Optimization of the tribological performance of rectangular seals in automotive transmissions

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Gronitzki, M.; Poll, G.W.G.: Optimization of the tribological performance of rectangular seals in automotive transmissions. In: Proceedings of the Institution of Mechanical Engineers, Part J: Journal of Engineering Tribology 221 (2007), Nr. 3, S. 259-270. DOI: https://doi.org/10.1243/13506501JET247

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Sum total of downloads: 301




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Abstract: 
Rectangular seals - a special type of face seals - are currently used in rotating connections of automatic automotive transmissions (double clutch transmissions, continuously variable transmissions, and 6-automated transmission) for the oil pressure supply of rotating control and actuator elements. Friction losses of several kilowatts can occur in the sealing system, causing a considerable reduction in efficiency. As a result of ongoing progress in power train design, sliding speeds and fluid pressures continue to increase. Therefore, due to friction related temperature rise in the sealing contact, extensive oil carbonization may occur. For both the reasons, developing friction optimized seals is crucial. For cost and design reasons grey cast iron rings are more and more substituted by modern, high temperature resistant thermoplastics. These materials also exhibit better friction and wear performance which can further be improved by adding polytetrafluorethylen or graphite. Because of their lower stiffness compared with metallic components, special thoughts have to be given to the design of thermoplastic rectangular seals. This paper describes how an improved geometry with optimized friction and wear performance was achieved by combining experimental investigations and numerical calculations on thermomechanical deflections. © IMechE 2007.
License of this version: Es gilt deutsches Urheberrecht. Das Dokument darf zum eigenen Gebrauch kostenfrei genutzt, aber nicht im Internet bereitgestellt oder an Außenstehende weitergegeben werden. Dieser Beitrag ist aufgrund einer (DFG-geförderten) Allianz- bzw. Nationallizenz frei zugänglich.
Document Type: article
Publishing status: publishedVersion
Issue Date: 2007
Appears in Collections:Fakultät für Maschinenbau

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pos. country downloads
total perc.
1 image of flag of Germany Germany 111 36.88%
2 image of flag of United States United States 38 12.62%
3 image of flag of India India 28 9.30%
4 image of flag of France France 19 6.31%
5 image of flag of Russian Federation Russian Federation 12 3.99%
6 image of flag of Czech Republic Czech Republic 11 3.65%
7 image of flag of China China 11 3.65%
8 image of flag of Netherlands Netherlands 7 2.33%
9 image of flag of United Kingdom United Kingdom 7 2.33%
10 image of flag of Canada Canada 5 1.66%
    other countries 52 17.28%

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