Two shapes and three fixing methods of the impact crusher

Project Background

The hammer is an important part of the impact crusher. When the material enters the action area of ​​the hammer

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Two shapes and three fixing methods of the impact crusher

The hammer is an important part of the impact crusher. When the material enters the action area of ​​the hammer, it is broken by the high-speed impact of the hammer and is thrown to the counter-attack plate installed above the rotor to break again, and then from the counter-liner. Pull back to the hammer action area to re-break. It can be seen that the hammer has direct contact with the material. The shape and fixing of the hammer have a certain influence on the crushing. This article mainly introduces the two shapes of the hammer and three fixing methods.

First, the two shapes of the hammer

At present, the shape of the hammer in the market is mostly divided into two types, one is a linear hammer and the other is a crescent hammer. The crescent-shaped hammer is more advantageous because it can ensure the vertical impact of the material, the impact force is larger, and the crushing efficiency is high. Moreover, the impact surface is also larger and more durable than the linear hammer.

Second, the plate hammer fixed way

The hammer is fixed on the rotor in the impact crusher. There are three ways to fix the hammer:


The hammer is axially inserted into the corresponding slot of the rotor from the side of the rotor. In order to prevent axial sway, the two ends are positioned by the pressure plate. Since the fastening bolts are removed, the reliability of the hammer operation is improved. The centrifugal inertial force generated when the hammer is rotated and the reaction force during impact crushing are self-locking, and the rotor is easily replaced by a wearable structure, so that the loading and unloading is simple and easy to manufacture. However, the bolt is exposed on the striking surface, which is extremely liable to damage, and the bolt is subjected to a large shear force, and once it is cut, it will cause a serious accident.

The hammer is inserted into the groove of the rotor from the side, and the two ends are pressed by the pressure plate. However, the fixing method makes the hammer difficult to be firm, and the hammer is easy to loose during work. This is because the hammer is required to be manufactured and processed with high manganese. Alloy materials such as steel are not easy to process.

The wedge is used to fix the hammer on the rotor. Under the action of centrifugal force, the fixing method can ensure the faster the rotor speed, the firmer the plate hammer is fixed, and the work is reliable, and the replacement is convenient. This is a good way to fix the hammer, which is used in various countries. The wedge is made of cast steel and has certain toughness and plasticity. It has high strength and hardness and good machinability.

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