Patent ID: 9657641
Date: 2017-05-23
CPC Classifications: F01D,F02C

Claim:
1. A fluid flow machine penetrated axially by a hot gas stream, the fluid flow machine comprising: a rotor shaft; rows of rotor blades, each rotor blade having a base segment attached to the rotor shaft, a base plate radially outward of the base segment, and an airfoil extending radially outward of the base plate, wherein adjacent rotor blades in a respective row define therebetween a first gap; rows of guide vanes on a housing side, the guide vanes being arranged respectively axially between successive rows of rotor blades; heat shield segments attached to the rotor shaft opposite ends of the guide vanes, the heat shield segments being located between the base segments, wherein a second gap is defined between respective ones of the heat shield segments and respective ones of the adjacent base segments; wherein first cooling air chambers are formed along the rotor shaft inside the heat shield segments and base segments, the first cooling air chambers communicating with each other and with a cooling air source; wherein second cooling air chambers are arranged radially outward of the first cooling air chambers inside the base plates between the rotor blades; wherein each of the base plates defines, along a side surface thereof, a first axial groove and a second oblique groove, the second oblique groove being oblique to a radial plane of the rotor shaft; and wherein a first sealing band is inserted in the first axial groove and a second sealing band is inserted in the second oblique groove in a radially inwardly oriented position, such that the second cooling air chambers are able to be vented into the hot gas stream exclusively at their ends situated upstream with respect to the direction of the hot gas stream.