Title: Locking device for the rotor blades of a flow machine

• Summary
• Claims
• Description
• View all

Abstract: A rotor of a flow machine has a circumferentially extending slot with laterally projecting flanks. A plurality of rotor blades have roots radially locked in the circumferential slot. The rotor blades have pedestals substantially level with the surface of the rotor, and the blade roots or feet are circumferentially slidable in the circumferential slot. The circumferential slot has a blade stacking hole for inserting the blade roots into the slot. A locking device is positioned between the roots of a pair of blade elements. The locking device has a lock foot shaped to engage the sides of the adjacent blade roots. The sleeve is radially movable with the lock foot and rotatable about its own axis. The lock foot is not rotatable. The sleeve has a pair of outwardly extending tangs. A coil spring extends between the bottom of the circumferential slot and the sleeve to urge the sleeve and the lock foot radially outwardly. The tangs, in one angular position of the sleeve engage slots in the undersides of the adjacent pedestals of the pair of blades. In the other angular position the tangs engage a slot formed between the abutting edges of the pedestals of a pair of blades. When the tangs engage the slots at the underside of the pedestals, the locking foot is positioned so that it may be moved circumferentially in the circumferential slot. When the tangs engage a slot between the abutting edges of the pedestals, the lock foot is positioned between the laterally projecting flanks of the circumferential slot and radially with respect to the rotor whereby the locking device cannot be moved circumferentially.


Do you think this is a good invention? Vote now: