US 12,221,982 B1
Turbocharger having compressor with liquid-cooled backplate
Philippe Arnold, Thaon-les-Vosges (FR); Nathaniel Bontemps, Thaon-les-Vosges (FR); and Peter Davies, Thaon-les-Vosges (FR)
Assigned to Garrett Transportation I Inc., Torrance, CA (US)
Filed by Garrett Transportation I Inc., Torrance, CA (US)
Filed on Aug. 8, 2023, as Appl. No. 18/366,675.
Int. Cl. F04D 29/58 (2006.01); F01D 25/12 (2006.01); F02C 6/12 (2006.01)
CPC F04D 29/584 (2013.01) [F01D 25/12 (2013.01); F02C 6/12 (2013.01); F05D 2220/40 (2013.01); F05D 2260/213 (2013.01)] 14 Claims
OG exemplary drawing
 
1. A compressor for a turbocharger, comprising:
a compressor wheel and a compressor housing, the compressor wheel being affixed to a shaft and being disposed in the compressor housing, the compressor wheel comprising a first impeller having a first back disk, the compressor housing defining a first air inlet for leading air into the first impeller, a first volute surrounding the first impeller and configured for receiving pressurized air from the first impeller, and a first diffuser leading from the first impeller into the first volute;
the compressor housing including a backplate, the backplate having a first face opposing the first back disk, the backplate defining a coolant inlet, a coolant passage for circulating a liquid coolant through the backplate, and a coolant outlet;
a turboexpander comprising an air-driven turbine wheel mounted in a turbine housing, and a connecting conduit leading pressurized air from the first volute into the air-driven turbine wheel, the turboexpander expanding and cooling the pressurized air; and
a liquid-cooled heat exchanger disposed in heat-transfer communication with the turboexpander.