Sealing arrangement for air preheater

Details Sealing arrangement for air preheater Sealing arrangement for air preheater

1987-04-03

1988-12-20

Davis, Jr., Albert W.

Heat exchange

Regenerator

Checker brick structure

277 81R, F28D 1904

Patent

active

047919809

ABSTRACT:
A sealing arrangement for an air preheater for a fuel burning device includes both radial and circumferential seals. The radial seals include a set of flexible, foil-like metal sealing strips coupled to semi-rigid radial seal plates. The semi-rigid radial seal plates, in turn, are coupled to diaphragm members which divide a generally cylindrical drum of the air preheater into sectors, each sector containing a set of heat exchanger elements, such as parallel plates or fins. To effect sealing, the foil-like metal radial sealing strips will engage and wipe across sector plates on a housing surrounding the drum. The radial sealing strips are completely unobstructed from cantilevered yielding movement in a trailing direction to the full extent that the flexure characteristics of the radial sealing strips themselves permit. the circumferential sealing strips are also constructed of a flexible, thin, foil-like metal material. These circumferential strips are coupled to circumferential seal plates which, in turn, are connected to the drum of the air preheater adjacent the outer circumferential edges of the drum. The circumferential sealing strips yieldingly engage annular surfaces of the housing surrounding the drum to effect sealing between the drum and the housing. Each circumferential sealing strip includes a sharp bend adjacent its free distal edge to direct the free distal edge toward engagement with an annular sealing surface of the housing.

REFERENCES:
patent: 1746598 (1930-02-01), Ljungstrom
patent: 2549583 (1951-04-01), Eckersley

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