Moving blade removing device and moving blade removal method

A rotor blade removal method for removal of a rotor blade from a disk, the disk including an outer peripheral surface that extends in a circumferential direction around an axis, a first end surface that faces a first axial side which is one of two sides in an axial direction in which the axis extends, a second end surface that faces a second axial side opposite to the first axial side, and a blade root groove, the first end surface extending toward a radial inner side with respect to the axis from an edge of the outer peripheral surface that is on the first axial side, the second end surface extending toward the radial inner side from an edge of the outer peripheral surface that is on the second axial side, the blade root groove being recessed toward the radial inner side from the outer peripheral surface and extending from the second end surface in a groove penetration direction twisted with respect to the axial direction to penetrate to the first end surface, the rotor blade including a blade body of which a cross-sectional shape perpendicular to a radial direction with respect to the axis is a blade-like shape and that extends in the radial direction and a blade root that is provided on the radial inner side with respect to the blade body and that is fitted to the blade root groove, the rotor blade removal method comprising:

• executing a preparation step of preparing a rotor blade removing device;
• executing a device alignment step of disposing the rotor blade removing device on the disk;
• and
• executing a rotor blade moving step of operating the rotor blade removing device such that the rotor blade attached to the disk is moved,
• wherein the rotor blade removing device prepared in the preparation step includes
• a pushing-out mechanism, and
• a frame to which the pushing-out mechanism is attached,
• the pushing-out mechanism includes a contact end that can come into contact with the rotor blade and an actuator that moves the contact end in a movement direction,
• the frame includes
• a base that extends in the movement direction,
• a reaction force receiving portion that extends toward a first height side, which is one of two sides in a height direction different from the movement direction, from a first base end portion, which is an end portion of the base that is on a first movement side which is one of two sides in the movement direction, and
• a pressing receiving portion that is provided on a second base end portion, which is an end portion of the base that is on a second movement side opposite to the first movement side,
• the base includes an outer peripheral contact surface that faces the first height side and that can come into contact with the outer peripheral surface,
• the reaction force receiving portion extends toward the first height side from an end of the outer peripheral contact surface that is on the first movement side and includes an end contact surface that faces the second movement side and that can come into contact with the first end surface,
• the pressing receiving portion includes a mechanism contact surface that faces the first movement side and that can come into contact with a mechanism end surface that faces the second movement side at the actuator,
• the rotor blade removing device further includes one or more spacers that can be disposed between the rotor blade and the contact end in the movement direction,
• in the device alignment step, the movement direction of the contact end is made parallel to the groove penetration direction, the outer peripheral contact surface of the base is brought into contact with the outer peripheral surface, the end contact surface of the reaction force receiving portion is brought into contact with the first end surface, the contact end is disposed on the second movement side with respect to the rotor blade, and the contact end and the rotor blade are caused to face each other in the movement direction, and
• in the rotor blade moving step, the actuator is driven such that the contact end is moved to the first movement side and the rotor blade is moved to the first movement side.