Patent ID: 9093871
Filing Date: 2015-07-28
Classification: F03B,F04D,F05B,H02K,Y02E,Y02T

Abstract:
1. A fluid pumping and energy recovery device, comprising: a housing defining an impeller chamber and a motor/generator chamber; an impeller in the impeller chamber; a motor/generator in the motor/generator chamber and comprising a stator and a rotor, the rotor coupled to the impeller and supported to rotate in the stator and generate electrical power in a generating mode and rotate in response to electrical power applied to the stator in a motoring mode; and one or more seals adapted to seal against a rotating surface of the device, the one or more seals including at least one seal configured to seal against the rotating surface of the device rotating in a first direction and including at least one seal configured to seal against the rotating surface of the device rotating in a second, opposite direction, the one or more seals configured to hydraulically isolate the impeller chamber from the motor/generator chamber.