| 摘要 |
The shoe press unit (10), for working a paper or cardboard web, has at least one piston/cylinder unit (22). The part of the total hydrostatic pressure surface at the total effective piston working surfaces at the pistons (24) is equal to or greater than the part from the wear-resistant low-friction material of the total pressure surface. The piston (24) has at least one hydrostatic pressure surface (30), with a round and preferably circular contour, or an oval contour, or the contour of a circle arc segment. The piston (24) has at least one hydrostatic pressure surface (30) or at least two, formed by a hydrostatic pocket. The piston (24) has at least two pressure surfaces, formed by a wear-resistant low-friction material. The piston (24) has at least two or four hydrostatic pressure surfaces (30) and at least two or four wear-resistant low-friction pressure surfaces, with an equal number of hydrostatic and pressure surfaces, or two wear-resistant low-friction pressure surfaces for each hydrostatic pressure surface (30). The piston (24) has a number of hydrostatic pressure surfaces (30) of the same dimensions and a number of wear-resistant low-friction pressure surfaces of the same size. The hydrostatic pressure surfaces (30) are larger than the wear-resistant low-friction pressure surfaces. The piston/cylinder units (22) are next to each other across the direction (L) of web travel. The pistons (24) move within cylinders (26) at or in a carrier (20). The press mantle (16) or belt is flexible. The press shoe (18) has a generally concave support surface (36) against the press mantle (16) or belt, to form the extended press gap (14) in the direction (L) of web travel. The shoe press has a shoe press roller with a flexible mantle (16).
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