Production of turbines for turbine engines having blades...

Details Production of turbines for turbine engines having blades... Production of turbines for turbine engines having blades...

F - Mech Eng,Light,Heat,Weapons

01

D

F01D 5/16 (2006.01) F01D 5/10 (2006.01) F01D 5/22 (2006.01) F01D 5/26 (2006.01)

Patent

CA 2457256

For the or each moving wheel of the turbine, blade inserts (40) are used each comprising at least two blades (42, 44) interconnected by common outer (46) and inner (48) platforms and sharing a common root (60). Inserts are used having hollow roots (60) in which respective recesses are formed (62), and the roots of inserts (60) belonging to the same wheel and/or the roots of inserts belonging to two different wheels are voluntarily given different configurations in the inserts of the roots so as to adjust the resonant frequencies of said inserts to values that are significantly different, thereby ensuring that the inserts in the same wheel and/or between two different wheels are out of tune. The invention is applicable to turbines both for aviation and for industrial applications.

Pour la ou chaque roue mobile de la turbine, on utilise des aubes (40) comportant chacune au moins deux pales (42, 44) réunies à une plate-forme externe (46), une plate-forme interne (48) et un pied (60) communs. On utilise des aubes ayant un pied creux (60) dans lequel est formé un évidemment (62), et on confère volontairement aux pieds d'aubes (60) appartenant à une même roue et/ou aux pieds d'aubes appartenant à deux roues différentes des configurations différentes au niveau des évidements de leurs pieds pour ajuster les fréquences de résonance propres de ces aubes à des valeurs sensiblement différentes et réaliser ainsi un désaccordage entre aubes d'une même roue et/ou de deux roues différentes. L'invention est applicable aux turbines aéronautiques et industrielles.

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