SU1724357A2 - Hammer crusher - Google Patents

Abstract

The invention relates to a device for grinding materials. The goal is to increase the efficiency of the grinding process. The crusher consists of a housing 1, a rotor 2, on which hammers 4 are mounted along the screw lines of an even starting screw, a trellised deck consisting of involute and cylindrical sections, to which a truncated hollow cone with a perforated surface is rigidly attached to the end opposite the loading side whose hole diameter increases from a larger base to a smaller one. The cone consists of involute and conic sections, which are a continuation of the involute and cylindrical sections of the lattice deck. On the inner surface of the blank side of the housing 1 is installed a bump with a toroidal working surface. 3 il.

Description

one

at

Yo

The invention relates to devices for grinding materials, can be used in the agricultural, construction and other industries and is an improvement of the invention according to the author. No. 1329820.

The purpose of the invention is to increase the efficiency of the grinding process.

FIG. 1 shows hammer crusher, cross section; in fig. 2 shows section A-A in FIG. one; in fig. 3 is a diagram of the arrangement of hammers on a rotor of a hammer crusher along helical lines of a two-way screw with variable pitch.

Hammer crusher consists of housing 1. rotor 2 with axes of suspension of grinding elements in the form of hammers 4, hopper 5 loading, discharge nozzle 6 and trellised deck 7 made of alternating sections of cylindrical 8 and involute 9, respectively, the radius and curvature which decrease the rotational speed of the rotor, while the gap between the ends of the hammers and the deck is determined from the dependence

3 51+ (),

where Si is the minimum allowable gap between the ends of the hammers and the deck;

S2 is the maximum allowable gap between the ends of the hammers and the deck;

n is the serial number of the cylindrical sections.

A hollow truncated cone 10 rigidly attached to the end of the lattice deck 7 located opposite to the material discharge opening is made up of alternating sections of conical 11 and involute 12 forms, which are a continuation of the cylindrical and involute forms of deck 7. On the surface of a hollow truncated cone 10, perforations are made, the diameter of the holes of which gradually increases from the larger base to the smaller base of the cone. A chipper 13 fixed on its deaf lateral inside of the body 1 of the crusher contains a toroidal working surface at its end, and its cylindrical external surface serves as a base for mounting the trellis deck 7 and a hollow truncated cone 10 in the working chamber of the crusher. On the inner side surface of the crusher body 1, in which the loading opening is made, slats 14 are installed, which serve to support the trellis deck 7 in the working position.

Hammer crusher works as follows.

From the hopper 5 loading material through an opening in the side of the housing 1 crusher enters the working chamber of the crusher by gravity, which is formed of a trellised deck 7 and a hollow truncated cone 10, and from the ends is limited by the sides of the crusher housing 1. The hammers of the rotating rotor 2, when meeting with the material, strike the particles on the particles and draw it into rotational motion. As a result of this impact, the material is crushed by a blow, grinding the particles together,

and also due to the destruction of the particles during their interaction with the surface of the grid deck. Increased clearance between the ends of the hammers and the working surface of the lattice deck 7 at the entrance of the presence of involute

sections 9 contributes to the intensive evacuation of the destroyed particles outside the working chamber and bringing them to the place of storage through the pipe 5. Unground particles due to flowability and the action of hammers are transported to the perforated surface of the hollow truncated cone 10, where as they move they fall into areas with a reduced gap between the ends of the hammers and the perforated surface of the truncated cone 10.

The increased movement of unground particles along the axis of the working chamber is due to the fact that the hammers

mounted on the screw lines of the even-end screw. The conditions for evacuating the destroyed particles located on the perforated surface of the truncated cone 10 are improved due to the presence of

the taper of involute portions and perforation holes, which increase in the direction of movement of the material. The slope of the perforated work surface creates conditions for the delay of the axial and

rotational movement of particles by the edges of perforation holes. The most difficult to grind particles of material accumulate in the rotating product-air layer on the deck surface near the hollow side of the housing 1 and prevent the passage of crushed particles into the recess.

Therefore, a cylindrical baffle 13 with a working surface in the form of a toroidal surface at its end is rigidly mounted on the blind side of the body, which, like the plow heap, lifts large crushed particles from the working surface of the deck during their axial movement

and returns these particles in the opposite direction, but closer to the center of rotation of the rotor, than creating favorable conditions for mixing, and consequently, for intensive grinding and evacuation. The particles are lifted by axial forces created by hammers arranged along helical lines. The flow of material into the grinding chamber of the crusher is controlled by a valve or other known means.

Claims (1)

Molotkova crusher formula according to ed. St. No. 1329820, characterized in that, in order to increase the efficiency of the grinding process, the crusher is provided with a hollow 0 five a truncated cone made up of alternating areas of involute and conical shape with a perforation diameter that gradually increases from a larger base to a smaller one and a large base installed at the end of the lattice cheek, on the side opposite to the load, while the gap between the ends of the hammers and the hollow truncated cone decreases along the way material movement, on the side of the body opposite to the load, bumpers with a toroidal working surface are mounted, and the hammers on the rotor are arranged along helical lines with an even screw with a decreasing step in the direction of the bump stops. dl