Wear Consideration in Gear Design for Space Applications
Abstract
A procedure is described that was developed for evaluating the wear in a set of gears in mesh under high load and low rotational speed. The method can be used for only low-speed gear application, with nearly negligible oil film thickness, and is especially useful in space stepping mechanism applications where determination of pointing error due to wear is important, such as in long life sensor antenna drives. A method is developed for total wear depth at the ends of the line of action using a very simple formula with the slide to roll ratio Vs/Vr. A method is also developed that uses the wear results to calculate the transmission error also known as pointing error of a gear mesh. Gears used in space applications are usually thought of as instrument gears with negligible load that must maintain position accuracy throughout their operational life or as deployment/actuator gears that may have inertial loads but a very low number of duty cycles.
Document Details
- Document Type
- Technical Report
- Publication Date
- Jan 01, 1989
- Accession Number
- ADA205575
Entities
People
- Dennis P. Townsend
- Lee S. Akin
Organizations
- National Aeronautics and Space Administration