System of rolls in a supercalender

Details System of rolls in a supercalender System of rolls in a supercalender

D - Textiles, Paper

21

G

92/4

D21G 1/00 (2006.01)

Patent

CA 1313787

Abstract The invention concerns a system of rolls in a supercalender, comprising a variable-crown upper roll adjustable in zones, a variable-crown lower roll adjustable in zones, several intermediate rolls placed between the upper roll and the lower roll, as well as a hydraulic control system for the system of rolls. The upper roll is a stationary variable-crown roll, whose roll mantle is supported on the roll shaft by means of hydrostatic loading elements acting in the direction of compression and by means of end bearings placed at the ends of the roll mantle, said bearings preventing displacement of the mantle ends in the radial direction relative the shaft of the upper roll. The lower roll is a floating variable-crown roll, whose roll mantle is supported on the roll shaft adjustably in the direction of compression by means of hydrostatic loading elements. According to the invention, the system of rolls is provided with position detectors provided at the ends of the shaft of at least one roll, whereat the control system of the system of rolls is arranged, on the basis of the measurement impulses received by it from the position detectors and from the hydrostatic loading elements of at least the lower roll, to regulate the positions of the rolls in the system of rolls and to balance the forces effective in the system of rolls based on the measurement of position.

585481

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