Turbine
AssigneeCummins Inc.
InventorsRobert Dewhirst, Carl M. Wilson
Life of this patent
Estimating the term…
Abstract
There is provided a nozzle ring for a turbine of a turbocharger. The nozzle ring comprises: a nozzle dividing wall, at least on nozzle vane, and a circumferentially extending outer rim. The nozzle dividing wall extends generally perpendicular to a longitudinal axis of the nozzle ring. The at least one nozzle vane extends from the nozzle dividing wall and has a leading edge defining a first radius relative to the longitudinal axis. The circumferentially extending outer rim defines a second radius relative to the longitudinal axis. The ratio of the second radius to the first radius is at least around 1.05.
Claims18
The nozzle ring for a turbine of a turbocharger, the nozzle ring comprising:
- a nozzle dividing wall extending generally perpendicular to a longitudinal axis of the nozzle ring;
- and
- at least one nozzle vane extending from the nozzle dividing wall and having a leading edge defining a first radius relative to the longitudinal axis;
- wherein the nozzle dividing wall further comprises a circumferentially extending outer rim defining a second radius relative to the longitudinal axis;
- and
- wherein the ratio of the second radius to the first radius is at least around 1.05, and wherein at least one of:
- the nozzle dividing wall comprises an annular flange from which the at least one nozzle vane extends, and wherein the outer rim is radially outwards of
- the annular flange relative to the longitudinal axis so as to facilitate widening of
- the outer rim relative to the nozzle dividing wall and
- the outer rim of the nozzle dividing wall comprises a circumferentially extending groove configured to receive a sealing element.
The nozzle ring assembly comprising:
- a nozzle ring according to any preceding claim, wherein the nozzle ring is a first nozzle ring;
- and
- a second nozzle ring, the second nozzle ring comprising:
- a side wall extending generally perpendicular to the longitudinal axis;
- and at least one nozzle vane extending from the side wall;
- wherein the at least one nozzle vane of the first nozzle ring is configured to engage a radially extending surface of a turbine housing such that the nozzle dividing wall of the first nozzle ring and the turbine housing define a first inlet passage therebetween, and
- wherein the at least one nozzle vane of the second nozzle ring is configured to engage the nozzle dividing wall of the first nozzle ring such that the side wall of the second nozzle ring and the nozzle dividing wall of the first nozzle ring define a second inlet passage therebetween.
The turbine for a turbocharger, the turbine comprising:
- a turbine wheel supported for rotation about a turbine axis;
- a turbine housing comprising:
- a first volute housing portion at least partially defining a first inlet volute;
- a second volute housing portion at least partially defining a second inlet volute;
- a housing dividing wall at least partially defining the first and second inlet volutes so as to separate the first inlet volute from the second inlet volute;
- and
- a nozzle ring or nozzle ring assembly according to any preceding claim, the nozzle ring or nozzle ring assembly being arranged such that the longitudinal axis is collinear with the turbine axis;
- wherein the nozzle dividing wall and the housing dividing wall are substantially aligned with one another along the turbine axis.
Dependencies are inferred from the claim text.