| 摘要 |
<p>A beam construction used in the area of single-wire draw of the drying wire (13) in a paper machine or equivalent, which beam construction is placed at the proximity of the straight joint run of the drying wire (13) and the web (W) between the drying cylinder (10) and the leading cylinder (12) or roll on a sector (a) of the leading cylinder (12) or roll that is otherwise free from the drying wire (13). The beam construction comprises a static closing-suction beam (20) with no blowing members. The closing-suction beam (20) covers the drying wire (13) which runs from the drying cylinder (10) onto the subsequent leading cylinder (12) or roll, the web (W) being placed on the opposite face of said wire (13). At the inlet edges of the closing-suction beam (20) there are transverse seals (27,28) placed against the drying wire (13) and the leading cylinder (12) as well as lateral seals (25,25a) at the ends of the closing-suction beam (20), said seals preventing access of air into the spaces (14,15) between the closing-suction beam (20) and the drying wire (13) and the leading cylinder (12). Negative pressure is produced in the latter spaces (14,15) and in the inlet nip (N+) between the leading cylinder (12) and the drying wire (13) by the intermediate of the perforations (12c) in the mantle (12b) of the leading cylinder ( 12) out of the negative pressure prevailing inside the mantle (12b) of the leading cylinder ( 12). <IMAGE></p> |
