EXHAUST TURBINE ASSEMBLY

摘要

An assembly can include a turbine wheel; a turbine housing that includes a lower turbine housing surface that extends from an exhaust volute to a cylindrical surface that defines an upper portion of a turbine wheel space; a shroud component that includes a contoured surface disposed between an inner end of an upper shroud component surface and an inner end of a lower shroud component surface where the contoured surface defines a lower portion of a turbine wheel space; and a seal mechanism where the turbine housing and the shroud component form an axial gap between a lower axial position of the cylindrical surface and an upper axial position of the contoured surface where the axial gap is axially positioned between an axial position of an inducer portion of the turbine wheel and an axial position of an exducer portion of the turbine wheel.

主权项

1. An assembly comprising:
a turbine wheel that comprises a base, a nose, a rotational axis extending from the base to the nose, an inducer portion and an exducer portion; a turbine housing that at least in part defines an exhaust volute and that comprises a lower turbine housing surface that extends from the exhaust volute to a cylindrical surface that defines an upper portion of a turbine wheel space; a shroud component that comprises an upper shroud component surface, a lower shroud component surface and a contoured surface disposed between an inner end of the upper shroud component surface and an inner end of the lower shroud component surface wherein the contoured surface defines a lower portion of a turbine wheel space; and a seal mechanism wherein the turbine housing receives the shroud component and forms an axial gap between a lower axial position of the cylindrical surface and an upper axial position of the contoured surface, wherein the turbine housing and the shroud component receive at least a portion of the turbine wheel, wherein the axial gap is axially positioned between an axial position of the inducer portion of the turbine wheel and an axial position of the exducer portion of the turbine wheel and wherein the seal mechanism hinders flow of exhaust from the exhaust volute to the turbine wheel space via the axial gap.