Rotor section for a rotor of a turbomachine, and rotor blade for a turbomachine

A rotor section for the rotor of a turbomachine, comprising:

• a plurality of rotor blade retaining grooves disposed on an outer periphery of the rotor which extend in an axial direction of the rotor and in which a rotor blade is arranged in each case, the rotor blade including a blade root which corresponds to the rotor blade retaining groove;
• a plurality of radially inwardly pointing contact surfaces which are provided in each case on the rotor blades;
• and
• a plurality of plate-like sealing elements, wherein for the guiding of a cooling medium along a rotor surface on an end face, the plurality of plate-like sealing elements bear against the contact surface by centrifugal force action, wherein for securing the plurality of sealing elements against displacement in a circumferential direction at least one of the plurality of sealing elements includes an opening provided in the sealing element for accommodating a blocking element, wherein provision is made for a hole, which aligns with the opening, and for a positionally secured blocking element, which fits in the hole and in the opening, wherein the hole is arranged in the blade root, and in that the opening is of a keyhole-like design, and
• wherein the blocking element is of a bolt-like design including a cam which is arranged on an outer circumference of the blocking element, which cam may be rotated between the blade root and the sealing element.