SU368878A1 - CENTRIFUGAL MILL - Google Patents

Description

The centrifugal mill is designed for grinding coal, ore and other materials.

The known mill for grinding coal contains a stator, an electrically driven rotor, and a loading cone.

In the proposed mill / test, in order to increase the efficiency of material grinding and reliability, the working surfaces of the stator and the rotor are made in the form of surfaces of unipolar linear hyperboloids and are provided with grooves in which they are fixedly mounted. opposite tilt rods.

For the purpose of uniform wear and maximum use of the rods, they can be fixed with the possibility of rotation around their axes.

The drawing shows the proposed mill, the cut.

The centrifugal mill includes a loading cone /, stator 2, rotor 3, shaft 4, drive shaft 5, bevel gear 6, rod 7. The stator 2 and rotor 3 are mounted vertically. The stator, which is a hollow cone, is fixed on the foundation. The rotor 3 is mounted on the shaft 4, which is installed in the supports.

The outer surface of the rotor and the inner surface of the stator are parts of the surfaces of single-cavity ruled hyperboloids. On such surfaces are laid straight at some angle to

axis of rotation of the hyperboloid. Along these lines, grooves with opposite inclination are made on the inner surface of the stator and on the outer surface of the rotor, in which steel straight rods 7 of a round profile are laid and rigidly fixed.

Thus, the stator and the rotor have ribbed working surfaces with a rehash, and the cores are

two hyperboloids with widened, ec at the top of the socket and tapering down to a minimum clearance, which is regulated by the movement of the rotor vertically. The rotor drive is located at the bottom, and the loading cone / at the top. Rotation to the rotor is transmitted from the electric motor through the drive shaft 5 and the bevel gear pair 6.

The proposed centrifugal mill works as follows. The grinding of the material poured through the loading cone is carried out in an annular working space formed by two converging hyperboloid surfaces. Material being crushed

advancing under the force of gravity from top to bottom along the working space is crushed between the working rods. The intersecting rods prevent the ground particles from spilling down with the dry material and at the same time pushing the entire mass along the grooves with the stator rods, like the screw, with the raw material sticking together. In addition, intersecting stator and rotor rods improve particle trapping and grinding.

As the rods rotate. They rotate at a certain angle and re-fasten. After several rotations around its axis, the rods have multiple helical flats, maintaining the original diameter along the helix, which is very important for adjusting the working gap of the mill.

Subject invention

Claims (2)

1. Centrifugal mill for grinding coal, ore and similar materials, containing a stator, an electric rotor, a charging cone, which, in order to increase the grinding efficiency of the material and increase the reliability of the mill, the working surfaces of the stator and rotor look like single-line ones hyperbolic and in them are made grooves in which rods fixed with opposite aklon are fixed. 2. Mill according to claim 1, characterized in that, for the purpose of uniform wear and maximum use of the rods, the latter are fixed with the possibility of rotation around their axes.