FIELD: machine building.
SUBSTANCE: proposed is platform (30) intended for arrangement between two adjacent blades (20) of fan (2) and comprising wall (34) of passage, lower wall (36), as well as axial and radial retaining surfaces. Wall (34) of passage defines fan air flow passage (2), lower wall (36) is main surface (36a) for tight fit to fan disc (40), and axial and radial retaining surfaces are located on two axial ends of platform (30). Radial retaining surface (38) located on platform (30) upper axial end, is radially offset from main surface (36a) of lower wall (36) in the direction in which bottom wall (36) is tightly adjacent to disc (40).
EFFECT: invention provides the least possible hub ratio at limitation of stresses on the tooth and groove of the disc.
10 cl, 6 dwg
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