The basic structure of the impact crusher and its working principle

The impact crusher is a highly efficient new crushing device. Giving ore from the feed port 1, and slide down along the feed deck 2, i.e. the oversize ore rotor rotates at high speed hard alloy 45 on the hammer crushed by the dropping process and to high The speed flies in the tangential direction to the first counter-attack 6 so that the ore continues to be broken, and the counter-attack hits the ore again, and then collides with other ore that is pulled out behind the rotor, so the ore is received in the first crushing chamber 7. It was broken by repeated shocks. After the first crushing chamber is broken to a certain particle size, some ore is discharged into the second crushing chamber 8 through the gap between the counter-plate 6 and the rotor 4, and continues to be repeatedly struck until the particle size becomes smaller and then discharged from the bottom of the crusher. The mouth is discharged.

It can be seen from the above that the work of the impact crusher is to break the ore by the impact principle, which can be expressed by the following two formulas.

The kinetic energy obtained from the ore: The impact of the ore:

Where m is the mass of the material being crushed, in kilograms;

U——the circumferential speed of the rotor, m/s;

U2——the speed after the material block is struck, m/s;

U1——the speed before the material block is struck, m/s;

t - action time, seconds.

It can be seen from the above formula that the counterattack force is inversely proportional to the action time, and is proportional to the acceleration of the nugget. The kinetic energy of the block is proportional to the square of the rotor velocity and the mass product of the mass.

The main advantages of the impact crusher are:

(1) The construction of the single cylinder, small volume, light weight, large production capacity, so the production cost is low;

(2) The ore is broken along the joint surface, so the power consumption is low and the efficiency is high;

(3) crushing ratio up to 40, the cartridge can be of the crushing process, can break into two or three sections of a broken, reducing the cost of equipment mineral processing plant;

(4) It has a selective crushing effect, and the material of the crushed product is relatively uniform, and the shape is mostly a cube.

The biggest drawback of the impact crusher is that the hammerhead and the counterattack plate wear faster.

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