Rotary kinetic fluid motors or pumps – Runner or blade selectively adjustable relative to casing – Axially adjusted
Patent
1977-08-10
1978-12-19
Husar, C. J.
Rotary kinetic fluid motors or pumps
Runner or blade selectively adjustable relative to casing
Axially adjusted
415140, 417423R, F01D 700
Patent
active
041303741
ABSTRACT:
The present invention relates to a centrifugal pump assembly in which an impeller is mounted to a motor shaft without the need for precision machining of the shaft and in which the proper spacing is automatically achieved between the impeller and the pump housing. An end of the motor shaft projects toward an impeller chamber in which a rotary impeller is situated. The impeller hub has a bore therein through which a threaded fastening means passes. The threaded fastening means mates with a threaded well in the end of a motor shaft. However, a coil spring which surrounds the fastening means abuts the shaft end and also abuts the impeller hub. The spring biases the impeller away from the wall of the pump housing and toward the interior of the impeller chamber. The spring prevents the impeller from abutting against the housing wall and the bias of the spring may be adjusted to compensate for variations in the shaft length. Further, the head of the fastening means resides within a recess in the impeller hub, the depth of which is equal to the predetermined spacing required between the impeller and the impeller housing.
REFERENCES:
patent: 1012265 (1911-12-01), Miller
patent: 1404717 (1922-01-01), Humphrey
patent: 1689726 (1928-10-01), Jennings
patent: 2010525 (1935-08-01), McHugh
patent: 2233268 (1941-02-01), McHugh
patent: 2438442 (1948-03-01), Holt
patent: 2625883 (1953-01-01), Howser
patent: 3117526 (1964-01-01), Zimmermann
patent: 3407740 (1968-10-01), Samerdyke
patent: 3711218 (1973-01-01), Kennel et al.
patent: 3771927 (1973-11-01), Schiller
Husar C. J.
Milton Roy Company
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