Device for setting the gap dimension for a turbomachine

A device for setting the gap dimension for a turbomachine, in particular a gas turbine, with

• a multiplicity of moving blades arranged in at least one moving-blade row of a rotor arrangement,
• a guide-vane carrier surrounding the rotor arrangement and a turbine casing surrounding the guide-vane carrier,
• a multiplicity of heat accumulation segments which are arranged on the guide-vane carrier of the rotor arrangement and at least opposite the moving-blade tips and which, together with the moving-blade tips, enclose a gap, and
• with at least one drive means which projects radially through the turbine casing and the guide-vane carrier and is operatively connected kinematically to at least one heat accumulation segment and which, when actuated, causes a radial spacing of the heat accumulation segment,
• wherein the heat accumulation segment has, in the flow direction of the turbomachine, a conical contour facing the rotor arrangement and is arranged so as to be displaceable parallel to the flow direction, and wherein the drive means is connected to the heat accumulation segment directly or via eccentric unit, in such a way that, when the drive means is actuated, the heat accumulation segment is displaced, with the result that a radial spacing between the heat accumulation segment and the moving-blade tips can be set, wherein the drive means is connected to an overload unit which in the event of force-induced contact between the heat accumulation segment and at least one moving-blade tip, allows a radial spacing of the heat accumulation segment.