REVERSING TURBINE STAGE Russian patent published in 2017 - IPC F01D1/30 F01D9/02 F01D11/08 

FIELD: machine engineering.

SUBSTANCE: reversing turbine stage contains a nozzle device, working blades, movable U-shaped screen installed above the blades with windows provided in its bottom. Inside the U-shaped screen above the working blades, there is a fixed T-shaped underrotor stator insert, which reduces leaks under the U-shaped screen. On the front side with respect to the direction of the gas flow, the side wall of the U-shaped screen is provided with an outer protrusion contacting the inner surface of the nozzle device outer wall in the extended position of the U-shaped screen corresponding to the operation of the reversing turbine reducing the leaks over the U-shaped screen.

EFFECT: elimination of ventilation losses in the reversing turbine from gas leaks above and under the U-shaped screen when reversing.

3 dwg