Liner ring for a pump

Details Liner ring for a pump Liner ring for a pump

1991-12-20

1994-03-22

Look, Edward K.

Rotary kinetic fluid motors or pumps

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

Means to seal radial flow pump runner inlet from outlet

4151731, 4151733, 277183, 277184, 277189, 277DIG6, F04D 2916

Patent

active

052957861

ABSTRACT:
A liner ring for a pump is provided between a pump casing and an impeller to check counterflow therebetween. The liner ring comprises a housing provided on a casing body, an annular sealing member provided in the housing in such a manner that a predetermined gap is provided in a radial direction between the sealing member and an impeller, and an elastic member provided between the sealing member and the housing. In accordance with the present invention, the sealing member is housed in the housing made of sheet metal in such a manner that a predetermined gap is provided between the sliding member and the housing. The gap corresponds to the variation in dimensions due to the difference in thermal expansion coefficients of the sealing member and the housing. The gap is sealed by the elastic member provided between the sealing member and the housing.

REFERENCES:
patent: 3995868 (1976-12-01), Smith
patent: 4018544 (1977-04-01), Eberhard
patent: 4243233 (1981-01-01), Arai
patent: 4909707 (1990-03-01), Wauligman et al.
patent: 4948336 (1990-08-01), Mosure
patent: 5112190 (1992-05-01), Kajiwara et al.

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