INSULATION OF CIRCULAR PROTRUDING EDGE OF EXTERNAL TURBOMACHINE CASING IN RESPECT TO RELEVANT ANNULAR SECTOR, TURBOMACHINE STAGE AND TURBOMACHINE Russian patent published in 2015 - IPC F01D25/24 F01D11/00 

FIELD: machine building.

SUBSTANCE: turbine stage comprises a rotor disk mounted inside a ring divided into sectors and held by the external casing. Every annular sector comprises a rear edge with an annular groove confined by the front circular stop member, the rear circular stop member and the bottom wall. The external casing comprises a circular protruding edge located in the said groove to fix the rear edge of the annular sector. The bottom wall of the annular sector's annular groove is shifted in the radial direction in respect to the circular protruding edge of the external casing and can form insulating heat space in-between. The bottom wall of the annular groove comprises units for radial setting on the circular protruding edge which are formed by two contact patch pieces protruding over the bottom wall of the annular groove. The other invention of the group refers to a turbomachine comprising the above turbine stage.

EFFECT: group of inventions allows for higher reliability of a turbine stage.

9 cl, 6 dwg