On the vibration problem of the card free rotary cutting machine

In the working process of the card free rotary cutting machine, if the mechanical vibration noise, for the unbalanced weight of the rotor, produces a certain number of revolutions of vibration, we will have a specific understanding.

The rotation of the motor bearing will produce natural sound normally, and there will be almost no problem except for the case of precision small motor or high-speed motor. However, the natural vibration of the bearing and the resonance of the material of the motor components, the axial spring constant of the bearing makes the rotor vibrate in the axial direction, the lubrication is poor, and the friction sound may occur. In case of DC motor or commutator motor with brush, brush noise will be generated. The electromagnetic noise is the noise produced by unbalanced magnetic force of magnetic circuit and electromagnetic force wave of air gap.

In addition, there are fluid noise, fan or rotor caused by ventilation noise, it is difficult to avoid the motor, in addition to the fan blade or iron core teeth caused by a flute sound, it is also necessary to pay attention to the resonance in ventilation.