TURBINE WITH DEVICE PREVENTING SHROUD SEALING SLIPPAGE Russian patent published in 2017 - IPC F01D11/00 F01D5/06 

FIELD: machine engineering.

SUBSTANCE: turbine comprises of a couple of neighboring rotary discs which form an annular gap between them and have respective opposite slots for a sealing band that are aligned around the annular gap, and of a sealing band placed in the opposite slots to seal the annular gap. There is one through opening in one of the discs. It runs to said slot designed for the sealing band. There is a contact element extending sideways against the through opening and perpendicular to said longitudinal opening axis. A pin runs in the through opening and located inside the slot for the sealing band. The pin goes through a recess in said sealing band to prevent the sealing band from slipping around at least one disc. The pin consists of an interacting element which runs sideways and coupled with the contact element designed for contact interaction to fix the pin in the recess of the sealing band. The recess of the sealing band includes a notch on the edge of the sealing band, and the pin has a radial inner end in the notch of the sealing band.

EFFECT: invention allows avoiding slippage of the sealing band in the disc slot around the turbine disc.

7 cl, 8 dwg