| 摘要 |
The turbulence generator, for the stock inlet of a papermaking or cardboard production machine, is composed of a number of channels formed by a bundle of tubes (2,3). Only some of the tubes extend as far as the outlet surface. The turbulence generator, for the stock inlet of a papermaking or cardboard production machine, is composed of a number of channels formed by a bundle of tubes (2,3). The tubes (2) which extend as far at the outlet surface are flanked by shorter tubes (3). The longer tubes (2), as seen from the front, are laid in horizontal rows, with tubes of the same length in a row. The rows alternate with tubes as far as the outlet surface and tubes which end at a gap from the outlet surface. The ends of the shorter tubes are at a gap of 0.5-4.0 times the hydraulic diameter of the tube channels at the outlet zone, and preferably 2.5-3.5 times the hydraulic channel diameter. The channels alternate between the inner side of a tube and the outer side of an adjacent tube. The outer sides of the tubes (2,3) have a rectangular or square or triangular and pref. equilateral cross section, at least at the outlet side. The outer surfaces of the tubes (2,3) can also be in a regular polygon shape, at least at the outlet side, or they can be round. The tubes (2,3) are at least partially welded to their adjacent tubes, at their contact surfaces, or they are bonded together by an adhesive or solder. The channels have inserts to reduce their diameter, with inserts of different lengths and with a different hydraulic diameter.
|
