SUPPLEMENTAL AIR COOLING SYSTEM AND AIR PRESSURE OIL SEALING SYSTEM FOR ELECTRICAL TURBOCOMPOUND MACHINE

摘要

An electrically assisted turbocharger (10) includes an air cooling system for cooling an electric motor (52) housed within a motor chamber (54) in a bearing housing (12). An inlet volute (76) is formed in the bearing housing (12) on a first side of the electric motor (52) and an outlet volute (78) is formed in the bearing housing (12) on a second side of the electric motor (52) opposite from the inlet volute (76). The inlet volute (76) accelerates cooling air that is fed into the inlet volute (76) and directs the cooling air into the motor chamber (54). The cooling air travels in an axial direction through the motor chamber (54) from the inlet volute (76) to the outlet volute (78), thereby cooling the electric motor (52). The outlet volute (78) decelerates the cooling air and directs the cooling air out of the motor chamber (54).

主权项

1. A turbocharger (10) including an air cooling system for cooling an electric motor (52) with cooling air, said turbocharger (10) comprising:
a bearing housing (12) including a motor chamber (54) for housing the electric motor (52); an inlet volute (76) formed in said bearing housing (12) and disposed on a first side of the electric motor (52), wherein said inlet volute (76) accelerates the cooling air that is fed into said inlet volute (76) and directs the cooling air into said motor chamber (54); and an outlet volute (78) formed in said bearing housing (12) and disposed on a second side of the electric motor (52) opposite from said inlet volute (76), wherein said inlet volute (76) and said outlet volute (78) are spaced apart in an axial direction, and wherein said outlet volute (78) decelerates the cooling air and directs the cooling air out of said motor chamber (54); wherein the cooling air travels in said axial direction through said motor chamber (54) from said inlet volute (76) to said outlet volute (78) thereby cooling the electric motor (52).