Principle feeder is relatively simple, as long as the master of its work and structure theory, under the theoretical guidance, combined with practical experience will be able to maintain good electromagnetic vibrating feeder maintenance and debugging.
Electromagnetic vibrating feeder is a more complete dual particle orientation forced vibration of elastic systems. The entire system is operating in a low critical resonant state, it structure is simple, stable, low power consumption, are widely used in the cement industry, but for now the use of some units, the more common are improper maintenance, work status is unstable, use Transmission capacity after a period of decreased materials and other issues. Plus after maintenance not correct debug, cause poor job stability device, seriously affected the normal production.
A. Installation
1. The electromagnetic vibrating feeder series electric vibrator are suspended installations, which vibrator hanging hanging hanging stalks should be vertical, in order to reduce lateral swinging eh feeder, the feeding trough boom suspension should open outwards 10 ° arrangement. 4 suspension hanging stalks should be hanging in the structure can have sufficient rigidity for large feeder chute for easy maintenance and replacement, should be arranged to move the carriage.
2. When installing generally do not dismantle the installation, after the installation of around feeder should be a gap of swimming, so the feeder in a free state.
3. After installation of the feeder lateral shall be horizontal, offset to one side in order to avoid material feeder work.
4. Press the control wiring schematics, and ground protection.
5. After installing coupling bolts feeder fork when maintenance must be released before commissioning use, then nut.
Two debugging
Electromagnetic vibrating feeder adjustment, commissioning mainly to adjust the gap of the electromagnet core, dual-particle connection to adjust the spring plate group, debugging.
1. electromagnet core and the air gap between the armature tuning
Electromagnetic vibrating feeder in the core and the size of the air gap between the armature directly affect the normal operation of the feeder, as adjusted properly, light current is increased, the amplitude is reduced and can not operate normally, severe collision will produce core The cause damage core and coil. Therefore, regular inspection and adjustment of the air gap is an important condition to ensure the operation. Air gap adjustment method: When adjusted using a screw connection overhaul fork position, you can begin to adjust the size of the air gap, the air gap is generally adjusted to about 1.9 ~ 2.2mm, in order to facilitate the adjustment can be made in a few standard plug before adjusting block, When this adjustment can be adjusted directly plug block. Finally, add some must be tightened and the locknut.
2. Double dot connecting spring adjustment plate group
The amplitude of the trough there are two factors: First, to the size of the feeder electromagnetic excitation force and frequency; second feeder own natural frequency. According to the principle of mechanical resonance vibration known, and only when and to the natural frequency of the excitation frequency electromagnet feeder near resonance, the maximum amplitude of the trough. Select the tuning values are generally in the range of 0.85 to 0.9. Work Practice has proved that when the value is lower than the tuning range value, to decrease transmission capacity feeder, smaller amplitude. Above this range of values, to work in an unstable state feeder range. Joint stiffness tuning value is set by adjusting the spring board to adjust the double dot.
Adjustment double dot spring plate group: The whole adjustment to the end of the air gap adjustment, you can begin to adjust the stiffness of the spring plate group. Loosen the maintenance screw, turn the control power, a gradual increase in the operating current of the same time, to observe the indicated value provided in the signs of the amplitude of the electromagnetic vibrating feeder. When the current reaches the maximum value, and the amplitude reach the maximum, may be the top spring plate set screws slightly loose, this time as the amplitude increases, the work of the current decline, then the spring rate is too large, should reduce reed number of blocks to reduce stiffness. Instead the number should be increased to enhance the overall stiffness of the leaf spring. Repeatedly carefully adjust short as long as you can achieve optimum tuning values.
The role is to determine the amplitude of vibration signs point vibration amplitude, the measured value is the amplitude value cut-off point of two lines.
Three maintenance
Routine maintenance generally use look, listen to understand the operational status of equipment. Look that is by observing the amplitude of the signs indicative value, combined with the operating current, the working status of electromagnetic vibrating feeder to make comprehensive judgments. Listen through the sound feeder operation is to determine the overall tightness of parts of the core gap is normal.
1. feeder such as for ingredients, when dosing, in order to ensure a uniform and stable feeding, to prevent the material gravity should be installed horizontally, such as general material continuous feeding, can be installed at 10 ° tilt. For viscous materials and materials with large water content can be installed at 15 ° tilt.
2. After installing the feeder gap of 20mm should be left swimming transverse shall be horizontal, suspension with flexible connections.
3. Front air test, all bolts should be strong again, especially vibration motor bolt, 3-5 hours of continuous operation, should be re-tightened once.
4. test, two vibration motor must reverse rotation.
5. Give during operation should always check the material amplitude stability, current and noise, abnormal should be promptly stop treatment.
6. The motor bearings once every two months filling lubricants, high temperature lubricants season should be filling a month.
