초록 ▼

The blades of a turbine rotor are secured to a rotor disk by inserting the blade foot with its serrations into a respective serrated groove in the rim of the rotor disk, whereby serrations of blade foot side surfaces mesh with corresponding serrations in the side walls of the grooves in the rotor ri

The blades of a turbine rotor are secured to a rotor disk by inserting the blade foot with its serrations into a respective serrated groove in the rim of the rotor disk, whereby serrations of blade foot side surfaces mesh with corresponding serrations in the side walls of the grooves in the rotor rim to interlock the blade foot with the rotor disk in the radial direction. The axial locking of the blade foot in the groove is accomplished by a rivet connection having a rivet shaft positioned in a gap between the radially inwardly facing sole of the blade foot and the radially outwardly facing bottom of the groove. The rivet heads rest against washers or washer rings. If flat head rivets are used, these heads are received in countersunk recesses in the washers or washer rings that bear partially against the side surface of the rotor disk rim and partially against an axial end surface of the respective blade foot. A radial biasing of the rivet shaft intermediate the shaft ends may be employed to minimize or eliminate radial play between the intermeshing serrated foot and groove surfaces.

대표청구항 ▼

[ What is claimed is:] [1.] A device for securing a rotor blade having a blade foot with axial blade foot end faces and with a blade foot sole (5') in a blade mounting groove of a rotor disk having a rotor rim with axial rim side surfaces, said blade mounting groove having a groove bottom in said ro

[ What is claimed is:] [1.] A device for securing a rotor blade having a blade foot with axial blade foot end faces and with a blade foot sole (5') in a blade mounting groove of a rotor disk having a rotor rim with axial rim side surfaces, said blade mounting groove having a groove bottom in said rotor rim and groove side surfaces intermeshing with blade foot side surfaces, comprising a gap (S) with open ends in said blade mounting groove (6) between said foot sole (5') and said groove bottom (6'), a rivet (7) with a rivet shaft (7') in said gap (S), said rivet shaft comprising a first rivet head (8) at one end of said shaft, a second rivet head (9) at the other end of said rivet shaft (7'), and a washer member (10, 11, . . . ) between each rivet head and a respective axial rim side surface of said axial rim side surfaces, wherein two washer members forming a pair are so dimensioned that a rim facing washer surface bears partly against one of said axial rim side surfaces and partly against one of said axial end faces of a respective blade foot when a riveting operation is completed, wherein said first rivet head is a holding head (8) forming part of said rivet (7) prior to said riveting operation, wherein said second rivet head is a locking head (9) formed as part of said riveting operation, said rivet shaft (7') comprising a hollow end section (9') for forming said locking head (9) in said riveting operation, wherein at least one of said washer members comprises at least one integral element (15, 16; 18, 19, etc.) extending into said gap (S) for guiding, centering, and holding said rivet shaft (7'), and wherein said at least one washer member comprises two integral elements (15) extending into said gap (S) for guiding, centering, and holding said rivet shaft (7') disposed between said two integral elements (15) which, prior to insertion into said gap (S), are angularly deformed so that after insertion into the gap (S) and completion of said riveting operation, said integral elements (15) exert a radially effective biasing force (P) on said blade foot (5) to minimize play in surface contacts between said blade foot and said mounting groove (6).