DEVICE FOR FASTENING BLADES OF ROTOR WHEELS OF AXIAL-FLOW TURBOMACHINE Russian patent published in 2008 - IPC F01D5/30 

FIELD: mechanical engineering; turbomachines.

SUBSTANCE: proposed device for fastening blades of rotor wheel of axial-flow turbomachine has disk, blades sealing ring, U-shaped split ring and lock. Blades are installed in longitudinal slots of disk by their roots provided with radial-axial catches. Sealing ring is installed on disk with thrusting by outer radial bead both against rim part of disk and against roots of blades. Outer radial bead of sealing ring is fitted in catches of blade roots. Sealing ring engages through inner radial bead with bead of disk radially pointed to longitudinal axis. Beads of sealing ring and disk are mated through cylindrical bodies and enclosed by U-shaped ring with radial cut communicating with slot. U-shaped ring engages with lock made in form of part of C-shaped ring arranged between disk and U-shaped split ring. Projection made on side surface of said radial bead of sealing ring pointed to disk is fitted in additional slot of radial bead of disk and slot of U-shaped split ring which are registered. Projection of sealing ring and cylindrical surfaces of U-shaped split ring are enclosed by lock.

EFFECT: provision of reliable locking of blades turbomachine operating at high temperature, centrifugal and gas dynamic loads, increased strength of construction and facilitated assembling and disassembling.

4 cl, 22 dwg