ЭФФЕКТИВНОСТЬ БЕЗНОЖЕВОГО РАЗМОЛА ВОЛОКНИСТЫХ ПОЛУФАБРИКАТОВ Тихонов Илья Сергеевич аспирант Сибирский государственный университет науки и технологий имени академика М.Ф. Решетнева, Красноярск Кожухов Виктор Анатольевич кандидат технических наук , доцент Сибирский государственный университет науки и технологий имени академика М.Ф. Решетнева, Красноярск Алешкевич Юрий Давыдович доктор технических наук, профессор Сибирский государственный университет науки и технологий имени академика М.Ф. Решетнева, Красноярск ANNOTATION In this article two knifeless grinders are compared: hydrodynamic acoustic generator and "stream barrier".Operating principles, advantages and shortcomings machines of the are described.АННОТАЦИЯ В данной статье сравниваются две установки безножевого размола: гидродинамический акустический генератор и "струя-преграда". Описываются принцип работы, преимущества и недостатки в работе установок.

The mechanical and hydrodynamic phenomena occurring in the refining zones of disc refiners cause fibres to undergo fibrillation. This paper presents a study of the changes occurring during fibre fibrillation as expressed in terms of the fibrillation index when refining pulp with a 10%, 15%, and 20% consistency. The influences of the tangential force of a circular bar and a straight bar on fibre fibrillation were compared. The changes in the tangential force are shown to depend on the angle between the tangent to the cutting edge and the radius from the centre of the disk to the tangency point. Increasing the angle between the tangent to the cutting edge and the radius from the centre of the disk to the tangency point gives higher fibrillation index values. The study revealed a relationship between fibre fibrillation and the strength characteristics of handsheets.

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The article presents a methodology for calculating the force effect on a fibrous suspension of working bodies in a centrifugal grinding apparatus. The aim of the research is to calculate the force per tooth of an inertial body at different speeds of rotation of the rotor, to determine the effect of the circumferential speed of movement of inertial bodies on the grinding process of fibrous semi-finished products. The article discusses the mechanism of grinding on a centrifugal knife grinding apparatus, determines the tangential shear forces at the contact of the grinding satellite knives with the grinding bowl knives, determines the effect on the fiber of rolling friction forces and sliding friction forces when the grinding satellite knives come into contact with the grinding bowl knives, as well as the effect of specific pressure at the point of contact of the satellite knives with the grinding bowl knives under the influence of inertial forces. Based on the research results, it is scientifically substantiated that the forces arising at the minimum of the considered values of the rotation speed of inertial bodies are sufficient to break the fiber when using this installation for grinding fibrous semi-finished products. An increase in the speed of rotation of the satellites causes a positive change in the physical and mechanical characteristics of the finished castings.