Compressor with cooling pump

A compressor motor cooler comprising:

• a cooling housing having a fluid inlet and a fluid outlet;
• a pump housing having a central aperture defining an inlet notch and an outlet notch;
• a pump disposed within the central aperture and moving about a circumference of the central aperture to pump a working fluid from the fluid inlet, through the inlet notch, about the central aperture, through the outlet notch, and to the fluid outlet;
• and
• an upper thrust plate disposed between the cooling housing and the pump housing, the upper thrust plate having an inlet aperture aligning with the fluid inlet of the cooling housing and the inlet notch of the pump housing and an outlet aperture aligning with the fluid outlet of the cooling housing and the outlet notch of the pump housing.

A compressor comprising:

• a compression mechanism configured to compress a first working fluid;
• a bearing housing engaged with the compression mechanism;
• a motor;
• a drive shaft engaging the motor and the compression mechanism and extending through the bearing housing;
• a motor cooler engaged with the bearing housing, the motor cooler including a pump configured to pump a second working fluid into a cavity surrounding the motor;
• an upper counterweight fixed for rotation with the drive shaft;
• and
• an eccentric drive mechanism fixed for rotation with the upper counterweight,
• wherein the eccentric drive mechanism includes an axial sleeve that engages an inner circumference of the pump,
• wherein rotation of the eccentric drive mechanism movement of the pump within the pump housing, and
• wherein rotation of the drive shaft drives the pump in the motor cooler to pump the second working fluid.