Tooth-profile-variable grinding disc for cylindrical pulping machine

Abstract

The invention relates to a tooth-profile-variable grinding disc for a cylindrical pulping machine. The grinding disc comprises 4-8 rotor grinding discs fixed on a rotor of the pulping machine and 4-8stator grinding discs fixed on a sliding block of a shell of the pulping machine. The grinding disc further comprises an inlet end, a pulping area and an outlet end, wherein the inlet end, the pulpingarea and the outlet end are all provided with grinding teeth and grooves, and the grinding teeth and the grooves at the inlet end, the grinding area and the outlet end are different in number, shape,width or cut-in angle. The grinding disc of the invention adopts grinding teeth and groove structures with various parameters such as variable shapes, widths, angles and the like, so paper pulp raw materials can enter the pulp grinding area, the comprehensive pulp grinding function of the grinding disc is enhanced, and pulping quality and economic benefits are improved.

Description

technical field [0001] The invention relates to a refiner disc in the paper-making and pulping industry, in particular to a cylindrical refiner disc with variable tooth shape. Background technique [0002] The refiner is the main equipment for paper pulping. There are double disc and cone refiners, as well as cylindrical refiners. The structure of the cylindrical refiner is mainly composed of an organic casing, a frame, a rotor, a slide plate, a pulp inlet channel, and a pulp outlet channel. One end of the rotor is the power end, which is powered by an external power source to make it rotate. The other end of the rotor is hollow inside, which is used as a passage for pulp raw materials. The pulp raw materials are transported by the front-end pipeline and then enter the hollow passage of the rotor, at about the middle of the rotor. The overflow hole overflows into the grinding discs installed on both sides of the hole along the axial direction. There is a refining area on t...

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Problems solved by technology

However, in the current prior art, all the grinding teeth and grooves in these refining areas and the generatrix cut-in angle α of the grinding disc are set to be arranged at the same fixed angle, and the width of the grinding teeth and grooves It is also always equal in the entire refining area of ​​the refining disc, and the tooth profile of the grinding teeth has little or no change, and the refining area of ​​the refining disc mainly plays the role of leveling in the later stage of refining. However, the existing grinding teeth The structural design of grooves and grooves limits the effect on the refining of pulp raw materials, resulting in a narrow range of refining quality control, which wastes resources and lower production efficiency

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