ELECTRICALLY DRIVEN PUMP WITH MOTOR BUILT AROUND PERMANENT MAGNETS Russian patent published in 2014 - IPC H02K44/02 F04D13/06 F04D29/04 

FIELD: engines and pumps.

SUBSTANCE: invention relates to glandless shielded corrosion-resistant electric pump including bearing control device. Increasing of fixed shaft stiffness increases the steps that follow. The step whereat shielded motor rear housing metal structure shaft rear support is fitted in axial direction into shielded motor internal rotor inside. The step whereat shaft metal rear support is tightly secured to shaft rear seat to up the fixed shaft stiffness owing to longer length of retention and to decrease that of resultant force arm. Control device to detect bearing wear is fitted in ring groove protected by shaft rear seat.

EFFECT: higher stiffness of pump fixed shaft, early bearing wear detection, longer life.

23 cl, 18 dwg