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Title:
IMMERSION PUMP ASSEMBLY
Document Type and Number:
Japanese Patent JPH0275794
Kind Code:
A
Abstract:

PURPOSE: To efficiently disperse heat from a waste heat source all the time by forming a hollow and closable shaft, partially filling liquid in the hollow shaft and forming a heat pipe system.

CONSTITUTION: A shaft 7 is formed as a hollow and closable shaft by a closure member 18, and a liquid 17 is partially filled into the hollow shaft. Before a pump device is put into work, the closure member 18 is taken off and the liquid 17 is filled into the hollow shaft 7. After that, while removing the remainder air from the hollow shaft, the hollow part inside the shaft is air sealed and liquid sealed by the closure member 18. Therefore, the shaft thus produced, with the liquid 17 in the hollow part together, forms a heat pipe system for dispersal of loss heat from a rotor chamber 13 of the motor 2.


Inventors:
Jensen, Niels D.
Christensen, Joergen
Application Number:
JP1989000214273
Publication Date:
March 15, 1990
Filing Date:
August 22, 1989
Export Citation:
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Assignee:
GRUNDFOS INTERNATL AS
International Classes:
F04D13/08; F04D13/10; F04D29/04; F04D29/043; F04D29/58; (IPC1-7): F04D13/08



 
Next Patent: CENTRIFUGAL PUMP