Impeller having spoilers for a turbine engine turbine

A turbine engine impeller having a longitudinal axis, comprising a disc bearing vanes, the roots of which are fitted in grooves which are substantially parallel to an axis of revolution of the disc, the root of each vane being connected to a blade by an integrated platform, the platforms of said vanes cooperating so as to form a radially inner wall of a duct for a flow passing through the blades, the impeller further comprising a first and a second independent annular plates which are fixed to the disc,

• said first plate being mounted upstream or downstream of the disc by screw and nut, and comprising a transverse annular portion which is supported on an upstream or downstream face of the roots of the vanes, and
• said second plate being mounted downstream or upstream of the disc and opposite to the first plate according to the longitudinal axis, the second plate comprising a transverse annular portion which is supported on a downstream or upstream face of the roots of the vanes, said second plate comprises a scalloped portion which is shaped so as to cooperate in a form-fitting manner with a complementary scalloped portion of the disc so as to fix said plate to the disc, said scalloped portion bearing against the upstream or downstream face of the disc,
• wherein one of the first plate and second plate comprises at least one finger extending axially, said finger being inserted in a cavity of the disc,
• wherein the integrated platform of each vane has no spoiler and stops axially with respect to and is arranged perpendicular to the upstream and downstream transverse faces of the root, in that said transverse annular portion of each of said plates radially covers at least a space separating the integrated platforms and the disc, and bears, between the integrated platforms and the disc, an annular spoiler which is configured to extend in an axial space between the impeller and an adjacent module of the turbine engine without rubbing against an element of said module, wherein the disc is a downstream disc, the first plate being mounted upstream of said downstream disc and is coupled to a downstream annular plate of an upstream disc.