Radial seal for air preheaters

Details Radial seal for air preheaters Radial seal for air preheaters

1996-04-01

1997-12-16

Cuchlinski, Jr., William A.

Seal for a joint or juncture

Seal between relatively movable parts

Relatively rotatable radially extending sealing face member

277152, 277236, 165 9, F16J 1532, F23L 1502

Patent

active

056976194

ABSTRACT:
A rotary regenerative air preheater having a rotor mounted to a central rotor post for rotation within a surrounding housing whereby heat absorbent material carried in the rotor is alternately exposed to a flow of heating gas and a gas to be heated. A radial seal assembly including a flexible sealing strip is mounted to the hot end edge of each radially extending partition of the rotor to establish a seal between the partitions and the confronting face of the sector plate of the housing as the rotor is rotated. The flexible sealing strip has a tapered configuration such that the distal edge of the sealing strip and the confronting face of the sector plate define a controlled radially extending gap when the air preheater is in a hot-operating condition. A protective tip is mounted on the distal edge of the flexible sealing strip to prevent premature failure due to edge fracturing. The rigid back support leaf biases the flexible sealing strip, pretensioning the flexible sealing strip to eliminate gapping due to gas-air pressure differentials.

REFERENCES:
patent: 2650074 (1953-08-01), Ballard
patent: 2670183 (1954-02-01), Hammond et al.
patent: 3166119 (1965-01-01), Bellows
patent: 4593750 (1986-06-01), Finnemore
patent: 4673026 (1987-06-01), Hagar et al.
patent: 4997028 (1991-03-01), Townsend
patent: 5005634 (1991-04-01), Reeves et al.

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