Gas seal for turbine blade tip

Details Gas seal for turbine blade tip Gas seal for turbine blade tip

1978-11-27

1980-11-11

Powell, Jr., Everette A.

Rotary kinetic fluid motors or pumps

Bearing, seal, or liner between runner portion and static part

Means to seal radial flow pump runner inlet from outlet

416228R, 416241R, F01D 1108

Patent

active

042329957

ABSTRACT:
An improved gas seal between a stationary member and a movable member, one of which includes an abrasive tipped projection directed toward a surface of the other, for example a turbine engine blade and a cooperating shroud member, is provided through an improvement in the abrasive tip. Such improved tip of the projection is a composite of inner and outer tip portions, the inner portion comprising an alloy resistant to oxidation, sulfidation and thermal fatigue at operating temperatures and the outer tip portion comprising a matrix entrapping a plurality of abrasive particles which protrude from the matrix toward the surface of the other member. The inner tip portion is bonded with the metallic body of the projection and the outer tip portion is deposited on the inner tip portion.

REFERENCES:
patent: 2820746 (1958-01-01), Keeleric
patent: 3199836 (1965-08-01), Moyer
patent: 3339933 (1967-09-01), Foster
patent: 3841805 (1974-10-01), Zalis
patent: 3854842 (1974-12-01), Caudill
patent: 3957593 (1976-05-01), Haach
patent: 4148494 (1979-04-01), Zelahy et al.

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