Compressor arrangement suitable for transport refrigeration systems

A refrigerant compressor system suitable for transport refrigeration applications, comprising:

• an electric motor having a stator and rotor, with the rotor having first and second axial ends,
• a refrigerant compressor coupled to the first axial end of said rotor, with said refrigerant compressor including lubricating oil,
• a hydraulic motor coupled to the second axial end of said rotor,
• hydraulic fluid for driving said hydraulic motor, and
• a single housing surrounding said electric motor, said refrigerant compressor, and said hydraulic motor,
• said hydraulic fluid being compatible with the lubricating oil of said refrigerant compressor, whereby leakage from the hydraulic motor within the housing will not adversely affect the operation of the refrigerant compressor system,
• said electric motor being devoid of separate support bearings, with the refrigerant compressor and the hydraulic motor providing the sole support for the rotor of the electric motor.

A refrigerant compressor system suitable for transport refrigeration applications, comprising:

• an electric motor having a stator and rotor, with the rotor having first and second axial ends,
• a refrigerant compressor coupled to the first axial end of said rotor, with said refrigerant compressor including lubricating oil,
• a hydraulic motor coupled to the second axial end of said rotor,
• hydraulic fluid for driving said hydraulic motor,
• a single housing surrounding said electric motor, said refrigerant compressor, and said hydraulic motor,
• said hydraulic fluid being compatible with the lubricating oil of said refrigerant compressor, whereby leakage from the hydraulic motor within the housing will not adversely affect the operation of the refrigerant compressor system, and
• a refrigeration system having high pressure and low pressure sides,
• said housing being sealed to the atmosphere and directly connected to a selected side of the refrigeration system.

A refrigerant compressor system suitable for transport refrigeration applications, comprising:

• an electric motor having a stator and rotor, with the rotor having first and second axial ends,
• a refrigerant compressor coupled to the first axial end of said rotor, with said refrigerant compressor including lubricating oil,
• a hydraulic motor coupled to the second axial end of said rotor,
• hydraulic fluid for driving said hydraulic motor, and
• a single housing surrounding said electric motor, said refrigerant compressor, and said hydraulic motor,
• said hydraulic fluid being compatible with the lubricating oil of said refrigerant compressor, whereby leakage from the hydraulic motor within the housing will not adversely affect the operation of the refrigerant compressor system,
• said housing including at least first and second housing parts joined by a sealed flange joint which is openable for maintenance purposes.

A refrigerant compressor system suitable for transport refrigeration applications, comprising:

• an electric motor having a stator and rotor, with the rotor having first and second axial ends,
• a refrigerant compressor coupled to the first axial end of said rotor, with said refrigerant compressor including lubricating oil,
• a hydraulic motor coupled to the second axial end of said rotor,
• hydraulic fluid for driving said hydraulic motor,
• a single housing surrounding said electric motor, said refrigerant compressor, and said hydraulic motor,
• said hydraulic fluid being compatible with the lubricating oil of said refrigerant compressor, whereby leakage from the hydraulic motor within the housing will not adversely affect the operation of the refrigerant compressor system,
• said electric motor functioning as an induction alternator while the hydraulic motor is operative, and
• a refrigeration system connected to the refrigerant compressor,
• said refrigeration system including electrically driven evaporator and condenser air mover means which receive electrical power from the electric motor while the electric motor is functioning as an induction alternator.