Electrically-driven rotary pump

Details Electrically-driven rotary pump Electrically-driven rotary pump

1990-07-02

1991-08-13

Smith, Leonard E.

Pumps

Motor driven

Electric or magnetic motor

4174242, 4174233, 415129, F04B 126

Patent

active

050392867

ABSTRACT:
A centrifugal pump, intended for pumping liquids, includes a impeller (1) connected in rotation to a rotor (7) with a permanent magnet that is part of a synchronous motor. The rotor (7) which has an axial clearance (L) is accommodated in a cylindrical housing (10) that is part of the body (9) of stator (8) of the motor. To orient the drive direction (F) of rotor (7) on the starting of the pump, complementary configurations are provided on the front face of rotor (7) away from impeller (1) and at the bottom of housing (10). These configurations comprise helicoidal surfaces (14, 16) connected at their ends by notches (15, 17).

REFERENCES:
patent: 2722615 (1955-11-01), Morganson
patent: 3821567 (1974-06-01), Erwin

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