Blade sealing and retaining means

Details Blade sealing and retaining means Blade sealing and retaining means

1974-03-21

1976-02-03

Raduazo, Henry F.

Rotary kinetic fluid motors or pumps

With diversely oriented inlet or additional inlet for...

416 97R, F04D 3100, F01D 500

Patent

active

039362167

ABSTRACT:
An engine is shown having means for providing cooling fluid to turbine blades on a disk while providing sealing means between the blade roots and cooperating disk slots and providing means for retaining the turbine blades on their disk. The device comprises a full ring coverplate which engages a small coverplate fixed to each blade. A small coverplate is fixed, such as by bonding, to the forward end of the root section of each blade and contoured so that it extends over the edges of the root and bears against the forward side of the disk when the blade root has been inserted in a blade slot. The blades are held in the disk by the full ring coverplate which engages all of the small coverplates at a midpoint between the inner and outer ends of the root. The position of the full ring coverplate can be adjusted to provide and vary a biasing force against the small coverplates to maintain a force keeping the small coverplates against the disk. Cooling air is injected at the inner diameter of the full ring coverplate and is directed to a hole in each of the small coverplates which permits the cooling air to enter the inside of the hollow blade. The full ring coverplate also acts as a forward disk seal.

REFERENCES:
patent: 3501249 (1970-03-01), Scalzo et al.
patent: 3572966 (1971-03-01), Borden et al.
patent: 3644058 (1972-02-01), Barnabel et al.

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