VISTA Technology Knowledge: Improvement of Motor Bearing for Vertical Shaft Crusher

The improvement of the motor bearing of the vertical shaft crusher ensures the operation rate of the equipment and improves the economic benefits of the enterprise

In order to reduce the particle size of grinding materials, increase the hourly output of ball mill and reduce power consumption, most cement enterprises have selected vertical shaft crushers in recent years, some for limestone crushing, some for clinker crushing, and others for mixture and coal crushing. This crusher has indeed played a great role in the production process, but since most of the power is ordinary horizontal motor, we have made improvement tests through practice, Satisfactory results have been achieved.

The installation mode of ordinary motor is horizontal. The design and manufacture of vertical motor and horizontal motor are different. In addition to the difference of assembly type, the model selection of bearing is also different. Several models and vertical crushers from several manufacturers are used in our factory. Most of the supporting horizontal motors are assembled vertically. Some faults occur through operation. The main source of the fault is that the motor gravity runs downward for a long time, which speeds up the wear of the bearing, changes the position of the motor rotor during assembly, and the rotor moves downward, which makes the motor stator core and rotor core not on the same plane, In this case, the induced electromotive force of the motor also changes, which makes it difficult for the motor to start, the current increases and the power consumption increases. In serious cases, it causes the motor to "sweep the hall", burn the stator winding, increase the maintenance cost and affect the production.

In order to improve the operation rate of the equipment and increase the economic benefits of the enterprise, the above supporting ordinary horizontal motor is experimentally improved. The method is to install a closed thrust bearing at the lower end of the motor shaft and the outside of the inner fan, fix the thrust bearing seat with the equipment foundation, and ensure the concentricity of the motor rotor remains unchanged. Through on-site operation, this method completely solves the problem of bearing wear down by the gravity of the motor and ensures the operation rate of the equipment, It improves the economic benefits of the enterprise.

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