Créé le : 09/07/2015
Edwin-Scott D., Azibert H., Fribourg D. - 01/12/2014 - RC - Pump summit 2014 - Dusseldorf - Allemagne…
Compression Packings have tended to suffer from a conception of being an old fashioned technology not really suited to modern industrial processes and in the case of rotating equipment, largely superseded by mechanical seals. In particular it is widely believed that packings are inefficient in terms of energy consumption due to high frictional losses. Much of this perception is based on outdated products such as those based on asbestos and not modern types utilising sophisticated synthetic yarns such as ePTFE and aramids combined with complex lubricants.
This paper briefly describes the development of a straightforward test procedure for compression packings when used in rotary applications and its subsequent use to study the frictional characteristics of several packing types in comparison with various mechanical seals using a test rig specifically designed for the purpose. The paper will give brief details of the development of the test method followed by a description of the friction test equipment. It will then present initial results from the friction testing on a number of packing types and mechanical seals which may begin to challenge the widely held misconceptions concerning packing energy efficiency and cause a review of the theoretical methods currently used to calculate packing friction.
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Didier Fribourg
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