Axial turbine with parallel flow compressor
AssigneeHoneywell International Inc.
InventorsJeffrey A. Lotterman, Vaclav Kares, Milan Nejedly, Daniel Turecek, Josef Ferda, Tomas Baron, Vit Houst
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Abstract
A turbocharger including a turbine wheel having a hub-to-tip ratio of no more than 60% and blades with a high turning angle, a turbine housing forming an inwardly spiraling primary-scroll passageway that significantly converges to produce highly accelerated airflow into the turbine at high circumferential angles, and a two-sided parallel compressor. The compressor and turbine each produce substantially no axial force, allowing the use of minimal axial thrust bearings.
Claims15
A turbocharger configured to receive an exhaust gas stream from an engine, and input air from an air source, comprising:
- a turbocharger housing including a turbine housing and a compressor housing;
- and
- a rotor configured to rotate within the housing along an axis of rotor rotation, the rotor including a turbine wheel, a compressor wheel, and a shaft extending along the axis of rotor rotation and connecting the turbine wheel to the compressor wheel;
- wherein the turbine wheel and the turbine housing form a turbine configured to extract energy from the exhaust gas stream, and to thereby drive the rotor in rotation around the axis of rotor rotation;
- wherein the compressor wheel and compressor housing form a compressor configured to compress the input air into the pressurized air stream when the rotor is driven in rotation around the axis of rotor rotation by the turbine wheel;
- wherein the turbine is configured to limit the static pressure upstream of the wheel near the wheel hub to a value that is not greater than 120% of the turbine outlet static pressure for at least some operating conditions;
- and
- wherein the compressor is configured to produce substantially no axial load on the rotor.
Dependencies are inferred from the claim text.