F - Mech Eng,Light,Heat,Weapons – 04 – D
Patent
F - Mech Eng,Light,Heat,Weapons
04
D
F04D 29/08 (2006.01) F04B 53/00 (2006.01) F04C 15/00 (2006.01) F04C 27/00 (2006.01)
Patent
CA 2262849
The invention relates to a fluid-conveying machine, in particular, a pump having a component rotating in a stationary housing part inside an annular gap. The stationary housing part separates an interior having a higher product pressure from an exterior having a lower pressure. A rotating component is mounted in an external bearing which is sealed with respect to the interior via a sealing system. In order to improve the sealing, the invention provides that the annular gap is formed between two sliding bearing shells which comprise extremely hard, wear-resistant materials and, in accordance with the operating principle of a radial sliding bearing, form a first pressure-reducing stage. A feedback device, which feeds back the leakage from this first sealing stage into the conveying process of the machine, is connected downstream of the first pressure-reducing stage. A second sealing stage is arranged axially downstream of the feedback device. The second sealing stage may be constructed as a simple seal, such as a lip seal and/or a simple end face seal.
Brandt Jens-Uwe
Hristov Vejen
Rohlfing Gerhard
Joh. Heinr. Bornemann Gmbh
Kirby Eades Gale Baker
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