Turbine wheel for a turbine engine

摘要

A turbine wheel for a turbine engine, comprising a disk carrying blades, each having a platform carrying an airfoil and connected by a tang to a root, and sealing and damping sheets housed in the inter-tang spaces, the platforms including projections on their radially internal faces against which the sheets bear radially in operation, in order to define radial clearance and create at least one space between the sheets and the platforms, and the sheets including holes for feeding air to the or each space.

主权项

1. A turbine wheel for a turbine engine, comprising a disk carrying blades and sealing and damping sheets, each blade having a platform carrying an airfoil and connected by a tang to a root, the roots of the blades being engaged in grooves at the periphery of the disk and their tangs leaving between them spaces for housing the sheets, at least one airflow space being formed between the internal faces of the platforms and said sheets, the sheets including air-passing holes for feeding the or each space with air and for cooling the platforms, wherein the platforms include discrete studs or lugs on their radially internal faces that form discrete projections against which the sheets bear radially and that define radial clearance between the sheets and the internal faces of the platforms, and that allow the air from each air-passing hole to flow all around the studs or lugs and along the radially internal faces of the platforms, each platform further comprising at least one through orifice exhausting the air outside the airflow spaces.