| 摘要 |
The invention relates to a turbomachine blade-wheel and a system for controlling the leak zone under the platforms (34) of blades (33) belonging to the impeller (30) of a turbomachine is disclosed, using liners (10) having edges (13, 14, 15, 18) which are flared radially inwards. Said liners are disposed in the inter-blade cavities (37) which are defined by the platforms, the radial walls upstream and downstream of the blades and the periphery of the disk (31) of the impeller. According to the invention, one of the flared edges, upstream or downstream, comprises an elastic zone (18) which rests against a surface (39) of the adjacent radial wall (35), which is inclined in relation to a radial plane, such that, under the action of centrifugal forces, the liner (10) moves axially towards the opposite radial wall (36) in order to improve the sealing in said zone. Moreover, when the impeller stops, the aforementioned elastic zone (18) moves radially inwards and the liner (10) pivots around an axis (44) at a distance from said elastic zone (18). |
