SEALED ELECTRIC PUMP Russian patent published in 1994 - IPC

FIELD: power engineering. SUBSTANCE: rotor of sealed shielded electric motor rotates with pump impeller in working fluid and carries a flywheel. The pump casing is of strong-and-tight design. The flywheel is mounted on end of rotor opposite to impeller, outside of electric motor, and is separated from its rotor chamber by the first end seal. The second end seal is disposed on opposite side of the flywheel. Seals installed in casing form a chamber communicating with atmosphere and accommodating the flywheel, and a chamber at the side of the second seal which communicates with the high-pressure zone of electric pump. EFFECT: improved design. 1 dwg