ROTOR PUMP WITH SYNCHRONOUS ELECTRIC MOTOR AND VISCOUS COUPLING Russian patent published in 2012 - IPC F04D13/02 F04D29/66 H02K7/118 

FIELD: household appliances.

SUBSTANCE: invention can be used in pumps of washing and dish washing machines. Rotor pump has electric motor including stator and corresponding rotor, the first device connecting the rotor with driving shaft 3 and second device connecting the end of the driving shaft 3 with impeller 4. The second device is a viscous coupling of static type which includes tank with medium with statically viscous liquid properties. The second device includes hollow element made as sealed cylindrical cavity 20 in impeller 4 at the side facing the shaft 3, guide element 21 toughly connected with the end of driving shaft 3 facing impeller 4 and installed in the mentioned cavity 20 and sealing element 23 with corresponding hole 24 for the shaft 3 movement. Cavity 20 limits the tank with statically viscous medium inserted into clearance 22 between the guiding element 21 and hollow element 20.

EFFECT: invention allows reducing noise occurring during connection of electric motor shaft with pump impeller.

1 dwg