SU1315020A1 - Centrifugal mill - Google Patents

Abstract

The invention relates to a device for grinding predominantly long fiber materials. The aim of the invention is to improve the quality and grinding efficiency of long fiber materials. The centrifugal mill contains a housing 1. With knives 2, 3,4 mounted on the inner surface and arranged with gaps between the blades 5,6,7 of the rotor 8. The hopper 15 in its lower part has reached you. fully cylindrical provided with vertical partitions 16 forming boot channels, mounted on the eccentric section 18 of the shaft 9 with the possibility of relative rotation and connected to the body 1 by an elastic shell 20. The working edges of the knives 5,6,7 of the rotor 8 are inclined to the radius of the rotor 8 at an angle of 35 - 55, the edges of the interacting knives 2,3, 4, parallel to the edges of the knives 5,6,7. All knives are made sawtooth. The lengthy material is oriented along the axis of the rotor 8 due to circular oscillations of the hopper 15, crushed along the length and. fluxed into individual fibers with knives 5,6,7 and 2,3,4. 3 il. / xi (L f-OT with gi oh

Description

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The invention relates to mills for grinding predominantly long fiber materials and can be used in construction (for grinding, for example, chipboard and fibreboard production waste), chemical-pharmaceutical (for grinding roots, rhizomes, shrubs and leaves), fodder and other industries.

The purpose of the invention is to increase the reliability of the grinding efficiency of long fibrous materials.

FIG. 1 shows a mill, a cut; in fig. 2 - loading hopper, top view; in fig. 3 is a diagram of the arrangement of the cooperating knives of the housing and the rotor.

The centrifugal mill contains a vertical housing 1 with knives 2-4 installed on the inner surface, arranged with gaps between the blades 5-7 of the rotor 8, and the thickness of the blades 2-4 of the housing 1 and the blades 5-7 of the rotor 8, their departure and the gap between them down can be decreasing, forming three successive crushing chambers: coarse crushing in the zone of action of knives 2 and 5, from mid-crushing in the zone of action of knives 3 and b and fine grinding in the zone of action of knives 4 and 7. The rotor 8 is mounted on a vertical shaft 9 s driven 10. At the bottom of the building 1 vsholneno a bottom 11 with a window 12 and the unloading pipe 13. Above the bottom 11 on the shaft 14 of the impeller 9 is mounted.

The hopper 15 in its lower part is cylindrical and provided with vertical partitions 16 forming the loading channels 17. The hopper 15 is mounted on the eccentric portion 18 of the shaft 9 with the possibility of relative rotation of the eccentric portion 18 and the hopper 15, which can be provided, for example, by connecting them through a bearing with a cap 19. The loading hopper 15 is connected to the housing 1 by an elastic shell 20, which seals the space between the hopper 15 and the housing Ij and supports the hopper 15 and prevents its rotation body 1.

The working edges of the 21 knives 5-7 of the rotor 8 are inclined at an angle of 35-55 to the radius R of the rotor 8 to the side, against 50202

opposite direction of rotation. The edges 22 of the blades 2-4 of the housing 1 that interact with the edges 21 are parallel to the edges 21. The mutually 5 operating edges 21 and 22 of the knives 2 - 4 and 5 - 7 are saw-like.

The mill works as follows.

The original product representing

0 is a long fibrous material, falls asleep randomly in the hopper 15, under the action of circular oscillations of the latter and the force of gravity is stratified oriented: elongated

 5, the major axis pieces are arranged parallel to the axis of the vertical rotor 8 and, through the channels 17, enter the zone of action of the knives 5-7 of the rotor B and the knives 2-4 of the housing 1, where they are crushed into particles along the length and unloaded by the impeller 14 through the window 12 and the discharge nipple 13 .

Perform sawtooth edges 21 knives 5-7 rotor 8 at an angle

- 35-55 to the radius of the rotor 8 in the direction opposite to the direction of their rotation, and the arrangement of the sawtooth edges 22 of the knives 2-4 parallel to the edges 21, along with grinding along

30 provides an effective ragging along the entire thickness of the material oriented along the rotor axis 8 due to the predominance of the impact of shear rubbing loads on the zlk.

 A decrease in the angle of inclination of the edges 21 to the radius of the rotor 8 of less than 35 leads to the material being crushed by cutting it into separate pieces without dissolving the thickness. An increase in the angle of inclination of the edges 21 above 55 leads to the material being crushed by a blow, which also does not ensure that the material is fused onto the fiber in thickness. AT

In both cases, the size of the finished product is large, determined by the thickness of the starting material.

50 The invention allows to increase the reliability of the mill due to the orientation. the initial lengthy material along the rotor axis and excluding its winding on the rotor, jamming 55 not the last one, as well as increasing the grinding efficiency by crushing the material on individual fibers in thickness while simultaneously grinding in length.

Claims (1)

Claims of the invention: A centrifugal mill comprising a housing with knives on its inner surface, a rotor with a vertical shaft and knives located between the blades of the housing, a loading hopper and a discharge nozzle, characterized in that, in order to increase the reliability and efficiency of grinding long fiber materials The loading bunker in its lower part is cylindrical, provided with vertical partitions forming the loading channels, eccentrically mounted on the rotor shaft with the possibility of rotation and connected to the body by means of an elastic shell, the working edges of the rotor blades are inclined to its radius at an angle of 35-55 in the direction opposite to the direction of rotation, and the edges of the body knives that interact with them are parallel to the edges of the noI. the rotor, and the interacting edges of the blades of the housing and the rotor are sawtooth. W A / g.2 Editor E. Papp Compiled by A. Rudenko Tehred M. Khodanich Proofreader L. Patay Order 2231/3 Circulation 572Subscription VNIIPI USSR State Committee for inventions and discoveries 113035, Moscow, Zh-35, Raushsk nab., 4/5 Production and printing company, Uzhgorod, st. Project, 4