TURBINE STAGE OF TURBINE ENGINE AND TURBOMACHINE Russian patent published in 2017 - IPC F01D25/24 F01D9/04 

FIELD: machine engineering.

SUBSTANCE: turbine stage of the turbomachine comprises a stationary nozzle guide unit and a turbine wheel. The nozzle guide unit is suspended on a crankcase and is axially supported by a support on a split ring at the outlet which is mounted in the annular groove of the crankcase rail. The wheel is mounted inside a sectored ring located inside the crankcase. Each sector of the ring has a circular c-shaped member provided at its upstream end and fitted on the rail of the crankcase and radially holding the split ring in the groove. The inner wall of the c-shaped member of each sector of the ring radially extends inside the split ring over the whole axial dimension of the latter, and its upstream end section enters the groove of the nozzle guide unit. The circumferential edge radial to the inner wall of the c-shaped member of each sector of the ring has a cutout which interacts with complementary means of the nozzle guide unit to prevent rotation of the ring sector located opposite the nozzle guide unit. The nozzle guide unit at its downstream end has a radially outer annular lug having an outer cylindrical surface of a radial support on the crankcase rail and a downstream radial support surface on the split ring. The groove extends downstream of this radial downstream surface. The nozzle guide unit is divided into sectors, and the grooves are oriented along circumference, wherein their circumferential ends are faced to circumferential ends of the nozzle guide unit sectors or closed by side bridges of nozzle guide unit sectros. Another invention of the group relates to a turbomachine comprising said stage.

EFFECT: improved reliability of the turbine stage of the turbomachine.

6 cl, 12 dwg