Controlled profile drying hood

Details Controlled profile drying hood Controlled profile drying hood

D - Textiles, Paper

21

F

D21F 5/00 (2006.01) D21F 5/04 (2006.01)

Patent

CA 2160748

Apparatus is disclosed to control a Yankee hood profile along the cylinder wrap so as to provide a structurally stable hood having controlled impingement distances at operating temperatures. Radial support of the hot hood internals are located at or near the extremities of the hood wrap and the internal profile along the cylinder wrap is on an adjusted cold shape so that the profile is even when operating temperatures are reached. Thus, the hood is "deformed" (not pre- strained) when cold but, when the operating temperature is reached, it assumes the desired configuration.

Dispositif permettant de stabiliser le profil d'un sécheur Yankee à hotte le long de l'enveloppe d'un cylindre, de manière à ce que la hotte soit structurellement stable et présente des distances d'impact prévisibles lorsqu'elle atteint des températures d'exploitation. Les appuis radiaux des organes internes de la hotte chaude se trouvent sur ou près des extrémités de l'enveloppe de la hotte, tandis que le profil interne le long de l'enveloppe du cylindre se trouve sur un cadre ajusté à froid, de sorte que le profil de la hotte est uniforme lorsque les températures d'exploitation sont atteintes. Ainsi, la hotte est «déformée» (et non précontrainte) lorsqu'elle est froide, mais, une fois qu'elle a atteint la température d'exploitation, elle prend la forme désirée.

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