Centrifugal pump

Details Centrifugal pump Centrifugal pump

1995-05-31

1999-02-16

Kwon, John T.

Rotary kinetic fluid motors or pumps

Bearing, seal, or liner between runner portion and static part

415110, F04D 2908

Patent

active

058713328

ABSTRACT:
A centrifugal pump has a rotating shaft (1) with a centrifugal impeller (3) mounted on it. The shaft (1) and impeller (3) are mounted within a stationary casing (7) and a mechanical seal (8) is provided where the shaft (1) passes out through the casing (7). In order to cool rubbing, sealing faces (9, 11) of the seal, fluid is caused to flow along a path from a tip (6) of the impeller, through the casing (7), into a seal chamber (14), through a clearance (15) between a hub (2) of the impeller and the casing (7) and returning through a port (16) in the impeller. In order to act as a vent for and to clear debris from the seal chamber (14), the clearance is located radially outwardly of and remote from the shaft (1). Especially those parts which are moving and are subject to wear can be replaceable.

REFERENCES:
patent: 3850550 (1974-11-01), Kaessen
patent: 4812108 (1989-03-01), Kotera
patent: 4979875 (1990-12-01), Muller et al.
patent: 4997340 (1991-03-01), Zinsmeyer et al.
patent: 5106262 (1992-04-01), Oklejas et al.
patent: 5131806 (1992-07-01), Taga
patent: 5171126 (1992-12-01), Becker et al.
patent: 5248245 (1993-09-01), Behnke et al.
patent: 5297928 (1994-03-01), Imakiire et al.
patent: 5310265 (1994-05-01), Stangeland et al.

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