ARRANGEMENT FOR SECURING A FUNCTIONAL POSITION OF A SHROUD PLATE ARRANGED ON A ROTOR DISC RELATIVE TO A MOVING BLADE ARRANGED ON THE ROTOR DISC

摘要

The invention relates to an arrangement (12) for securing a functional position of a shroud plate (2) of a rotor, which shroud plate is arranged on an outer circumference of a rotor disc of the rotor of a gas turbine, relative to a moving blade (1) of the rotor, which moving blade is arranged on the outer circumference of the rotor disc, wherein a channel portion (27) of an annular cooling channel is formed between the shroud plate (2) in the functional position thereof and a side (3), facing the shroud plate, of a blade root (4) of the moving blade, comprising a web (5) which can be arranged on the side (3) of the blade root that faces the shroud plate and which can be arranged on the blade root (4) in such a way that, with the moving blade arranged on the rotor disc, the web (5) extends radially with respect to the rotor disc; a guide portion (22) which can be formed by a thickened portion (21) formed on the shroud plate; and a guide opening (24) which can be formed by a through-bore (23) arranged on the shroud plate, wherein the guide portion at least partially surrounds the guide opening; a securing bolt (11) which has a longitudinal through-bore and of which the outside diameter (ds) corresponds to the inside diameter of the guide opening (24) and which has, on one end, two cutouts (14, 15) which are arranged diametrically with respect one another, are open to this end and are formed with equal widths, which cutouts extend from this end of the securing bolt (11) parallel to the longitudinal axis (L) of the securing bolt over part of the length of the securing bolt, wherein the width (ba) of the cutouts is greater than or equal to the width (bs) of the web (5); and a securing device for securing a functional position of the securing bolt (11) on the shroud plate (2) and the moving blade (1).