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The Research and Analysis of the Crushing Force of Gyrotary Crusher

The crushing force is the basis for determining the power of the electric motor and calculating the strength of the spare parts of the crushing machine, for this reason, it is important to gain a precise crushing force. The calculation of the crushing force of the gyrotary crusher can base on the workload of crushing chamber, also on the power of the electric motor. After comparing the calculation results with the actual materials data, the final result can be determined.

Through the materials pure-lamination experiment, the lamination crushing curve of various materials can be gained. It is analyzed that the changing law of the curves are similar. The crushing process of the materials can be seen as three stages: temporary lamination crushing, impacting crushing and grinding. As a matter of fact, during the crushing process, the large materials will become small; the volume of the crushing chamber will increase. For this reason, the crushing force increases significantly due the crushing amount of the materials.

As for the gyrotary crusher, after going into the crushing chamber, the materials constantly fall down to the materials discharging mouth under the crushing effect and finally are discharged out of the discharging mouth. Inside the crushing chamber, during the process in which the large materials are crushed into small ones, the volume of the materials will increase gradually, and the width of the crushing chamber will gradually decrease so that the gap between the materials will also decrease, so that the compacting degree of the materials also gradually increase.

In addition, due to the crushing effect of the movable cone, the materials are in a compacting state and the gap rate will reduce. In this way, the bigger the stroke of the movable cone, the bigger compacting degree will be. To conclude, it can be said that the unit crushing force of the crushing chamber is in a negative proportion to the width of the crushing chamber but in a positive proportion to the stroke of the movable cone.

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