TURBINE ROTOR, DEVICE AND METHOD TO PRODUCE IT Russian patent published in 2009 - IPC F01D5/22 F01D5/30 

FIELD: engines and pumps.

SUBSTANCE: turbine rotor comprises one or several rows of blades with root, airfoil portion and shroud shelf. The latter and root feature rhomboid shape. Shroud shelves of one row of blades make closed ring and, along rotor circumference, exceeds theoretical index pitch required, for shroud shelves to make said closed ring, by allowance value. Shroud shelf rhomboid sides oriented along rotor circumference are arranged at 90° to rotor lengthwise axis, minus angle of twist. Every blade of one row is arranged with shroud shelves and airfoil sections twisted along blade lengthwise angle at 90° to rotor lengthwise axis. Other invention of the set relates to method of producing turbine rotor that comprises fabricating blades with rhomboid shroud shelves. Rhomboid sides that pass along rotor circumference are arranged at 90° to rotor lengthwise axis, minus angle of twist. Every blade fitted into the slot, its shroud shelves and airfoil sections twisted along blade lengthwise angle at 90° to rotor lengthwise axis. Twisting force is exerted on shroud shelves with form closure and maintained unless the last blade on the row is fitted in its place. One more invention of the set relates to appliance intended for fabricating turbine rotor and comprising a clip with two walls to limit lengthwise slot and to embrace shroud shelves of two adjacent blades at their centers. One of said two walls, right across said lengthwise slot, has two inner-thread holes receiving coupling screw to be fitted opposite one of shroud shelves.

EFFECT: smaller chances of blade damage, ease of mounting.

12 cl, 15 dwg