Ramp surface for Leitschaufeldeck- and blade base

An inventive guide vane segment 10 for a turbomachine includes a radially inner cover plate 13 with a cover plate surface 14 that is adapted to be positioned 20 facing in the turbomachine an adjacent the vane segment blade and to extend along a conical surface K A rotor blade according to the invention 20 for a fluid machine has, in a radially inner region of a base plate 23 with a base surface 24 which is adapted in the turbomachine a shroud of the moving blade adjacent row of guide vanes 10 to be positioned facing and substantially there along a conical surface K