LOW-PRESSURE TURBINE Russian patent published in 2014 - IPC F01D11/08 

FIELD: machine building.

SUBSTANCE: low-pressure turbine incorporates sector split ring fitted on the housing inner side. Said ring has sealing cellular insert arranged on turbine working blade top shroud side. Said split ring is made of equal-depth sheet material. Ring gas flow downstream front and rear ends are plied-up while central part of the ring with cellular insert is a monolayer design. Ring front end the rib directed to turbine axis. Said rib is fitted in mid ring groove, said mid ring being fitted between housing radial flanges, front and rear downstream of gas flow.

EFFECT: higher reliability.

4 dwg