| 摘要 |
<p>The invention concerns a side-plate (10) covering a turbine blade (4) disc (3) enabling its ventilation (27, 29) and whereof the surface (24) facing away from the disc (3) is provided with a labyrinth seal (20) comprising thin cascading elements (23) to provide a leaktightness is characterised in that the blades of the thin cascading elements (23) are axially inclined and axially and radially offset, so as to slew the centre of gravity of the flexible web (14) of the side-plate and promote deformation of the web (14) towards the disc (3) under the effect of centrifugal forces, so as to reinforce the contact of a support bearing (15) with a plate (16) of the disc (3). The hooks whereby the periphery of the web (14) is often assembled to the disc (3) are not required.</p> |
