Device for securing rotor blades to a rotor, especially of a gas

Details Device for securing rotor blades to a rotor, especially of a gas Device for securing rotor blades to a rotor, especially of a gas

1996-05-03

1998-03-17

Kwon, John T.

Fluid reaction surfaces (i.e., impellers)

Specific working member mount

Blade received in well or slot

416221, F01D 518

Patent

active

057279276

ABSTRACT:
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.

REFERENCES:
patent: 2753149 (1956-07-01), Kurti
patent: 2971744 (1961-02-01), Szydlowski
patent: 2980395 (1961-04-01), Rubbra et al.
patent: 3395891 (1968-08-01), Burge et al.
patent: 3666376 (1972-05-01), Damlis
patent: 4191509 (1980-03-01), Leonardi
patent: 4505640 (1985-03-01), Hsing et al.

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