Patent ID: 7229259
Filing Date: 2007-06-12
Classification: F04B

Abstract:
1. A compressor comprising: an electric motor having a stator and a rotor, said rotor driving a shaft for rotation, and said motor being mounted in a motor chamber, said motor chamber including a suction inlet for receiving a fluid to be compressed, such suction inlet passing the fluid to be compressed over said motor to cool said motor; a compressor housing, said compressor housing being mounted adjacent to said motor chamber, said compressor housing including a compressor pump unit driven by said shaft to compress a fluid, and said compressor pump unit including a chamber for receiving refrigerant from said motor chamber to be compressed by said compressor pump unit, said compressor pump unit including reciprocating pistons movable within said chambers, a lubricant supply system included for supplying a lubricant to said shaft said shaft including a bearing mounted at an end of said motor rotor adjacent to said compressor housing, and a mount for said bearing, a lubricant supply for supplying lubricant to a location on the shaft remote from the motor, and lubricant flowing along a passage on the shaft toward the motor, said mount including an oil return passage for returning lubricant from said bearing toward an end of said bearing spaced away from said motor; said compressor housing separated from said motor housing by said mount, said mount including drain passages for guiding a returned lubricant away from said motor rotor; and said bearing provided with a notch for supplying lubricant through said bearing to said mount, said mount being provided with a drain passage for directing lubricant to said end of said bearing remote from said motor rotor.