STAGE OF AXIAL TURBINE Russian patent published in 1995 - IPC

FIELD: turbine engineering. SUBSTANCE: stage of axial turbine has working wheel 1 with band 2 and diaphragm 3. Ridges 5 of the above-band sealing are mounted in the outer rim 4 of the diaphragm. Two ridges 5 adjacent to inlet edge 6 of band 2 define a ring slot 7 which is in communication with by-pass passageway 8 made in outer rim 4 and having the outlet in the stage. The outlet of slot 7 points in the direction of the inlet edge 6 of band 2 at a blunt angle. The width of slot 7 is determined by a relationship presented in the invention description. EFFECT: enhanced reliability. 2 dwg