Microgeometrical tooth profile modification influencing efficiency of planetary hub gears

Planetary hub systems offer desired speed and torque variation with a lighter, compact and coaxial construction than the traditional gear trains. Generated friction between the mating teeth flanks of vehicular planetary hubs under varying load-speed conditions is one of the main sources of power los...

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Main Authors:	Ehsan Fatourehchi, Mahdi Mohammadpour, Paul King, Homer Rahnejat, G. Trimmer, B. Womersley, A. Williams
Format:	Default Article
Published:	2018
Subjects:	Mechanical engineering not elsewhere classified Transmission efficiency Gear tooth modification Planetary wheel hub system Surface finish Mechanical Engineering not elsewhere classified
Online Access:	https://hdl.handle.net/2134/26007
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id	rr-article-9564566
record_format	Figshare
spelling	rr-article-95645662018-01-01T00:00:00Z Microgeometrical tooth profile modification influencing efficiency of planetary hub gears Ehsan Fatourehchi (1257477) Mahdi Mohammadpour (7204604) Paul King (1247412) Homer Rahnejat (1247550) G. Trimmer (7206458) B. Womersley (7206461) A. Williams (3713914) Mechanical engineering not elsewhere classified Transmission efficiency Gear tooth modification Planetary wheel hub system Surface finish Mechanical Engineering not elsewhere classified Planetary hub systems offer desired speed and torque variation with a lighter, compact and coaxial construction than the traditional gear trains. Generated friction between the mating teeth flanks of vehicular planetary hubs under varying load-speed conditions is one of the main sources of power loss. Modification of gear tooth geometry as well as controlling the contacting surface topography is the remedial action. The paper studies the effect of tooth crowning and tip relief upon system efficiency. It includes an analytical elastohydrodynamic analysis of elliptical point contact of crowned spur gear teeth. The analysis also includes the effect of direct contact of asperities on the opposing meshing surfaces. Tooth contact analysis (TCA) is used to obtain the contact footprint shape as well as contact kinematics and load distribution. A parametric study is carried out to observe the effect of gear teeth crowning and tip relief with different levels of surface finish upon the planetary hubs’ power loss. 2018-01-01T00:00:00Z Text Journal contribution 2134/26007 https://figshare.com/articles/journal_contribution/Microgeometrical_tooth_profile_modification_influencing_efficiency_of_planetary_hub_gears/9564566 CC BY-NC-ND 4.0
institution	Loughborough University
collection	Figshare
topic	Mechanical engineering not elsewhere classified Transmission efficiency Gear tooth modification Planetary wheel hub system Surface finish Mechanical Engineering not elsewhere classified
spellingShingle	Mechanical engineering not elsewhere classified Transmission efficiency Gear tooth modification Planetary wheel hub system Surface finish Mechanical Engineering not elsewhere classified Ehsan Fatourehchi Mahdi Mohammadpour Paul King Homer Rahnejat G. Trimmer B. Womersley A. Williams Microgeometrical tooth profile modification influencing efficiency of planetary hub gears
description	Planetary hub systems offer desired speed and torque variation with a lighter, compact and coaxial construction than the traditional gear trains. Generated friction between the mating teeth flanks of vehicular planetary hubs under varying load-speed conditions is one of the main sources of power loss. Modification of gear tooth geometry as well as controlling the contacting surface topography is the remedial action. The paper studies the effect of tooth crowning and tip relief upon system efficiency. It includes an analytical elastohydrodynamic analysis of elliptical point contact of crowned spur gear teeth. The analysis also includes the effect of direct contact of asperities on the opposing meshing surfaces. Tooth contact analysis (TCA) is used to obtain the contact footprint shape as well as contact kinematics and load distribution. A parametric study is carried out to observe the effect of gear teeth crowning and tip relief with different levels of surface finish upon the planetary hubs’ power loss.
format	Default Article
author	Ehsan Fatourehchi Mahdi Mohammadpour Paul King Homer Rahnejat G. Trimmer B. Womersley A. Williams
author_facet	Ehsan Fatourehchi Mahdi Mohammadpour Paul King Homer Rahnejat G. Trimmer B. Womersley A. Williams
author_sort	Ehsan Fatourehchi (1257477)
title	Microgeometrical tooth profile modification influencing efficiency of planetary hub gears
title_short	Microgeometrical tooth profile modification influencing efficiency of planetary hub gears
title_full	Microgeometrical tooth profile modification influencing efficiency of planetary hub gears
title_fullStr	Microgeometrical tooth profile modification influencing efficiency of planetary hub gears
title_full_unstemmed	Microgeometrical tooth profile modification influencing efficiency of planetary hub gears
title_sort	microgeometrical tooth profile modification influencing efficiency of planetary hub gears
publishDate	2018
url	https://hdl.handle.net/2134/26007
_version_	1797373452229804032

Microgeometrical tooth profile modification influencing efficiency of planetary hub gears

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