TURBINE NOZZLE ASSEMBLY Russian patent published in 2012 - IPC F01D25/24 F01D3/02 F01D9/02 

FIELD: machine building.

SUBSTANCE: turbine nozzle assembly includes blade with internal and external side walls, external ring and flow divider with horizontal elongation. Boundary of transition between external ring and external side wall has enveloped/enveloping transition boundary or radial locking mechanism. Boundary of transition between horizontal elongation and internal side wall has radial locking mechanism or enveloped/enveloping transition boundary. Radial locking mechanism includes an enveloped step projecting along the axis out of the side wall and provided with a flange on its radial side in the form of the second enveloped step projecting along the axis to side wall. Enveloped/enveloping transition boundary includes radial enveloping groove on side wall and mating radial enveloped step. Where the enveloped/enveloping transition boundary is located on rear edge of side wall, it is connected by means of a butt weld located throughout the length of enveloped/enveloping transition boundary. Axial length of enveloped/enveloping transition boundary is approximately less than 1/4 of axial length of alignment between side wall and external ring or horizontal elongation.

EFFECT: inventions allow reducing the distortion of steam flow trajectory in turbine and simplifying its assembly.

32 cl, 7 dwg