Pump comprising a canned motor

Details Pump comprising a canned motor Pump comprising a canned motor

1987-05-11

1988-09-27

Garrett, Robert E.

Rotary kinetic fluid motors or pumps

Bearing, seal, or liner between runner portion and static part

415 26, 415 36, 415146, F04D 2916

Patent

active

047738227

ABSTRACT:
A pump with a canned motor (1) comprises a hollow shaft (4) open at the ends (5, 6) and provided with shaft ends (7, 8) and made of a relatively thin-walled tube. The portions (7, 8) of the shaft (4) are of a reduced diameter (d.sub.1, d.sub.2). A reciprocating ball (12) is situated in the cavity between a first shaft portion (8) and a second shaft portion (7), said first shaft portion forming a shaft end and provided with a spline (17). This ball abuts seats (13, 14) resulting from the reduction of the diameter of the shaft portions (7, 8), whereby the ball (12) and the seats (13, 14) form a valve. In this manner the valve of the hollow shaft (4) is provided in a particularly simple manner as the seats (13, 14) can be provided simultaneously with the manufacture of the shaft portions (7, 8) of a reduced diameter. The shaft portion (8) carrying the impeller (10) is provided with a spline which provides the hollow shaft (4) with the necessary torsional strength.

REFERENCES:
patent: 3076514 (1963-02-01), Garrison
patent: 3163116 (1964-12-01), McCourty et al.

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