RU2232640C2 - Hammer crusher - Google Patents

Abstract

FIELD: crushing materials; construction engineering; agricultural and other industries.

SUBSTANCE: proposed hammer crusher has housing, crushing chamber, inlet and outlet necks, vortex chamber, rotor, concaves, screen, air and material flow forming unit mounted on vertical swivel axle; its upper surface is detachable at friction coefficient of 0.25-0.65 and lower surface is provided with additional concave consisting of strips with riffled faces; riffle angle is 45-90 deg. Angle of inclination of working surfaces may be adjustable relative to level:25-45 deg. for upper surface and 10-20 deg. for lower surface.

EFFECT: improved quality of grinding; enhanced smoothness of granulometric composition; reduced power requirements.

2 cl, 3 dwg

Description

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

A device for crushing materials, including a crushing chamber with an inlet and outlet mouths, two vortex chambers mounted on both sides of the inlet neck, a rotor, decks and sieve [1].

However, the known device does not provide a uniform supply of material into the crushing chamber and the optimal particle size distribution of the finished product.

The objective of the invention is to improve the quality of grinding, obtaining a more uniform particle size distribution of the finished product and reducing the energy consumption of the crushing process.

The problem is solved in such a way that a hammer mill, including a crushing chamber with an inlet and an outlet neck, two vortex chambers installed on both sides of the inlet neck, a rotor, decks and sieve, means for forming air and material flows, according to the invention, has means for forming flows air and material, which is mounted on a vertical rotary axis, while the upper surface of the means for forming air and material flows is removable with a friction coefficient of 0.25 ... 0.65, and the lower I surface - provided with additional deck consisting of planks with serrated edges, the angle riffle - 45-90 °.

In addition, a new feature in the hammer mill is that the angle of inclination of the working surfaces is adjustable horizontally: for the upper surface 25-45 ° and for the lower - 10-20 °.

Figure 1 shows a hammer mill; figure 2 is a top view of the inlet neck; figure 3 is a view of the strap.

The hammer crusher consists of a housing 1, a crushing chamber 2, an inlet 3 and an outlet 4 necks, vortex chambers 5 and 6, a rotor 7, a dec 8, a sieve 9, means for forming air and material flows 10 with an upper working surface 11 and a lower working surface 12, vertical from rotation of the means for forming flows 13.

The lower working surface 12 consists of slats 14 having flutes 15.

Hammer crusher works as follows. When the hammer rotor 7 is rotated counterclockwise, the material, for example, the grain mass, is directed to the crushing chamber 2 under the influence of its own weight and by means of the air flow through the inlet portion 3 and the formation of flows 10 of the upper working surface 11. Using the upper working surface 11, the material is uniformly distributed over the width of the crushing chamber 2, where it is crushed from the impacts of the hammers of the rotor 7. With the speed given by the hammers of the rotor 7, the crushed material enters the vortex chamber 5, where it swirls, and, striking the sharp edges of the deck 8, is additionally crushed, after which, changing direction and losing speed, it again falls under the blows of the hammers of the rotor 7 and is sent to the sieve 9. A small fraction of the material through the openings of the sieve 9 and the outlet neck 4 is removed from the crusher by air flows, and the large fraction is sent to the swirl chamber 6 by blows of the hammers of the rotor 7. In the zone of the swirl chamber 6, the material is involved tsya in a swirling motion and directed to lower working surface 12 of the means for forming flows 10, where the additional grinding material, the presence on the surface of the splines 14 riffle 15 increases grinding efficiency. The material, reflected from the lower working surface 12 and the impacts of the hammers of the rotor 7, falls into the zone of the vortex chamber 5, where it is mixed with the newly incoming material, and the grinding cycle is repeated. The design of the hammer mill provides for reverse movement.

The quality of grinding and a decrease in the energy intensity of the process are due to the fact that an additional deck is installed, installed on the lower working surface of the means for forming flows, which allows more fully use the kinetic energy of the particle, as well as due to a more uniform controlled flow of material into the crushing chamber.

Sources of information

1. USSR copyright certificate No. 1230680, cl. B 02 C 13/12, 1986.

Claims (2)

1. Hammer mill, including a crushing chamber with an inlet and outlet mouths, two vortex chambers installed on both sides of the inlet neck, a rotor, decks and sieve, means for forming air and material flows, characterized in that the means for forming air and material flows mounted on a vertical rotary axis, while the upper surface of the means for forming air and material flows is removable with a friction coefficient of 0.25-0.65, and the lower surface is equipped with an additional deck, consisting consisting of strips with serrated edges, the angle riffle 45-90 °. 2. The crusher according to claim 1, characterized in that the angle of inclination of the working surfaces is made adjustable relative to the horizontal: for the upper surface 25-45 ° and for the lower 10-20 °.

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