Method for regulation of the temperature in the end areas of...

D - Textiles – Paper – 21 – G

Patent

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Details

D21G 1/02 (2006.01) F16C 13/00 (2006.01)

Patent

CA 2208065

The invention concerns a method for regulation of the temperature in the end areas of the roll mantle of a variable-crown roll provided with glide bearings and/or for compensating for an error in the diameter of the roll arising from thermal expansion. The roll mantle (12) of the roll (10) is supported adjustably on the roll axle (11) by means of hydraulic loading elements (17, 17a) loaded by means of a pressure medium and acting upon the inner face of the roll mantle (12) at least in the direction of the nip plane. Further, the roll mantle (12) is supported on the roll axle (11) by means of hydraulic glide-bearing elements (14, 14a, 15, 16) loaded by means of a pressure medium and fitted in the areas of the ends of the roll mantle. In the method, into the end areas of the roll (10), a pressure medium is supplied, whose temperature and/or flow is/are regulated so as to keep the temperature in the end areas of the roll mantle (12) at the desired level, substantially at the same level as the temperature in the middle area of the roll (10).

L'invention se rapporte à un procédé de régulation de la température des zones terminales de l'enveloppe d'un rouleau à couronne variable pourvu de paliers coulissants et/ou à un procédé de compensation d'erreur dans le diamètre du rouleau, erreur due à la dilatation thermique. L'enveloppe (12) du rouleau (10) est supportée de manière réglable sur l'axe (11) du rouleau au moyen d'éléments de chargement hydrauliques (17, 17a) chargés par un milieu de pression et agissant sur la face interne de l'enveloppe (12) du rouleau, au moins dans le sens du plan de la ligne de pincement. L'enveloppe (12) du rouleau est également supportée sur l'axe (11) au moyen d'éléments de paliers coulissants hydrauliques (14, 14a, 15, 16) chargés par un milieu de pression et montés dans les zones terminales de l'enveloppe du rouleau. Selon le procédé, un milieu de pression est amené dans les zones terminales du rouleau (10), et la température et/ou le flux de celui-ci est/sont régulé(s) de façon à maintenir la température des zones terminales de l'enveloppe (12) du rouleau au niveau désiré, pratiquement au même niveau que la température de la zone centrale du rouleau (10).

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