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Roller Crusher
Working Principle of Double (Pair) Roller Crusher
The double (pair) roller crusher is a type of roll - type crushing machine that operates based on a relatively straightforward yet effective principle to crush various materials.
1. Power Transmission
The crusher is typically powered by an electric motor. The motor's power is transferred to the pulleys through a V - belt or a coupling. These pulleys are connected to the shafts of the two rollers. As the motor rotates, it drives the pulleys, which in turn cause the two rollers to rotate. The two rollers usually rotate in opposite directions, which is crucial for the crushing process.
2. Material Feeding
Materials to be crushed are fed into the crusher from the top - side feed hopper. The feed hopper is designed to ensure a steady and even flow of materials into the space between the two rollers. The size of the feed materials should generally be within the specified feed particle size range of the crusher, which is usually ≤150 mm for many double roller crushers.
3. Crushing Process
Extrusion and Shear Forces
Once the materials enter the space between the two rotating rollers, they are subjected to a combination of extrusion and shear forces. The two rollers are fixed with high - strength wear - resistant alloy rolls. Their relative rotation generates high extrusion pressure. As the materials are squeezed between the rollers, the extrusion force breaks the materials into smaller pieces. At the same time, the difference in the rotational speed and the surface characteristics of the rollers also create shear forces. These shear forces further contribute to the crushing of the materials by cutting and tearing them apart.
Tooth - Shape Adaptability
In some double roller crushers, the tooth shape, size, and arrangement on the rollers can be adjusted according to the properties of the materials. This adaptability allows the crusher to better handle different types of materials, whether they are hard or soft ores. The teeth on the rollers can grip the materials more effectively, enhancing the crushing efficiency.
4. Discharge and Size Control
Discharged Materials
After being crushed, the materials are pushed rotatorily by the rollers and fall out from the bottom of the crusher. The crushed materials are then transported away by the subsequent conveying equipment for further processing or use.
Size Adjustment
The spacing between the two rollers can be adjusted to control the size of the discharged materials. There are usually wedge or gasket adjusting devices arranged between the two rollers. For example, in a wedge - type adjusting device, there is an adjusting bolt at the top. When the adjusting bolt is turned, it can pull up the wedge, which then moves the movable roller away from or towards the fixed roller. By changing the distance between the rollers, the desired particle size of the discharged materials can be achieved.
5. Self - Protection
Some double roller crushers are equipped with a self - protection function. When hard materials such as metals enter the crushing cavity, the crusher components can self - protect to avoid damage. For instance, the rollers may be able to withstand a certain impact force or the crusher may have a mechanism to detect the abnormal situation and stop the operation to prevent serious damage.
In summary, the double (pair) roller crusher uses power transmission to drive the rotation of two opposite - rotating rollers, applies extrusion and shear forces to crush the materials fed between the rollers, and can adjust the discharge particle size through the roller spacing adjustment mechanism, all while having certain self - protection capabilities.
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Chaoyang Longrui Equipment Technology Co.,Ltd.
Address: Chaoyang City, Liaoning Province,P.R China
Telephone: +86-421-3303155
Mobile: +86-188 1315 0461
Whatsapp: +86-188 1315 0461
