Method for reconditioning a rotor of a turbomachine

A method for reconditioning a turbomachine rotor (10), which is equipped with circumferentially extending rotor grooves (12) for accommodating rotor blades (13) which are retained in the rotor grooves (12) at a distance from each other by spacers (14, 15), the method comprising:

• a) removing the rotor blades (13) and spacers (14, 15) from the rotor grooves (12) which are to be reworked;
• b) hollowing out the exposed rotor grooves (12), simultaneously widening the rotor grooves (12) in order to remove damage-inflicted material;
• c) introducing at least one circumferentially extending lateral groove (21) for accommodating a filler piece (22, 23) in the rotor grooves (12) such that a gap (S) between rotor blades (13) and hollowed-out rotor grooves (12) is filled out by the filler piece (22, 23);
• d) providing new spacers (14′, 14″, 15′, 15″) which are matched to the hollowed-out rotor grooves (12) and have recesses (17) which are matched to the introduced lateral grooves (21);
• e) providing filler pieces (22, 23) for inserting into the circumferentially extending lateral grooves (21) and recesses (17) of the new spacers (14′, 14″, 15′, 15″);
• and
• f) inserting the rotor blades (13) and new spacers (14′, 14″, 15′, 15″) into the hollowed-out rotor grooves (12) and inserting corresponding filler pieces (22, 23) into the lateral grooves (21) and matched recesses (17) of the new spacers (14′, 14″, 15′, 15″).