The vibrator is an important part in shale shaker, no matter in VSM shaker or brandt shaker . It is a device that applies to vibration power and vibration shaker bed. The vibrator is a kind of special motor which is set for the vibration. At the same time it contains the full range of forces, which can provide energy to rotary motion using a set of eccentric motor. It will generate the appropriate linear motion and reversed rotates.
The shale shaker vibrator has various types. The most common types are three types that are electric ones, magnetic ones, and electric hydraulic ones. In addition, there are small piezoelectric vibrator with thin-walled structure, high frequency vibrator and high-intensity vibrator and so on. Then I will introduce the most common shale shaker vibrator to you in the following article.
The electric shale shaker vibrator moves by using magnetic force of charged conductor, which is generated in the magnetic field. When the excitation force supplies with DC current, it will generate an intense and constant magnetic field in the annular air gap of the magnetic circuit. The signal generator produces an alternating signal, which is magnified by the amplifier. It is inputted into the coil and generates an alternating force in the magnetic field, which can make a movable system move. There are several characteristics of electric shale shaker vibrator. The frequency range is wide. Lower limit is between 1Hz and 10Hz, while higher limit can be more than ten thousands Hz. The output force is large, which is very easy to adjust and control it. It’s very convenient to operate and it can achieve a variety of wave vibration. The cost is high.
When you vibrate the large-scale structure, you would need large vibration force in order to obtain larger response. At this time you can use the electric hydraulic shale shaker vibrator. It has several features. Due to the compressibility of oil and adjusting the friction of oil, the high frequency character of the electric hydraulic vibrator is weak. It generally applies to the lower frequency range, which is typically from a few tenths Hz to hundreds Hz. The waveform is worse than the electric vibrator’s. In addition, its structure is complex, so the precision of manufacture is high. It also needs a set of hydraulic system, which will cost a lot.
The electromagnetic shale shaker vibrator directly uses the electromagnetic force as vibration force. It commonly used in non-contact vibration occasion, especially for the vibration with rotating parts. The alternating signal with a certain frequency inputs the coils wound on the iron core after it is magnified by the amplifier. At this time the electromagnetic shale shaker vibrator forms an alternating magnetic field near the magnetic poles. The test object in the magnetic field is attracted by alternating suction.
In conclusion, different shale shaker vibrator has different features and principles. After learning the principles and the features of the most common shale shaker vibrator, you can choose proper types according to your actual demands.
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