Turbocharger, nozzle vane for turbocharger, and turbine
AssigneeMitsubishi Heavy Industries Engine & Turbocharger, Ltd.
InventorsBipin Gupta, Toyotaka Yoshida, Yosuke Dammoto, Yoji Akiyama
Life of this patent
Estimating the term…
Abstract
A turbocharger includes: a turbine wheel; a hub-side wall surface and a shroud-side wall surface which face each other and which together form a flow path for exhaust gas to flow into the turbine wheel; and a nozzle vane which has a shroud-side end surface facing the shroud-side wall surface and a hub-side end surface facing the hub-side wall surface and which is rotatably disposed in the flow path. The nozzle vane has a pressure surface which is, at least on a shroud side, oblique toward a downstream side of the exhaust gas with a distance in a vane height direction from the shroud-side end surface.
Claims9
A turbocharger comprising:
- a turbine wheel;
- a hub-side wall surface and a shroud-side wall surface which face each other and which together form a flow path for exhaust gas to flow into the turbine wheel;
- and
- a nozzle vane which has a shroud-side end surface facing the shroud-side wall surface and a hub-side end surface facing the hub-side wall surface and which is rotatably disposed in the flow path,
- wherein the nozzle vane has a pressure surface which is, at least on a shroud side, oblique toward a downstream side of the exhaust gas with a distance in a vane height direction from the shroud-side end surface, and
- wherein an x-axis is taken along a normal direction of a camber line of the nozzle vane from the pressure surface toward a suction surface of the nozzle vane, and a y-axis is taken along the vane height direction from the hub-side end surface toward the shroud-side end surface, coordinates (xs, ys) of the suction surface on a trailing edge side of the nozzle vane and coordinates (xp, yp) of the pressure surface on a leading edge side of the nozzle vane satisfy the following relational expression within a positional range in the vane height direction including the shroud-side end surface:
- 0
- <
- dy
- s
- dx
- s
-
- <
- dy
- p
- dx
- p
- .
A nozzle vane for a turbocharger, comprising:
- a vane body having a shroud-side end surface and a hub-side end surface;
- and
- a rotatable shaft to rotate the vane body,
- wherein the vane body has a pressure surface which is, at least within a positional range in a vane height direction including the shroud-side end surface, oblique toward a side of a pressure surface of the vane body with a distance in the vane height direction from the shroud-side end surface, and
- wherein an x-axis is taken along a normal direction of a camber line of the vane body from the pressure surface toward a suction surface of the vane body, and a y-axis is taken along the vane height direction from the hub-side end surface toward the shroud-side end surface, coordinates (xs, ys) of the suction surface on a trailing edge side of the vane body and coordinates (xp, yp) of the pressure surface on a leading edge side of the vane body satisfy the following relational expression within a positional range in the vane height direction including the shroud-side end surface:
- 0
- <
- dy
- s
- dx
- s
-
- <
- dy
- p
- dx
- p
- .
Dependencies are inferred from the claim text.