FIBER PREFORM FOR A HOLLOW TURBINE ENGINE VANE Russian patent published in 2018 - IPC B29B11/16 B29C70/24 B29C70/48 F01D5/28 

FIELD: machine building.

SUBSTANCE: invention relates to a fiber preform for a hollow turbine engine vane, to such a hollow vane, and to a method of fabricating such a hollow vane. Invention also relates to a turbine engine and to an aircraft including such a hollow vane. Fiber preform for a hollow turbine engine vane comprises a main fiber structure obtained by three-dimensional weaving and including at least one main part, wherein the main part extends from a first link strip, includes a first main longitudinal portion suitable for forming essentially a pressure side wall of an airfoil, then includes a U-turn bend portion (45) suitable for forming, essentially, a pressure side wall (26) of an airfoil, then includes a 180°-turn bend portion, suitable for forming, essentially a leading edge or a trailing edge of the airfoil, then includes a second main longitudinal portion facing the first main longitudinal portion and suitable for forming, essentially a suction side wall of the airfoil, and terminating at a second link strip, first and second link strips are secured to each other and form a link portion of the main fiber structure, and the main longitudinal portions are spaced apart so as to form a gap between said main longitudinal portions suitable for forming a hollow in the airfoil.

EFFECT: invention provides a hollow vane having a low weight because of its hollow, which is a one-piece structure that presents very good mechanical properties.

14 cl, 12 dwg