Rotary kinetic fluid motors or pumps – Working fluid passage or distributing means associated with... – Specific casing or vane material
Patent
1991-11-22
1993-01-26
Bertsch, Richard A.
Rotary kinetic fluid motors or pumps
Working fluid passage or distributing means associated with...
Specific casing or vane material
415206, 4152141, F04D 2944, F04D 2954, F01D 2524
Patent
active
051818280
ABSTRACT:
A molten metal pump includes an impeller disposed at the end of an elongate drive shaft. The drive shaft is disposed within an elongate, hollow post. The impeller and the end of the post are adapted to be immersed in molten metal. An inert gas is conveyed through the gap between the outer surface of the drive shaft and the inner surface of the post, which gas is discharged into the molten metal in the vicinity of the impeller. Because the drive shaft is insulated from the molten metal, it can be made of a durable material such as steel; because the post is stationary relative to the molten metal, the metal is stirred only by the impeller, and not by the drive shaft. The invention includes other features such as a quick disconnect capability and a radial adjustment capability.
REFERENCES:
patent: 3255702 (1968-06-01), Gehrm
patent: 3776660 (1973-12-01), Anderson et al.
patent: 3836280 (1974-09-01), Koch
patent: 4786230 (1988-11-01), Thut
patent: 4940384 (1990-07-01), Amra et al.
patent: 5088893 (1992-02-01), Gilbert et al.
Gilbert Ronald E.
Mordue George S.
Basichas Alfred
Bertsch Richard A.
Evans Larry W.
McCollister Scott A.
The Carborundum Company
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