RU2354454C2 - Rotor of mill-ventilator - Google Patents

Abstract

FIELD: mining.

SUBSTANCE: invention refers to installations for material crumbling, particularly to rotors of mills-ventilators and can be implemented in mining, building and other branches of industry. The rotor of the mill-ventilator consists of main and covering disks, whereon milling blades are arranged, and of a conic fender disk installed on the main disk; the fender disk has generatrix inclined to vertical. There is at least one conic fender disk on the main disk, angle of generatrix incline of which is not equal to the generatrix incline angle of the first fender disk.

EFFECT: invention facilitates reduction of main disk wear, increase of distributing uniformity of material on milling blades and increase of their wear resistance.

2 cl, 1 dwg

Description

The invention relates to devices for grinding materials, in particular to the rotors of mill-fans, and can be applied in mining, construction and other industries.

Known rotor of a mill-fan, containing a distributing jack-off disk in the form of segments arranged in a spiral (PL 272648; В02С; 05/19/88).

The disadvantage of this solution is the design complexity and low ventilation ability of the mill containing such a rotor.

The closest solution is the rotor of the mill-fan, containing a baffle disk mounted on the main disk in the form of a conical shell, the generatrix of which is inclined to the vertical at an angle (SU 927300; В02С 13/26; 20.05.80).

The disadvantage of this known device is the large wear of the main disk at the location of the breaker disk and the insufficient distribution function of the disk in mills of large and extra large sizes.

The objective of the invention is to reduce the wear of the main disk, increase the uniformity of the distribution of material across the grinding blades, especially in large size mills, and thereby increase their wear resistance with a simple design and satisfactory ventilating ability of the mill.

This task is achieved due to the fact that on the rotor of the mill-fan, including the main and covering disks on which the grinding blades are located, and a conical baffle disk mounted on the main disk with a generatrix inclined to the vertical, the main disk contains at least one additional conical a baffle plate, the angle of inclination of the generatrix of which is not equal to the angle of inclination of the generatrix of the first conical baffle plate.

A preferred embodiment is one in which the angle of inclination of the generators of the conical baffle plates to the vertical increases in the direction from the center of the rotor to the grinding blades.

An example embodiment of the invention is illustrated in the drawing.

The rotor of the mill-fan contains a main disk 1, a covering disk 2, grinding blades 3. On the main disk 1 there is a conical baffle disk 4 and an additional baffle disk 5, the angle α of inclination of the generatrix of the cone of the disk 4 is not equal to the angle β of the inclination of the generatrix of the cone of the disk 5.

The device operates as follows.

The milled material entering through the feed pipe (not shown) into the region of the central part of the main disk 1 falls onto the grinding blades 3 and is ground by them. When moving toward the grinding blades 3, the material moves near the inner wall of the main disk 1. On the way, the material meets the bump discs 5 and 4. When hitting the discs 4 and 5, the material particles are further milled and, changing their direction, move along the length of the grinding blade 3 evenly. Due to the fact that there are at least two baffle disks and the angle α of inclination of the generatrix of the disk 4 to the vertical is not equal to the angle β of the inclination of the generatrix of the disk 5 to the vertical, the distribution of material along the length of the grinding blade 3 is more efficient, which is especially important for mills of large sizes. In addition, an additional separation effect is achieved, because the material, passing from one baffle plate to another, is screened by a ventilated component, which entrains small particles of ground material in the direction of the finished dust stream. Moreover, when installing disks 4 and 5 with angles of α and β forming to the vertical, increasing from the center to the blades, sufficiently large particles descending by inertia from the baffle disks are additionally milled due to the intersection of their motion paths. The rotor is durable, compact, does not interfere with ventilation and increases the efficiency of the mill.

Claims (2)

1. The rotor of the mill-fan, containing the main and covering disks, on which the grinding blades are placed, and a conical baffle disk mounted on the main disk with a generatrix inclined to the vertical, characterized in that at least one additional conical a fender disk, the angle of inclination of the generatrix of which is not equal to the angle of inclination of the generatrix of the first fender disk. 2. The rotor according to claim 1, characterized in that the angles of inclination of the generatrix of the conical baffle plates to the vertical increase in the direction from the center of the rotor to the grinding blades.