Turbulence roller

Abstract

The invention discloses a turbulence roller. The turbulence roller comprises a roller core, the roller core is sleeved with multiple annular friction pieces detachably, a spacer sleeve is detachably installed between every two adjacent annular friction pieces, the roller core, the annular friction pieces and the spacer sleeves are arranged coaxially, multiple protruding strips are distributed on both surfaces of each annular friction piece, the protruding strips are arrayed in a radialized mode on the surfaces of each annular friction piece, and the protruding strips of the two opposite surfaces of every two adjacent annular friction pieces are arranged in a staggered mode. By means of the turbulence roller, turbulence which is small in size and high in intensity can be generated, large transverse flow does not occur, when the deviation of basis weight in cross direction of paper sheets is adjusted through dilution water, the range of transverse diffusion of the dilution water added at certain points can not be excessively large, so that accurate adjustment is achieved, the transverse array of fibers in the paper sheets can be increased, and therefore the tensile force difference between the longitudinal direction and the transverse direction can be decreased.

Description

technical field [0001] The present invention relates to turbulent flow devices in headboxes of paper machines and similar machines, and in particular to a turbulent roll for dispersing fiber suspension in the headbox to form a homogeneous paper sheet or fibrous web. Background technique [0002] The headbox is a key device of the paper machine, which plays a key role in making good quality paper sheets. The turbulence roll belongs to the leveling element of the headbox, and its key function is to generate appropriate turbulent flow, so that the fiber flocculation in the slurry can be dispersed, and at the same time, the slurry flow should be kept stable. [0003] At present, the headboxes used in medium and low speed paper machines are mostly homogenizing roller headboxes. The homogenizing roller is a hollow roller with many through holes distributed on its roller surface. When the slurry flow passes through the homogenizing roller, a large lateral flow will be generated. ...

AI Technical Summary

Problems solved by technology

When the pulp flow passes through the homogenizing roller, a large lateral flow will be generated. Although the fiber clusters can be dispersed, the pulp flow will not be stable enough.

For this reason, a longer buffer zone needs to be set up downstream, but a longer buffer zone will cause the dispersed fiber flocculation to re-flocculate, thus affecting the evenness of the paper.

Especially when there is a dilution water adjustment device in the slurry distributor, when the fixed-point dilution water and the main slurry flow flow through the wide box, and the agitation of the homogenizing roller produces a large lateral flow, the dilution water will be greatly weakened. Adjustment effect

Experiments have proved that the adjustment of dilution water in the existing headbox of the homogenizing roller has little effect

Images