Oberflächen-Topographie

FKM 2007
Booklet No. 297
Project No. 269

Final Report
Abstract:

Radial shaft seals are very frequently used sealing systems that can be found in a wide variety of applications. The parameters that influence the function of the sealing system are as varied as the areas of application and are the radial shaft seal made of elastomer and the fluid to be sealed. Due to the complexity, reliable predictions about the system behavior are possible. In the case of known combinations, it is possible to fall back on empirical values that are available from seal manufacturers and some users. However, if new combinations of sealing ring, shaft surface and lubricant are to be used, comprehensive test bench investigations are essential. The overall aim is therefore to describe the sealing system using a meaningful parameter S RWDR , which can be used to evaluate the sealing system. This parameter is made up of two components. The aim of the surface topography project is to investigate the characteristic value component that describes the system parameter influences on the sealing system. The parameter influences were determined using comprehensive test bench investigations. For the first time, it is now possible to directly calculate the delivery value of sealing systems with shaft surfaces ground in the groove for certain system parameters. For other lubricants and system diameters, the system equation is adapted using adjustment factors that can be determined by means of insertion tests. These findings can be used in a wide range of applications. For the first time, SMEs have the possibility to estimate the behavior of the sealing system. The knowledge gained extends the SRWDR characteristic value by a significant part, so that a further building block could be added to the overall objective of describing radial shaft seals using a characteristic and meaningful characteristic value. In a second part of the project, different speed-temperature collectives were investigated, which are used to test the function of sealing systems in endurance tests. The result is information on the design of such a collective and a collective proposal. The aim of the research project was achieved. Scope of report:
163 pages, 334 illustrations, 17 tables, 26 references Start of work:
01.07.2004 End of work:
31.12.2006 Funding body:
BMWi/AiF-Nr.13815 Research center:
Institute for Machine Elements (IMA), University of Stuttgart Head:
Prof. Dr.-Ing.B Bertsche Project leader:
Prof.Dr.-Ing.habil. W.Haas Editor and author:
Dipl.-Ing. S.Schmuker Chairman of the working group:
Dr.-Ing. D.Frey,ZF Friedrichshafen AG Chairman of the Board: Dipl.-Ing. W.Siepmann, Stahl-Armaturen PERSTA GmbH , Warstein