The importance of impact crusher hammers and impact plates

China chemical machinery and equipment network, is that the impact crusher belongs to a new type of rate crushing equipment, it has such characteristics, that is, small size, simple structure, large crushing ratio, low energy consumption, large production capacity, uniform product size, and selective crushing effect. The biggest disadvantage of the impact crusher is that the plate hammer and the impact plate are very easy to wear, especially in the crushing of hard ores, this wear will be more serious, so it needs to be replaced often.

The main working part of the impact crusher is the plate hammer, which is made of wear-resistant and impact-resistant material, and there are many types of structural types of the plate hammer. The fixing of the plate hammer on the rotor must be reliable, otherwise it will cause the plate hammer to loosen and then form an impact, and if the plate hammer falls off from the rotor, it will lead to serious accidents.

The following are several fixing methods of the plate hammer: the screw fixing method of the impact crusher is to use the screw to fix the plate hammer on the rotor, the fixing method is relatively simple, however, the degree of reliability is low, the head of the screw is easy to be damaged, and it is not convenient to dismantle and replace the plate hammer. Pressure plate fixing method, that is, the plate hammer from the side of the rotor into the groove of the rotor, both sides of the groove have a certain slope, relying on the centrifugal force generated by the work of the plate hammer to be fastened, the plate hammer ends also have to be pressed with the pressure plate, in order to prevent the plate hammer tampering. Wedge fixing method, is the plate hammer into the rotor groove, from the rotor side to the two sides with the slope of the wedge into the wedge to wedge the plate hammer. When the hammer is under the action of centrifugal force, the hammer, the wedge iron and the rotor body will turn tighter and tighter, and its work is reliable, but this structure is more difficult to dismantle and install during the period.

Impact plate belongs to one of the main working parts of impact crusher equipment, its shape and structure, the impact on the performance of the crusher is quite huge. The impact plate is made of wear-resistant and impact-resistant material. In order to get a better crushing effect, the stone should collide with the impact plate vertically, in this way, the impact energy can be utilised to a greater extent, and there is no sliding between the rock and the impact plate, which reduces the wear and tear of the impact plate. For this reason, the shape of the impact plate of the impact crusher presents an involute shape, however, the involute shape of the impact plate is not easy to manufacture, so most of the use of arc-shaped to be replaced. Folding line-shaped impact plate has a simple structure and is easy to build, but the impact effect is not as good as that of the involute shape. Arc-shaped impact plate is mainly used in coarse crushing, folding line-shaped impact plate can be used for coarse or medium crushing, arc-tooth-shaped impact plate is mainly used for fine crushing.

When the electric motor drives the impact crusher, the rotor will rotate at high speed, the material enters into the plate hammer action area and crushes with the plate hammers on the rotor, and then it is thrown to the impact device to crush again, and then it is bounced back to the plate hammer action area from the impact liner to re-crush again, and the process repeats itself, the material enters into the first, second, and third impact chambers from big to small to repeat the crushing until it is crushed to the required granularity, and then it is discharged from the discharge port, and the gap between the impact frame and rotor can be changed to change the material discharge size and material shape. Adjusting the gap between the counterattack frame and rotor can achieve the purpose of changing the granularity and shape of the material.

Stone from the upper part of the machine directly into the high-speed rotating turntable, under the action of high-speed centrifugal force, and the other part of the umbrella-type way of diversion in the turntable around the high-speed collision of flying stones, resulting in high-density crushing, stone striking each other, in the turntable and the casing of the vortex between the formation of the movement, resulting in a number of mutual strikes, friction, crushing, from the lower straight through the discharge to form a closed-circuit cycle of many times, and by the control of screening equipment to achieve the required particle size. The required granularity is achieved by the screening equipment.