SU362636A1 - HAMMER CRUSHER - Google Patents

Description

one

The invention relates to the crushing of materials of low and medium hardness with different humidity and can be used in the peat, coal, chemical industry and in agriculture.

Known hammer crusher, containing a housing, inside which there are two shafts with hammers rigidly fixed on them and grates.

The purpose of the invention is to intensify the crushing process and to ensure the removal of adhering material from the grates of the grate.

This is achieved by the fact that the latter are made in the form of rotors consisting of a series of knives interconnected, the axes of rotation of which coincide with the axes of rotation of the shafts, and hammers between the knives, and the knives of one grate are installed in the holes formed by the knives another grate.

FIG. 1 shows schematically the proposed crusher, a cross-section; in fig. 2 shows a section A-L in FIG. one.

The crusher consists of a hopper 7, a corns 2, two shafts 5. And 4 and two grates 5 and 6. The grates are made in the form of rotating on shafts 5 and 4 rotors, consisting of a row of knives 7, rigidly connected to each other at the end

fasteners S, in such a way that gaps are formed between them, from which hammers 5, rigidly mounted on the shafts 3 Vi 4, rotate. The grate bars are mounted so that the knives of one grate enter the inside of the other.

The shaft 4 and the grate 6 are rotated counterclockwise, the shaft o and the grate 5 are clockwise. The grates 5 and 6 have different rotational speeds. The shaft 3 rotates at a higher speed than the grate 5, and the shaft 4 at a faster speed than the grate 6. The ratio of the speeds of the shafts and the grate is chosen depending on the desired degree of crushing of the material.

To eliminate spillage of non-crushed material from the feed hopper / into the body 2, the lower part of the two walls of the feed hopper enters the cavities formed by the grate knives.

The grates 5 and 6, rotating towards each other at lower speeds than the shafts 5 and 4, grab the knives 7 from the bunker / part of the material and feed it into the crushing zone. Due to the difference in the speeds of rotation of the grate, material that has fallen between their blades is previously destroyed. At the same time, hammers 9, rotating with higher speed and

than the grates, the material is additionally crushed. Thus, this hammer mill design allows to combine two processes: the crushing of material and its uniform supply from the bunker to the crushing zone.

With small ratios of the grate speeds 5 and 5 and low speeds of the shafts 5, i.e., with a minimum number of cuttings of the material, it is possible to reduce the degree of its refinement, and hence the specific energy consumption for crushing.

Greater crushing capacity is achieved by moving grates, which significantly increase the size of the crusher output section. With the same thickness of the knives and hammers and certain ratios of their rotational speeds, the maximum size of the crushed pieces will be equal to the thickness of the knives. By changing the speeds of rotation of the grates and shafts, it is possible to change the content of fine particles in the finished mixture. Thus, the proposed crusher allows the degree of crushing to be adjusted over a wide range.

The inner surfaces of the grate knives from the adhering wet material and are cleaned with hammers 9, and the outer surfaces of the knives by their relative movement.

Subject invention

Hammer crusher, for example for lumpy or milled peat, comprising a housing, inside which there are two shafts with hammers rigidly fixed on them and grates, characterized in that

that, in order to intensify the process of crushing and clearing the adhered material of the grates of the grate, the latter are made in the form of rotors consisting of a series of knives interconnected, the axes of rotation coinciding with the axes of rotation of the shafts, and between the knives there are hammers one grate is installed in the holes formed by the knives of the other grate.

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