Seal for a joint or juncture – Seal between relatively movable parts – Relatively rotatable radially extending sealing face member
Patent
1976-08-18
1977-12-20
Smith, Robert I.
Seal for a joint or juncture
Seal between relatively movable parts
Relatively rotatable radially extending sealing face member
415174, F16J 1532
Patent
active
040637425
ABSTRACT:
An abradable fluid seal for use in the space between two relatively movable members, such as the space between the cylindrical path of the rotating blade tips in an aircraft gas turbine and the surrounding stationary casing of the turbine. The preferred seal uses a series of thin narrow elongate metal strips. These are assembled and secured in side-by-side relationship to form a flexible integrated assembly having, in the direction of its thickness, an outer base portion and an inner seal portion. Each strip has corresponding base and seal portions and, over a given length, a corresponding succession of undulations in each portion. The undulations in the base portion are three flatsided semi-hexagonal figures, each having, between its two slanted sides, a flat crest which is bonded to the corresponding flat crest of a semi-hexagonal figure in an immediately adjacent strip so that said figures cooperate to form an integral honeycomb, the voids of which extend in the direction of the assembly's thickness dimension. The undulations in the seal portion of each strip are spaced across the width of the assembly from the corresponding undulations in each immediately adjacent strip so as to cooperate therewith to form therebetween a free undulating passageway, extending lengthwise of the assembly's seal portion. Each alternate strip has its corresponding seal and base portion undulations pointing in the same direction. Each interposed strip has its corresponding seal and base portion undulations pointing in opposite directions.
REFERENCES:
patent: 3291382 (1966-12-01), Blackhurst et al.
Kentucky Metals, Inc.
Robert Arthur F.
Smith Robert I.
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