 90 °C

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