FIELD: turbomachines. SUBSTANCE: rotor blades have their roots installed in circular slot of rotor. Pinned blade having same configuration as remaining ones is held in position by means of hold-down and locking inserts mounted in transverse slot. Hold-down insert and transverse slot are shaped so that the former can move in the latter only lengthwise thereby preventing its escape from slot under centrifugal forces set up in pinned blade while rotor is revolving. Hold-down insert is installed through circular slot and locking insert is placed in transverse slot at its end wall and is locked by means of pins. EFFECT: improved reliability of joint, facilitated assembly and disassembly procedures. 4 dwg
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