Hermatically sealed motor blower unit with stator inside hollow armature
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.
- Research Organization:
- Columbia Univ., New York, NY (United States)
- DOE Contract Number:
- W-7405-ENG-50
- Assignee:
- Donelian, Khatchik O. (New York, NY)
- Patent Number(s):
- 3,933,416
- Application Number:
- 02/591240
- OSTI ID:
- 862449
- Resource Relation:
- Patent File Date: 1945 May 01
- Country of Publication:
- United States
- Language:
- English
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motor
blower unit
stator
hollow armature
sealed housing
mounted
central cavity
radial load
shaft
electric
means
rotating
motor-stator
motor-rotor
relatively
reduce
thrust plate
thrust collar
discharge
impeller
fluid
pumped
flow
directly
bearing
surfaces
lubricate
plate mounted
electric motor
motor means
bearing surface
reduce electrical
fluid pump
axial thrust
journal bearing
means comprising
sealed motor
motor blower
electrical losses
unit comprising
fluid pumped
reduce electric
wall form
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