REGULATION OF GAPS AT TURBOMACHINE BLADE TIPS Russian patent published in 2014 - IPC F01D11/24 

FIELD: machine building.

SUBSTANCE: turbomachine comprises units to regulate the gaps between the tips of the high-pressure turbine moving blades (16) and the outer casing (12) set around the said blades, units (48, 46) to cool the outer casing by the air taken from the high-pressure compressor of the turbomachine, the first units (60) for electric heating of the upper part of the outer casing (12) and second units for electric heating of the lower part of the outer casing (12), pulse control units (63) for air cooling units (48, 61, 46) and independent control units for electric heating units (60).

EFFECT: independent operation of the units for electric heating of upper and lower parts of the casing helps to solve the problem of hot restart of a turbomachine, herewith heating of only lower part of the outer casing is controlled, hot air withdrawal line is eliminated, simplified design.

12 cl, 5 dwg