초록 ▼

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 an

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.

대표청구항 ▼

[ What is claimed is:] [1.]1. A turbocharger comprising:a rotor rotatable on an axis and including coaxial turbine and compressor wheels;a turbine inlet means configured to conduct engine exhaust gas to adjacent the turbine wheel;an exhaust duct means configured to conduct turbine exhaust gas from t

[ What is claimed is:] [1.]1. A turbocharger comprising:a rotor rotatable on an axis and including coaxial turbine and compressor wheels;a turbine inlet means configured to conduct engine exhaust gas to adjacent the turbine wheel;an exhaust duct means configured to conduct turbine exhaust gas from the turbine;a turbine nozzle ring defining an annular passage having an inlet end positioned to receive exhaust gas from the turbine inlet means, an outlet end closely surrounding the turbine wheel and stator blades between the ends for directing exhaust gas angularly against energy converting blades of the turbine wheel;the nozzle ring outlet end including at least three radial guides centered on the axis and engaging radial guide means connected with the exhaust duct to maintain axial alignment of the nozzle ring with the axis of the rotor; andseal means at inner and outer edges of the nozzle ring inlet end to seal the edges against leakage of pressurized exhaust gas.