Systems and methods for regulating fluid flow for internal cooling and lubrication of electric machines
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United States of America Patent
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Oct 28, 2014
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app pub date -
Dec 8, 2011
filing date -
Aug 25, 2010
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Abstract
Systems and methods are provided for cooling and lubrication of high power density electric machines with an enhanced fluid injection system. Multiple fluid flow passages are within the electric machine, which include a bearing fluid flow pathway and a rotor fluid flow pathway. The bearing fluid flow pathway comprises a passage which directs fluid to contact a bearing for lubrication and cooling. The rotor fluid flow pathway comprises a passage which directs fluid along the rotatable shaft toward the rotor and stator for cooling. A fluid flow passage may lead to a junction, and may split between the bearing fluid flow pathway and the rotor fluid flow pathway. Additionally, a fluid flow metering device at the junction between the bearing fluid flow pathway and the rotor fluid flow pathway, may determine the relative amount of fluid that flows to the bearing and that flows toward the rotor and stator.
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