Controlling seal system in rotary regenerative air preheaters

Details Controlling seal system in rotary regenerative air preheaters Controlling seal system in rotary regenerative air preheaters

1986-02-19

1988-08-02

Davis, Jr., Albert W.

Heat exchange

Regenerator

165 9, F28D 1704

Patent

active

047608757

ABSTRACT:
Control of the seal of a rotary regenerative air preheater is provided by a plurality of inductance sensors (S1-S8) arranged around the path of travel of seal parts borne by the rotating part of the preheater. When these are sealing frames borne on hoods of a stationary matrix type preheater (12) drive means such as magnetic actuators (5) are fed power signals through slip rings (4). When they are seal strips on a rotating matrix type, the drive means are mounted on the sector plates of the stationary body. A control circuit compares the signals received sequentially from the sensors and drives appropriate one or ones of the drive means to bring the sealing means to a predetermined axial relationship, or to hold them there. The sensors may be paired with comparison sensors in the same environment whereby to reduce errors due to changes in temperature etc.

REFERENCES:
patent: 3232335 (1966-02-01), Kalbfleisch
patent: 3999597 (1976-12-01), Sato
patent: 4058158 (1977-11-01), Blom et al.
patent: 4301858 (1981-11-01), Mock
patent: 4306612 (1981-12-01), Baker et al.

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