STATOR BLADE WITH ALTERNATE ANGLE OF ASSEMBLY, GAS TURBINE MOTOR WITH SUCH BLADE AND PROCEDURE FOR REPAIR OF SUCH BLADE Russian patent published in 2011 - IPC F01D17/16 F04D29/56 F01D9/02 

FIELD: machine building.

SUBSTANCE: stator blade with alternate angle of assembly installed in case of gas-turbine motor consists of blade body, of platform, of fulcrum pin, of piece with disk and of at least one stop tongue. The disk of the piece with its one side is positioned on the platform and with its another side rests on a wall of the case directly or by means of a bushing. The piece is stationary in rotation relative to axis of the fulcrum pin. Each stop tongue is rigidly tied with the disk and interacts with a complementary surface corresponding to a flat made on the platform. The fulcrum pin consists of a ring-like yoke forming a bearing; in the disk of the piece there is made the central orifice large enough to ensure piece passing along the fulcrum pin. Another invention of the group refers to the gas-turbine motor containing at least a row of stator blades with alternate angle of assembly; the blades are installed in the case and are equipped with the above said piece interacting with a bushing positioned in a seat of the case. One more invention refers to the procedure for repair of the blade with alternate angle of assembly, platform of which has a worn part caused by friction with installed bushing. The procedure consists in mechanical treatment of this worn out part of the platform and in adding a piece to form the above said blade.

EFFECT: simplified repair of gas-turbine motor blades with worn by friction platforms; elimination of new blades wear.

8 cl, 14 dwg