The emergence of vibrating motors simplifies the structure of vibrating machinery. Many new vibrating machines have been produced by using a variety of vibration forms. More importantly, it simplifies the design method and design process of vibrating machinery. Vibration machinery is getting more and more in all walks of life to get a wide range of reasons, so what is the vibration motor, what is its working principle?
The vibrating motor is equipped with a set of adjustable eccentric blocks at both ends of the rotor shaft, and the centrifugal force generated by the high-speed rotation of the shaft and the eccentric block is used to obtain the exciting force. The combination of the specially designed motor and the eccentric block makes the motor rotate. The eccentric mass generates excitation force transmitted to the vibration machine through the motor. The vibration motor only needs to adjust the outer eccentric block to form a certain angle with the inner eccentric block, so that the excitation force can be adjusted steplessly. The vibration motor can generate different vibration trajectories according to different installation combinations on the vibrating body, thereby effectively completing various operations. Similar to another vibration source vibrator of a vibrating machine, if a single vibrating motor is installed, a circular motion or an elliptical motion trajectory will be generated; if two identical models of the same speed but opposite steering are installed, a linear motion will occur. Track; it is also possible to use two different types of vibration motors with different speeds and different speeds to generate composite vibration trajectories. Generally, there are two types of dual-frequency composite and double-width composite. For example, two vibration motors are divided into the feeding end and the discharging end of the screening device, so that the feeding end exhibits large amplitude and low frequency vibration, and the discharging end exhibits small amplitude and high frequency vibration, and the middle of the screening machine overlaps. Two kinds of vibrations make the screening machine play a more effective screening effect.
Vibration motor features:
1. The vibration force and power are properly matched, the vibration force is large, the body weight is light, and the volume is small.
2. Since the vibration motor is a strong resistance type vibration rather than resonance, it has a stable amplitude.
3. The vibration is generated due to the smooth rotation, and the noise is low.
4. The vibration frequency range is large. The vibration frequency of the ordinary vibration exciter is fixed, generally equal to the power frequency, and the vibration frequency of the vibration motor can be adjusted by adjusting the rotation speed, and the vibration frequency and amplitude can be arbitrarily selected according to different purposes.
5. Long service life, bearing life of 2 poles up to 5000 hours, 4, 6, and 8 poles up to 10,000 hours.
6. Due to the small influence of power supply fluctuation, the ordinary exciter will cause a large change in the exciting force due to the voltage change, but in the vibration motor, this change is very small.
7. Multi-machine combination, self-synchronization can be achieved to complete different process requirements.
8. The direction of the exciting force can be changed according to the way the vibration motor is installed.
9. Only by adjusting the angle of the eccentric block, the excitation force and amplitude can be adjusted steplessly to meet the requirements of various working conditions.
10. Maintenance is simple. Since the spring is not used like the electromagnetic type, maintenance work such as gap adjustment and weight adjustment can be dispensed with, and only the bearing needs to be repaired regularly.
11. The machine is rich in variety and complete in specifications, which can meet the working needs of all kinds of vibration machinery.
It can be seen that the selection calculation of the vibration motor is greatly simplified compared to the conventional electromagnetic vibration exciter.
However, with the continuous development and advancement of the vibration machinery itself, the requirements for the supporting excitation source are also constantly improved. If the excitation force can be simplified, the structure of the excitation source can be simplified to the utmost, and the daily maintenance and repair can be reduced. The cost will bring another revolution in the development of vibration machinery.
