SU1072898A1 - Apparatus for grinding - Google Patents

Abstract

A DEVICE FOR CRUSHING predominantly woody waste (L tc 00 from 00 fi8.1 dov, comprising a housing, a vertically disposed rotor with wedge-shaped cutting elements interacting with fixed blades, characterized in that, in order to reduce the energy consumption for grinding and improve the quality of the finished product, the expense of maintaining a constant gap between the cutting bodies and fixed knives, the rotor is made of a set of disks, the ends of the disks have radially spaced tapered grooves tapering to the periphery, in which ukr Lena tapered cutting bodies, wherein paz upper and lower ends kazh; dogo disk offset.

Description

The invention relates to a device for shredding wood waste and can be used in the timber and woodworking industries.

Known devices for grinding, comprising a housing with fixed and movable blades 1.

Odiako such devices are energy-intensive.

The closest technical solution is a device for chopping predominantly wood waste, comprising a housing, a vertically disposed rotor with wedge-shaped cutting elements interacting with fixed blades 2.

However, in this device, the advantages of rational cutting edge angles cannot be fully utilized to reduce energy consumption due to the unsuccessful design of the cutting moving and stationary bodies. The rotor of the device, assembled from knives of the proposed type, cannot possess a sufficient main moment due to the concentration of its mass near the axis of rotation. Adjusting the gaps between moving and stationary cutting elements is difficult, since any movement in the vertical direction of the comb of fixed knives to adjust the gaps between any moving knife and its corresponding pair of comb cutters causes a change in the gaps in the other cutting pairs. Such a hard relationship forces one to make combs of fixed knives with hollows much larger than the thickness of the incisors of the movable knife in order to compensate for errors in manufacturing. The gaps in the cutting pairs are obtained or less than or greater than 0.5 mm optimal for chippers woodworking machines. During operation, when re-cutting the incisors, the scatter of the gaps increases even more, which adversely affects the cutting conditions. Accordingly, the increased energy consumption for cutting. The complex shape of cutting elements makes it difficult to sharpen them, requiring special equipment and fixtures.

The purpose of the invention is to reduce the energy consumption for grinding and improve the quality of the finished product by maintaining a constant gap between the cutting bodies and fixed blades.

This goal is achieved by the fact that, in a device for chopping mainly wood waste, comprising a housing, a vertically positioned rotor with wedge-shaped cutting elements interacting with fixed blades, the rotor is made of a set of disks, the ends of the disks have wedge-shaped grooves narrowed to the periphery and reinforced wedge-shaped cutting organs, with the grooves in the upper and lower ends of each disc shifted.

FIG. 1 shows a schematic diagram of a grinding apparatus; in fig. 2 is a variant of the design scheme; in fig. 3 is a view A of FIG. 2; in fig. 4 shows a section BB in FIG. 3 (the interaction of moving and stationary cutting bodies and their geometrical parameters); in fig. 5 - setting the fixed cutter on

adjustment shim.

The grinding device comprises a housing G carrying flanges 2 with openings for fastening fixed knives 3 mounted on adjusting gaskets 4. Inside the housing 1 there is a rotor assembled from disks 5 mounted with spline sleeves 6 on the drive shaft 7, so that the upper disk has some angular displacement with respect to the lower one for uniform process

0 cut. Each disk has radially wedge-shaped grooves 8 at its ends, tapering toward the periphery of the disk, the grooves in the upper and lower ends being made with mutual angular displacement.

 In these grooves, having a dovetail profile in cross section, wedge-shaped cutting elements 9 are inserted, having a cross-section of a similar profile and clamped in the grooves by set screws 10 and lock nuts 11. When the elements are installed, the set screws are screwed into the slotted holes of the slit sleeves 6 and rings 12. A spreading impeller 13 is installed above the discs. The impeller of a fan 14 is located under the rotor. The drawing 15 shows a window 15 for removing the ground mass.

The crushed waste enters the grinding device from the top and spreads the blades of the impeller 13 onto the cutting elements. The falls between the cutting edges of the moving element and the fixed knife of the upper tier are cut by them and, falling down, fall under the cutting edges of the elements of the lower tusk. In this sequence, the material passes through all

5 from top to bottom, subjected to repeated action of the cutting elements, thus achieving the required degree of grinding, and thrown by the fan 14 into the window 15. The presence of shims 4 of different thickness allows the optimal clearance of the first gap between the cutting edges of each stationary, knife and interacting with him, a blizzard of movable cutting elements, which reduces the cutting forces and, accordingly, the intensity of the grinding process. As the elements become blunt and their subsequent refills, the gaskets under the fixed knives are replaced with thicker ones, which allows

Claims (1)

A device for grinding mainly wood waste, comprising a housing, a vertically arranged rotor with wedge-shaped cutting elements interacting with fixed knives, characterized in that, in order to reduce energy consumption for grinding and improve the quality of the finished product by maintaining a constant gap between the cutting organs and stationary knives, the rotor is made of a set of disks, the ends of the disks have wedge-shaped grooves radially tapering to the periphery, in which wedge-shaped uschie bodies than at slots in the upper and lower ends kazh ₇ dogo disk offset.