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Cooling means for radial bearings in nuclear reactor pumps or the like

Patent ·
OSTI ID:4094968
; ;
A description is given of a pump for circulation of fluid in the interior of a nuclear reactor vessel which has a tubular member which extends upwardly into the vessel and with clearance through an opening in the bottom wall of the vessel. A sleeve-like bearing element has a lower portion received with minimal clearance in the tubular member and an upper portion which defines with the tubular member a first annular clearance having an enlarged ring-shaped upper portion for an auxiliary impeller which is driven by a pump shaft extending with clearance through the tubular member and having a second impeller in the interior of the vessel. The upper portion of the bearing element fixedly receives a bearing sleeve which defines with a cylindrical shield a second annular clearance communicating with a chamber for liquid coolant. The chamber is defined by a first mounting member which is received with clearance in the tubular member and supports the bearing element and a second mounting member which supports the shield and defines with the shaft a third annular clearance adapted to receive coolant through one or more channels in the lower portion of the second mounting member. When the chamber fails to receive a fresh coolant, the auxiliary impeller draws coolant from the lower part of the chamber, through the channel or channels of the second mounting member, through the third clearance, through one or more ports in the shield, through the second clearance, and into the upper portion of the first clearance. (Official Gazette)
Research Organization:
Originating Research Org. not identified
NSA Number:
NSA-33-019599
Assignee:
to Sulzer KSB Kernkraftwerkspumpen GmbH
Patent Number(s):
US 3918689
OSTI ID:
4094968
Country of Publication:
United States
Language:
English

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Related Subjects

*PRIMARY COOLANT CIRCUITS-- PUMPS
*PUMPS-- BEARINGS
220200* --Nuclear Reactor Technology--Components & Accessories
COOLING
DESIGN
N79200* --Reactors--Reactor Components & Accessories