Technical Briefs

High-Pressure Angle Gears: Comparison to Typical Gear Designs

[+] Author and Article Information
Robert F. Handschuh

Andrew J. Zakrajsek

 NASA Glenn Research Center, Cleveland, OH 44135azakrajs@gmail.com

J. Mech. Des 133(11), 114501 (Nov 11, 2011) (6 pages) doi:10.1115/1.4004458 History: Received June 03, 2010; Revised April 06, 2011; Published November 11, 2011; Online November 11, 2011

A preliminary study has been completed to determine the feasibility of using high-pressure angle gears in aeronautic and space applications. Tests were conducted in the NASA GRC Spur Gear Test Facility at speeds up to 10,000 rpm and 73 N m (648 in. lb) for 3.18, 2.12, and 1.59 module gears (8, 12, and 16 diametral pitch gears), all designed to operate in the same test facility. The 3.18 module (8-diametral pitch), 28 tooth, 20 deg pressure angle gears are the NASA GRC baseline test specimen. Also, 2.12 module (12-diametral pitch), 42 tooth, 25 deg pressure angle gears were tested. Finally, 1.59 module (16-diametral pitch), 56 tooth, 35 deg pressure angle gears were tested. The high-pressure angle gears were the most efficient when operated in the high-speed aerospace mode (10,000 rpm, lubricated with a synthetic turbine engine oil) and produced the lowest wear rates when tested with a perfluoroether-based grease. The grease tests were conducted at 150 rpm and 71 N m (630 in. lb).

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



Grahic Jump Location
Figure 10

Grease retention shroud cad model

Grahic Jump Location
Figure 9

Left—20 deg pressure angle gear (3.18 module (8 Pitch)). Right—High-pressure angle gear 1.59 module (16 Pitch).

Grahic Jump Location
Figure 8

Top—shows rust forming on the gear profile. Bottom—shows rust debris from metal-on-metal contact. (Both photographs from a 2.12 module (12-diametral pitch) gear test)

Grahic Jump Location
Figure 7

Photograph of HPA gear flank end chip

Grahic Jump Location
Figure 6

Photograph of HPA gears after testing

Grahic Jump Location
Figure 5

Photograph of HPA gears before testing

Grahic Jump Location
Figure 4

Temperature results for three different gearing configurations. All tests conducted at 10,000 rpm, 71 N m (630 in. lb). Flow rate at 40 psi ∼ 8.1 ml/s (0.13 gpm).

Grahic Jump Location
Figure 3

Test facility at NASA Glenn Research Center

Grahic Jump Location
Figure 2

Left to right; 3.18, 2.12, and 1.59 module (8, 12, and 16 diametral pitch) test gears

Grahic Jump Location
Figure 1

Effect of gear design on sliding velocity at any point along the line of action between 3.18 and 1.59 module (8 and 16 diametral pitch) gears for a 1:1 ratio

Grahic Jump Location
Figure 11

Shrouds on the high-pressure angle gears during tests




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