| 摘要 |
The invention relates to a hollow blade comprising an internal cooling passage (24), an open cavity (30) located at the tip (14) of the blade and bounded by an end wall (26) and a rim (28) and cooling channels (32) that connect the said internal cooling passage (24) to the outer face of the pressure wall (16), the said cooling channels (32) being inclined to the pressure wall (16) in such a way that they emerge on the outer face of the pressure wall (16) near the top (28a) of the said rim. By way of feature, a reinforcement of material (34) is present between the rim (28) and the end wall (26) of the cavity (30) along at least one portion of the pressure wall (16), whereby the said rim (28) is widened at its base adjacent to the said end wall (26) in such a way that the cooling channels (32) emerge near the top (28a) of the rim (28) without reducing the mechanical strength of the tip (14) of the blade.
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