Glide-shoe arrangement for a variable-crown roll

B - Operations – Transporting – 21 – F

Patent

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92/21.5

B21F 27/00 (2006.01) D21F 3/00 (2006.01) D21G 1/02 (2006.01) F16C 13/00 (2006.01)

Patent

CA 1306893

ABSTRACT OF THE DISCLOSURE A glide shoe arrangement for a variable crown roll is disclosed. The roll comprises a fixed central axle on which a hollow cylindrical roll mantle is rotatably journalled. A series of piston-glide shoe arrangements are fitted along the length of the roll between the axle and the inner surface of the roll mantle and are adapted to be loaded by hydraulic pressure fluid so that each piston loads a corresponding glide shoe against the inner surface of the roll mantle to control the distribution of nip pressure in a nip formed by the variable crown roll and a counter roll. The piston-glide shoe arrangements are fitted in cylinder bores formed in the axle. spherical surface bearings are fitted between the loading pistons and the glide shoes, the center of curvature or rotation of the bearing surfaces being located on the side of the slide shoe. A pin- shaped projection is fitted in the loading piston and extends through the spherical bearing. A sealing articulation arrangement is situated between the pin-shaped projection and either the glide shoe or a projection part attached to the glide shoe. The pressure fluid is passed through ducts from the loading space of the cylinder bore through the pin-shaped projection and into hydrostatic lubrication spaces on the glide shoe.

534792

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