Turbocharger with nozzle ring coupling

Details Turbocharger with nozzle ring coupling Turbocharger with nozzle ring coupling

F - Mech Eng,Light,Heat,Weapons

02

B

F02B 37/00 (2006.01) F01D 9/02 (2006.01) F01D 11/00 (2006.01) F01D 25/24 (2006.01)

Patent

CA 2352027

A turbocharger includes a rotor having coaxial turbine and compressor wheels. In a preferred embodiment, a turbine inlet scroll conducts exhaust gas toward the turbine wheel and an exhaust duct carries exhaust gas away from the turbine wheel. A turbine nozzle ring coupled between the inlet scroll and the exhaust duct defines an annular passage including angled stator blades and vanes that direct gas angularly against energy converting blades of the turbine wheel. Ring seals at outer and inner edges of the nozzle ring inlet end seal the inlet end against loss of gas pressure. They may also form springs that axially bias the nozzle ring against a stop to fix the axial position of the nozzle ring. The nozzle ring is centered by radial guides at the outlet end which may include at least three radial keys on the nozzle ring engaging mating guide slots connected with the exhaust duct. The guides maintain axial alignment of the nozzle ring and an integral shroud with the rotor axis while accommodating relative thermal growth of the connected components.

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