Multi-stage diffuse-type centrifugal pump

Details Multi-stage diffuse-type centrifugal pump Multi-stage diffuse-type centrifugal pump

1988-12-13

1990-03-20

Garrett, Robert E.

Rotary kinetic fluid motors or pumps

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

4152141, 4151991, 2771895, F04D 2908

Patent

active

049097059

ABSTRACT:
A multi-stage diffuser-type centrifugal pump suitable for feeding under pressure a low-temperature fluid such as a liquefied gas. Stages are respectively provided between adjacent ones of impellers provided in a plurality of stages. A cylindrical stage casing is provided in such a manner as to surround the stages, a sealant is provided between each stage and the stage casing to form a channel flow on an inner peripheral surface of the stage casing for flow from an upstream-side impeller to a downstream-side impeller. In addition, the sealant has a coefficient of thermal expansion which differs from the coefficient of thermal expansion of the stage and the stage casing.

REFERENCES:
patent: 2693760 (1954-11-01), Miller
patent: 3115840 (1963-12-01), Feltus
patent: 4128250 (1978-12-01), Barth
patent: 4483660 (1984-11-01), Roberts

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