BLADE OF TURBOMACHINE STATOR COMPRISING CONVEX SECTION Russian patent published in 2018 - IPC F01D5/16 F01D9/04 F04D29/66 

FIELD: machine engineering.

SUBSTANCE: stator blade (10) of the turbomachine compressor stator having a main radial direction R with respect to the main axis of the turbomachine. The blade comprises a radially inner portion (12) called the blade root, a radially outer portion (14) called the blade head, and a radially middle portion (16). The blade (10) comprises a portion (34) bent in tangential direction and at least one rectilinear portion in the blade root portion (12), blades and/or in the blade head portion (14). In tangential direction, the amplitude A of convex portion (34) is from 1% to 5% of blade (10) radial length L. Said straight portion is inclined at an angle greater than zero and less than or equal to 30°, relative to the radial main direction R of the blade (10).

EFFECT: said tangentially convex portion changes blade vibration response to vibrational stresses and diverts so-called risk frequencies beyond the limits of the blade working range.

8 cl, 2 dwg