Refiner

Abstract

The present invention discloses a refiner which comprises a first grinding disc, a second grinding disc and an intermediate grinding disc that rotate relatively. The intermediate grinding disc is installed between the first grinding disc and the second grinding disc. Tapered rollers are installed along the peripheral direction of the intermediate grinding disc on the grinding disc frame of the grinding disc. The small ends of the tapered rollers are inward. When the first grinding disc and the second grinding disc are dragged by a crankshaft to rotate relatively, the tapered rollers on the intermediate grinding disc must be driven to rotate. Thus the tapered rollers rotate and operate on the contact working surfaces of the grinding discs. On one hand, the refiner of the invention has the advantages of greatly reduced power consumption, reduced material damage, prolonged service lifetime and increased operating efficiency; and on the other hand, as many tapered rollers are provided, when the tapered rollers rotate and operate with a high speed, the material is crushed repeatedly by the tapered rollers which operate in high speed one after another once enters the refiner. Therefore the main grinding mode of the invention is grinding. The material is easily grinded uniformly and regularly. The length of the fiber is protected and the performance of the refiner according to the invention is remarkably reinforced compared with the prior grinder.

Description

technical field [0001] The invention relates to a papermaking machine, in particular to a refiner. Background technique [0002] Existing refiners are classified according to the shapes of their abrasive working parts, and mainly include three types: disc type, conical type and cylindrical type. Taking the disc type as an example, its abrasive working parts mainly include two major parts, a moving grinding disc and a static grinding disc. When the moving grinding disc is driven by the shaft to rotate, there is a sliding friction between the moving grinding disc and the static grinding disc with great resistance. As a result, the power consumption is too high, which causes the temperature rise of the abrasive working parts to be too fast, the material loss is serious, and the service life is shortened, so it must be replaced and updated frequently. In order to cool down in time, the material to be ground has to use water-cooled slurry, and the work efficiency is low. Moreov...

AI Technical Summary

Problems solved by technology

[0003] In order to solve the technical problems of excessive power consumption and excessive material loss caused by the excessive sliding friction between the abrasive working parts during the operation of the existing refiner, the present invention provides a , a refiner that improves work efficiency

Images