Electrical generator or motor structure – Dynamoelectric – Rotary
Patent
1996-12-09
1998-08-18
Dougherty, Thomas M.
Electrical generator or motor structure
Dynamoelectric
Rotary
310 87, 310 88, 310 89, H02K 510, H02K 512
Patent
active
057961972
ABSTRACT:
An oil-filled, submersible electric motor which contains features designed to prevent both the ingress of well fluid into the motor interior, and the leakage of fluid from the motor interior. The motor contains a liquid-filled top chamber, above the motor's stator and rotor. This top chamber connects, via a tube, with a pressure-relief chamber at the bottom of the motor so that any liquid which migrates into the top of the motor is channeled away from the stator and rotor. The relief chamber also serves as a reservoir to replace any liquid which seeps out of the top chamber. The motor also incorporates a pressure-equalization chamber, beneath the stator and rotor, to accommodate thermal expansion of the dielectric fluid in the motor interior. A bladder in the equalization chamber expands and contracts to keep the motor interior and the well fluid in pressure equilibrium.
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Dougherty Thomas M.
Enad Elvin G.
Franklin Electric Co. Inc.
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