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An Experimental Methodology for Evaluating Power Losses of Rolling Element Bearings Subjected to Combined Radial and Axial Loads

Vedera, Kevin G
http://rave.ohiolink.edu/etdc/view?acc_num=osu1522933829712819

Abstract Details

2018, Master of Science, Ohio State University, Mechanical Engineering.
Environmental regulations of air quality combined with a push by customers for better vehicle fuel economy has been forcing automotive manufacturers to improve powertrain efficiency. Power losses of load carrying gear and bearing components of automotive transmissions have become a major research area in recent years. Measurement of power loss of a gearbox is a routine task where losses from rolling element bearings and gear meshes collectively define the total loss. However, separating bearing and gear mesh losses is not possible, as a gear mesh cannot be operated without it support bearings. This study aims at developing a new methodology for measuring power losses of rolling element bearings of different types operated under realistic loading, speed and temperature conditions. A unique test machine concept is implemented to apply radial and axial loads to a pair of test bearings in a stable and repeatable manner, with lubrication parameters, speed, and force application tightly controlled during testing. The proposed test methodology is employed to evaluate power loss for three different types of bearings. Load-dependent (mechanical) and load-independent (spin) components of power loss are separated, and influence of speed and load components on mechanical losses are quantified. A repeatability study of the machine and methodology is also presented to assess the accuracy of the proposed methodology.
Ahmet Kahraman (Advisor)
Carlos Castro (Committee Member)
109 p.
Mechanical Engineering
Rolling element bearings; Power loss; Power transmission systems

Recommended Citations

Citations

  • Vedera, K. G. (2018). An Experimental Methodology for Evaluating Power Losses of Rolling Element Bearings Subjected to Combined Radial and Axial Loads [Master's thesis, Ohio State University]. OhioLINK Electronic Theses and Dissertations Center. http://rave.ohiolink.edu/etdc/view?acc_num=osu1522933829712819

    APA Style (7th edition)

  • Vedera, Kevin. An Experimental Methodology for Evaluating Power Losses of Rolling Element Bearings Subjected to Combined Radial and Axial Loads. 2018. Ohio State University, Master's thesis. OhioLINK Electronic Theses and Dissertations Center, http://rave.ohiolink.edu/etdc/view?acc_num=osu1522933829712819.

    MLA Style (8th edition)

  • Vedera, Kevin. "An Experimental Methodology for Evaluating Power Losses of Rolling Element Bearings Subjected to Combined Radial and Axial Loads." Master's thesis, Ohio State University, 2018. http://rave.ohiolink.edu/etdc/view?acc_num=osu1522933829712819

    Chicago Manual of Style (17th edition)

osu1522933829712819
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© 2018, all rights reserved.
This open access ETD is published by The Ohio State University and OhioLINK.