Linear scan hot spot detection system

F - Mech Eng,Light,Heat,Weapons – 28 – F

Patent

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F28F 27/00 (2006.01) F28D 19/04 (2006.01)

Patent

CA 2260193

A rotary regenerative air preheater (10) having a linear scan hot spot detection system (38). This linear scan hot spot detection system (38) has a linear rail assembly (44) generally extending from the center to the periphery of the rotor (14) cavity. The rail assembly (44) preferably supports two carriage assemblies (54) for linear motion thereon. A drive mechanism (58) located on the exterior wall of the air preheater (10) shuttles the carriages (54) between the central portion and the peripheral portion of the rotor (14) cavity. Each carriage assembly (54) supports a single infrared sensor assembly head (66) for detecting hot spots on the air preheater rotor (14). The linear reciprocating motion of the two carriages (54) results in complete detection coverage for the rotating air preheater rotor (14).

L'invention porte sur un préréchauffeur rotatif d'air (10) présentant un système de détection (38) de points chauds, à balayage linéaire. Ledit système de détection (38) des points chauds comporte un système linéaire de rails (44) s'étendant sensiblement depuis le centre de la cavité du rotor (14) jusqu'à sa périphérie. Le système de rails (44) porte normalement deux chariots (54) se déplaçant de manière linéaire sur celui-ci. Un mécanisme d'entraînement (58) placé sur la paroi extérieure du préréchauffeur (10) entraîne le va-et-vient des chariots (54) entre le centre et la périphérie de la cavité du rotor (14). Chacun des chariots (54) porte une seule tête de détection (66) par IR permettant de détecter les points chauds sur le rotor du préréchauffeur (14). Le mouvement alternatif linéaire des deux chariots (54) permet une couverture complète de détection dans le rotor du préréchauffeur (14).

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