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Title:
LIQUID-SEALED GAS PUMP
Document Type and Number:
Japanese Patent JPS63186984
Kind Code:
A
Abstract:

PURPOSE: To reduce the leakage of gas by setting the shape of an intake port provided on a port plate so that a gap between the port plate and the boss section of an impeller is made nearly uniform.

CONSTITUTION: An impeller 2 having a boss section 3 is arranged at an eccentric position in a casing 1, and a port plate 4 is fitted to an opening section. Notches 82 are formed on the inside end edge of the intake port of the port plate 4 at positions facing the boss section 3 so as to include the center axis of the port plate 4 and the center axis of the impeller 2, and a gap between the port plate 4 and the boss section 3 is made nearly uniform. Accordingly, the leakage of the high-pressure gas can be reduced, and the pump efficiency can be improved.


Inventors:
Ito, Eiichi
Yoshizaki, Masanori
Nakamura, Ryuichi
Kobayashi, Kazuo
Fujio, Masayuki
Application Number:
JP1987000015193
Publication Date:
August 02, 1988
Filing Date:
January 27, 1987
Export Citation:
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Assignee:
HITACHI LTD
International Classes:
F04C19/00; (IPC1-7): F04C19/00



 
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