TURBINE BLADE SECURING FOR TURBINE MACHINE Russian patent published in 2015 - IPC F01D5/30 

FIELD: machine building.

SUBSTANCE: turbine blade securing contains a groove for the blade and blade shank located in the groove. The blade shank has tip of the blade shank at side of the ring towards axis of rotation of the rotor. The blade shank contains securing teeth for insertion in the appropriate grooves in the rotor, at that teeth are located one after another along the line towards the blade shank tip, and their height increases towards the said tip. The securing teeth have the tooth tip, and shank of the turbine blade between the securing teeth has bottom land of the securing teeth. The securing tooth has side surface between the bottom land of the securing teeth and tip of the securing tooth. Between the side surface and appropriate carrying side surface in the groove for the blade a clearance of the carrying side surface is made. The clearance of the carrying side surface on the securing tooth that is close to the blade shank tip, in principle is equal to zero, and clearances of the carrying side surface between the other side surface and appropriate carrying side surfaces increase towards the blade body.

EFFECT: invention increases reliability of the turbine blade securing.

13 cl, 2 dwg