RU2614990C1 - Hammer-mill - Google Patents

Abstract

FIELD: agriculture.

SUBSTANCE: h ammer mill comprises a loading 1 and an unloading 2 necks, a crushing chamber 3 with hammer rotor 4, decks 5 and a sieve 6 covering the hammer rotor 4. The decks 5 are made in the form of rings installed in the interhammer space of the crushing chamber 3. The sieve and the decks form ring channels. The inner and the end surfaces of the decks are made corrugated, wherein corrugation fins of the deck end surfaces are arranged at an acute angle to the radial direction or to the radius.

EFFECT: invention enables to improve the efficiency of the grinding process.

4 cl, 2 dwg

Description

The present invention relates to techniques for grinding feed and can be used in agriculture for crushing grain materials.

A centrifugal mill is known, comprising a grinding chamber with inlet and outlet nozzles and a disk with radial blades mounted on the drive shaft, a receiving device and a drive, while on the inner surface of the grinding chamber there is a zigzag groove located around the entire perimeter of the grinding chamber to communicate oscillatory motions to the material [one].

The disadvantage of this device is that the crushing chamber is made of an open type, therefore, the source material is crushed and removed from the grinding chamber in almost one revolution (cycle), however, this leads to uneven particle size distribution of the finished product.

The closest technical solution to the present invention is a hammer crusher containing a loading hopper, a hammer drum, an unloading neck, a cylindrical body with grooved decks located inside with grooves perpendicular to the grooves, and the grooves have an angle between faces of 95-105 °, while the front face tilted to the radius at an angle of 30-35 ° [2].

This design has several disadvantages:

- regrinding of the material due to untimely removal of the finished product from the grinding zone;

- grooves in the decks, made perpendicular to the flutes, reduce the corrugated working surface, which reduces the grinding efficiency.

The technical result of the proposed solution is to increase the efficiency of the grinding process by increasing the working area of the deck and timely removal of the finished product from the crushing chamber.

The specified technical result is achieved in that in a hammer mill, including the loading and unloading necks, a grinding chamber with a hammer rotor, decks and a sieve covering the hammer rotor, according to the invention, the decks are made in the form of rings installed in the inter-hammer space of the grinding chamber, and covering the hammer rotor the sieve and decks form annular channels, while the inner and end surfaces of the decks are corrugated and the edges of the grooves of the end surfaces of the decks are at an acute angle to the radial direction (radius).

The execution of decks in the form of rings installed in the inter-hammer space of the crushing chamber increases the working area of the decks, which increases the efficiency of secondary impacts of the particle of the crushed material on the deck.

The corrugated end surfaces of the deck allow you to reduce the speed of movement of the crushed material by inhibiting the air-product layer in the crushing chamber. This is achieved by the fact that the corrugation of the end surfaces of the decks changes the trajectory of the particles with an increase in the axial component of the velocity, reducing the peripheral speed of the air-product layer and increasing the speed and number of collisions of the hammer and the crushed material.

The deviation of the ribs of the grooves of decks on the end surfaces from the radial position increases the radial component of the velocity of the air-product flow due to the angle of reflection of particles from the faces of the grooves in the direction of the sieve, covering the hammer rotor and decks, which contributes to the timely removal of the crushed product from the crushing chamber.

Thus, in the aggregate of these features, the novelty of the solution is provided, aimed at intensifying the grinding process.

As a result of the analysis of the distinguishing features, namely, the execution of decks in the form of rings installed in the inter-hammer space of the crushing chamber, as well as the corrugation of their end surfaces with the deviation of the ribs of the corrugations from the radial position, their identical design was not found in other technical solutions. This circumstance gives full reason to believe that the solution meets the criterion of "inventive step".

The invention is illustrated by drawings.

In FIG. 1 shows a cross section of the proposed crusher, and in FIG. 2 shows a section AA in FIG. one.

The hammer crusher contains a loading 1 and an unloading neck 2, a crushing chamber 3 with a hammer rotor 4, decks 5 and a sieve 6 covering the hammer rotor 4. The decks 5 are made in the form of rings installed in the inter-hammer space of the crushing chamber 4, and the sieve 6 covering the hammer rotor and the decks 5 form annular channels 7, while the inner 8 and end 9 surfaces of the deck 5 are grooved and the ribs 10 of the grooves of the end surfaces 9 dec 5 are at an acute angle to the radial direction (radius).

Hammer crusher works as follows. The material (grain) to be crushed through the feed neck 1 enters the crushing chamber 3, where it receives the first blows with the hammer rotor 4 and is thrown to the periphery into the annular channels 7, hits the decks 5 and the sieve 6. Reflecting from the decks 5 and sieve 6, the particles slow down its movement, however, in the zone of operation of the hammer rotor, they again accelerate. In a steady state process, a continuously rotating layer of material is formed on the entire inner surface of the crushing chamber 3. From multiple collisions with a hammer rotor 4, ribs 10 of the grooves of dec 5 and sieve 6, the material (grain) is crushed. The finished product is removed from the crushing chamber through a sieve 6, covering the hammer rotor 4 and the annular channels 7, into the discharge neck 2.

The invention improves the efficiency of the grinding process.

Literature

1. A.S. 902817 (SU) Centrifugal mill / B.Yu. Bachin, publ. in 1982, bull. No. 5.

2. Patent No. 2519882 (RU) Hammerless crusher / N.F. Vasiliev, A.V. Kobylkin, S.S. Yampilov, G.G. Alkhunsaev, A.A. Alekseev, E.Ts. Galsanova, publ. in 2014, bull. No. 17 is a prototype.

Claims (4)

1. Hammer crusher, including loading and unloading necks, a crushing chamber with a hammer rotor, decks and a sieve covering the hammer rotor, characterized in that the decks are made in the form of rings installed in the inter-hammer space of the crushing chamber. 2. The hammer mill according to claim 1, characterized in that the sieve covering the hammer rotor and the decks form annular channels. 3. Hammer mill according to claim 1, characterized in that the inner and end surfaces of the decks are made corrugated. 4. Hammer mill according to claim 3, characterized in that the ribs of the corrugations of the end surfaces of the decks are located at an acute angle to the radial direction or radius.

Images