Hermatically sealed motor blower unit with stator inside hollow

Details Hermatically sealed motor blower unit with stator inside hollow Hermatically sealed motor blower unit with stator inside hollow

1945-05-01

1976-01-20

Ruehl, Charles A.

Pumps

Motor driven

Motor within rotary pumping member

310 67R, 310 54, 310 90, 415111, 415112, 417372, 417424, 417902, F04B 3504

Patent

active

039334163

ABSTRACT:
13. A hermetically sealed motor blower unit comprising, in combination, a sealed housing having a thrust plate mounted therein and having a re-entrant wall forming a central cavity in said housing, a rotor within said housing, said rotor comprising an impeller, a hollow shaft embracing said cavity and a thrust collar adapted to cooperate with said thrust plate to support the axial thrust of said shaft, one or more journal bearings within said housing for supporting the radial load of said shaft and electric motor means for rotating said rotor, said motor means comprising a motor-stator located within said cavity and adapted to cooperate through a portion of said re-entrant wall with a motor-rotor mounted within said hollow shaft, the portion of said re-entrant wall located between said motor-stator and said motor-rotor being made relatively thin to reduce electrical losses, the bearing surfaces of said thrust plate, thrust collar and journal bearings being in communication with the discharge of said impeller, whereby fluid pumped by said impeller can flow directly to said bearing surfaces to lubricate them.

REFERENCES:
patent: 1539195 (1925-05-01), Kremser
patent: 1632357 (1927-06-01), White
patent: 1820985 (1931-09-01), McKee
patent: 2193531 (1940-03-01), Esual
patent: 2225338 (1940-12-01), Geiss
patent: 2430843 (1947-11-01), Colwell

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