Rotary kinetic fluid motors or pumps – With inspection – signaling – indicating or measuring means
Patent
1989-06-12
1990-09-11
Garrett, Robert E.
Rotary kinetic fluid motors or pumps
With inspection, signaling, indicating or measuring means
416 63, B01D 2500
Patent
active
049557874
ABSTRACT:
A reactor coolant pump has an outer casing with an internal cavity holding a coolant and a rotor rotatably mounted in the cavity within the coolant. An assembly for permitting inservice inspection of the pump rotor without first draining the coolant from the casing cavity is attached to an end of the pump. A cylindrical bore is defined through the casing in axial alignment with an end of pump rotor and opening into the internal cavity. An extension attached on the rotor end and rotatable therewith has a cylindrical coupler member extending into the bore. An outer end of the coupler member has an element configured to receive a tool for performance of inservice rotor inspection. A hollow cylindrical member is disposed in the bore and surrounds the coupler member. The cylindrical member is slidably movable relative to the coupler member along the bore between a retracted position wherein the cylindrical member is stored for normal pump operation and an extended position wherein the cylindrical member is extended for permitting inservice rotor inspection. A cover member is detachably and sealably attached to the casing across the bore for closing the bore and retaining the cylindrical member at its retracted position for normal pump operation. Upon detachment of the cover member, the cylindrical member can be extended to permit inservice rotor inspection.
REFERENCES:
patent: 2972310 (1961-02-01), Akermann
patent: 3491695 (1970-01-01), Blum
patent: 3936217 (1976-02-01), Travaglini et al.
patent: 3989408 (1976-11-01), Jaegtnes
patent: 4087204 (1978-05-01), Niedermeyer
patent: 4406580 (1983-09-01), Baran, Jr.
patent: 4591477 (1986-05-01), Rettew
Garrett Robert E.
Nguyen Hoang
Spadacene J. C.
Westinghouse Electric Corp.
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