%0 Conference Paper %1 Bauer.2005b %A Bauer, Frank %A Haas, Werner %B Proceedings of the 18th International Conference on Fluid Sealing %C Cranfield %D 2005 %E Hoyes, John %I BHR Group %K W_Haas from:thomasherzig dichtungstechnik F_Bauer from:brunomueller from:samuelschwamm ima %T PTFE lip seals with spiral groove – The penetration behaviour, hydrodynamic flow and back pumping mechanisms %X The development of seals is often based on empiric knowledge. Especially the hydrodynamic flow and the “back pumping mechanisms” in sealing aids of elastomeric lip seals and in the spiral grooves of PTFE lip seals are not well understood up to now. Nevertheless, this understanding of the flow is indispensable to be able to develop and improve new seals. For this purpose, it is necessary to be able to visualise and analyse the hydrodynamic flow in and beneath the sealing aids. A method was developed and a test rig was built at the Institute of Machine Components at the University of Stuttgart to visualise the flow. The flow under the sealing interface can be observed and recorded through a glass hollow shaft and a prism by a zoom lens and a digital camera. This knowledge helps to analyse and understand the mechanisms. Furthermore, it is the base for optimisations of the geometry of the sealing aids and for fluid mechanic simulations, which can avoid expensive prototypes. %@ 1-85598-070-3

@inproceedings{Bauer.2005b, abstract = {The development of seals is often based on empiric knowledge. Especially the hydrodynamic flow and the “back pumping mechanisms” in sealing aids of elastomeric lip seals and in the spiral grooves of PTFE lip seals are not well understood up to now. Nevertheless, this understanding of the flow is indispensable to be able to develop and improve new seals. For this purpose, it is necessary to be able to visualise and analyse the hydrodynamic flow in and beneath the sealing aids. A method was developed and a test rig was built at the Institute of Machine Components at the University of Stuttgart to visualise the flow. The flow under the sealing interface can be observed and recorded through a glass hollow shaft and a prism by a zoom lens and a digital camera. This knowledge helps to analyse and understand the mechanisms. Furthermore, it is the base for optimisations of the geometry of the sealing aids and for fluid mechanic simulations, which can avoid expensive prototypes.}, added-at = {2021-03-25T17:56:09.000+0100}, address = {Cranfield}, author = {Bauer, Frank and Haas, Werner}, biburl = {https://puma.ub.uni-stuttgart.de/bibtex/2ad28d46a35ae2f7ac9c48576da8ed83a/ima-publ}, booktitle = {Proceedings of the 18th International Conference on Fluid Sealing}, editor = {Hoyes, John}, eventdate = {2005-10-12/2005-10-14}, eventtitle = {18th Int. Conference on Fluid Sealing}, interhash = {5437a8571550a5ab1ca02b50515e66e3}, intrahash = {ad28d46a35ae2f7ac9c48576da8ed83a}, isbn = {1-85598-070-3}, keywords = {W_Haas from:thomasherzig dichtungstechnik F_Bauer from:brunomueller from:samuelschwamm ima}, note = 281, publisher = {BHR Group}, series = {Transferring technology}, timestamp = {2021-03-25T16:56:09.000+0100}, title = {PTFE lip seals with spiral groove – The penetration behaviour, hydrodynamic flow and back pumping mechanisms}, venue = {Antwerp, Belgium}, year = 2005 }