Hermetic dynamoelectric device with two-phase refrigerant cooling and sealing

A hermetic motor comprising a housing defining a motor plenum adapted for fluid communication with an associated evaporator, said housing also defining a refrigerant plenum in fluid communication with said motor plenum, a bearing supported by said housing, a shaft journaled in said bearing, a first seal interposed between said bearing and motor plenum and defining with said bearing a first oil chamber, a second seal interposed between said bearing and refrigerant plenum and defining with said bearing a second oil chamber, said chambers being adapted for fluid communication with an associated oil reservoir, said shaft having a stepped bore including a first relatively small bore portion in fluid communication with said refrigerant plenum, a second relatively large bore portion in fluid communication with said first bore portion, and a shoulder at the junction of said bore portions, a rotor secured to said shaft, a stator secured to said housing, a plurality of jets adjacent said rotor in fluid communication with said second bore portion, and a line adapted for fluid communication with an associated condenser, said line being in fluid communication with said second bore portion for delivery of liquid refrigerant thereto.