SU995863A1 - Hammer crusher - Google Patents

Description

(5) HAMMER CRUSHER

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The invention relates to devices for grinding materials and can be applied in the agricultural, construction and other industries.

Known hammer crusher, which includes a crushing chamber with a hammer and a sieve for the product, a fan and a cyclone which form with the chamber a closed air noroiK, which transports the finished product passed through the sieve 13

However, the installation is known to be cumbersome and energy-intensive, and the low screening capacity of the sieve reduces its performance.

Closest to the present invention is a hammer mill for grinding materials, mainly grain, including a crushing chamber with a rotor, a loading and unloading can / m, a sedimentary chamber with a curvilinear sieve 2.

The disadvantage of such hammer mills is the low efficiency of the reparation of the finished product.

The purpose of the invention is to increase the efficiency of separation of the finished product.

The goal is achieved by the fact that hammer crushers for grinding materials, mainly grains, including a 4-hole chamber with a rotor, loading and unloading channels, a sedimentary chamber with a curvilinear sieve, are equipped with louvers, installed with a decrease relative to the sieve and directed to the side of the sedimentary chamber, while behind the last side of its side, a fan is mounted, connected by means of a cylindrical pipe and a diffuser with a connecting chamber, and (Side The surface of the cylindrical nozzle has louvres directed along the rotation of the fan.

Fig, 1 shows a hammer crusher general view; in fig. 2 view A in FIG. 1i in FIG. 3 — node 1 in FIG. 1,

The crusher consists of a crushing chamber 1 with a hammer rotor 2, a loading 3 and unloading k channels, an air-distributing sieve 5, louver 6, a cylindrical nozzle 7 with louver 8 attached to the suction inlet of the fan 9. Sieve 5, louver 6 and two side walls sediment chambers 10 form a rectangular separation channel installed in the continuation of the discharge channel k and narrowing along the product.

A fan 9 is attached to the side wall of the sediment chamber, the cylindrical pipe 7 is attached to the suction inlet, and a diffuser 11 for supplying air to the sieve 5 is connected to the discharge port. The gap between the sieve 5 and the louvers 6 is adjusted by a screw 12, the amount and speed of air by the valve 13 .

FIG. 3 shows the arrangement of one section of the separation channel, the state of 1 of the screen 5 and the louvre 6 elements. The blinds are made of sheet steel, in which the slotted windows on three sides and flanges of the plates in the direction of rotation of the fan blades are made of slotted windows for air with the finished product. Similar air slot windows are made along the generatrix of a cylindrical nozzle 7, with the horned blinds plz directed towards the fan blades. For feeds of the ground product into the crusher, channel H is arranged,

Crusher works as follows.

Bulk product, such as grain, through channel 3 enters the crushing chamber 1, is crushed by hammer rotor 2 and for one revolution of the rotor a mixture of small particles (finished product) and large undersized particles enters through the discharge channel 4 into the separating channel between the sieve 5 and louver 6 where its separation is made.

Here, at section C (Fig. 3), the air passing through the sieve passes through the louver 6, the small finished product

Into the sediment chamber 10, Leaving the product mixture, enters section B where all the compact SLA, which is thinning in shape of the channel, is formed, which is processed more efficiently by air in subsequent sections. This is due to the fact that the effect of air on a compact layer of particles is greater than that on a rarefied,

The undersized product, through the slit-adjustable screw 12, passes through channel 14 for regrinding to the crusher. Due to the decrease in air velocity in chamber 10, the finished product is separated from it, settles down and conveyor 15 leaves the machine. Air with a small amount of powdery particles is entrained by the fan in rotational motion around the pipe 7 in the direction of its louver 8. Through the windows in the pipe the air enters the fan 9 for subsequent supply to the sieve 5 and: further closed loop. A layer of powdery particles, due to mass, is carried by inertia past the ports of the branch pipe, is thrown off by centrifugal forces from the bottom and is deposited in the chamber 10 together with the finished product. Excessive air from the closed air stream is removed through the filtering surface of one of the walls of the diffuser 11.

In the proposed design, the same volume of air is involved in two stages of separation - in the channel and the pipe. In the channel, the product is repeatedly blown with air as it moves downward, which allows for qualitative separation of the product. High-quality separation prevents small particles from being re-crushed, thereby increasing crusher productivity and preventing degradation of the product due to over-grinding.

The coarseness of the finished product can be controlled by an air flap 13. With a larger opening of the flap, more air passes through the sieve 5, its pressure on the product layer rises and larger particles enter the finished product, fewer particles return to regrind

By adjusting the width of the separation channel at the outlet by the screw 12, the product passes through the channel unhindered, i.e.

canal productivity is consistent with crusher performance.

Performing the crusher according to the invention allows to qualitatively sort the crushed product and increase the productivity of the crusher.

Claims (2)

1. USSR author's certificate number 625765, KI. B 02 C 13/00, 1976. 2. USSR author's certificate №, cl. B 02 S 13/00, 1977 (prototype). V / /BUT//  / w about eleven. e / f5 (par. 1 .- i /