DEVICE FOR FIXING RING SECTORS AROUND TURBINE SHAFT OF TURBINE MACHINE, TURBINE MACHINE, RING SECTOR AND TURBINE OF TURBINE MACHINE Russian patent published in 2010 - IPC F01D11/12 

FIELD: machine building.

SUBSTANCE: device for fixing ring sectors around turbine shaft of turbine wheel in turbine machine, in which each sector of the ring contains cone-shaped wall having the unit made of abrasion material, fixed on inner surface containing the circular flange on its upstream end. Circular flange is inserted in inner radial annular groove of annular guide of casing and maintained in radial position in this groove with annular fixing element of C-shaped section inserted in axial direction above the casing guide and annular flanges of ring sectors. Each sector of the ring includes the support part on downstream end, which is installed and fixed on cone-shaped wall and on the unit from abrasion material of ring sector. Support part is provided with possibility of supporting in axial direction on fixed element of the turbine so that the release of the wall flange from fixing element can be prevented. Axial gap between support part and fixed element is smaller than axial length of wall flange along fixing element. Other inventions of the group refer to turbine machine and turbine of turbine machine, which contain the above fixing device of ring sectors. One more invention of the group refers to the ring sector for turbine of turbine machine, which includes cone-shaped wall with the unit from abrasion material fixed on its inner surface. Cone-shaped wall contains on its upstream end the flange to be attached to the casing, and on downstream end the support detail which is supporting in axial and radial direction and which is installed and fixed on the wall and unit from abrasion material of ring sector.

EFFECT: inventions allow increasing reliability of the fixing device owing to excluding the possibility of detachment of ring sectors.

11 cl