Vibration motor common causes of failure and maintenance methods

Posted by uuuseff on November 15th, 2019

A: common problems in the use of large-scale vibration motor We all know that the vibration of the vibration motor is because the vibration motor is installed at both ends of the rotor shaft adjustable eccentric block, the use of high-speed shaft and eccentric centrifugal force generated by rotation Exciting force. Well, the larger the motor, the greater the exciting force, the stronger its own damage to the vibration. Large-scale vibration motors, ordinary bolts can not be completely fixed all parts of the vibration motor connection, and easily appear off phenomenon. Produces uneven vibration. Large-scale vibration motor mainly to 6-based motor, low frequency, high amplitude. High-frequency vibration motor is mainly small and medium sized vibration motor, so the use of manufacturers in the choice of motor, if you need a relatively large frequency of the motor, it is recommended to use a few more hanging medium-sized motor to improve vibration. Second: vibration motor common troubleshooting approach 1, the boot, the motor does not start, you should check: 1) power phase is missing; 2) motor is phase; 3) protective cover is damaged and friction eccentric block; 2, Motor noise, fever, etc., should check: 1) Vibration machinery and motor foot contact surface roughness meets the installation requirements; 2) Whether the ground screw bolt is tightened; 3) The host vibration acceleration meets the requirements; 3, Adjust the eccentric block, the amplitude changes abnormally, you should check: the eccentric shaft at both ends of the block is symmetrical adjustment; 4, two vibrating motor at the same time the vibration equipment, when the phase does not meet the requirements, be sure to tune it Phase sequence, do not adjust the total phase sequence of the two vibration motor power supply. Three: Vibration motor frequent trip several reasons 1. Vibration motor air switch, over-current protection capacity does not match or aging. 2. Vibration motor outlet cable broken skin. 3. Vibration motor circuit performance decline, causing the current is too large. 4. Bearing damage or lack of fuel jam, resulting in overload trip. Vibration motor power problems or circuit breaker aging. Maintenance of common sense: maintenance and overhaul of vibration motor method First, the operation of the maintenance matters: Most of the vibration motor installed in the harsh working environment, large dust, the motor itself has no fan cooling, thanks to natural cooling, in use except with ordinary Motor maintenance, there is also pay attention to maintain the content. (A), check the contents: 1, regular inspection of the motor surface health 2, the timely removal of dust when the impact of heat 3, always check the motor is not fixed to the anchor bolts 4, loose torque wrench to torque required 5, check the vibration Is abnormal (B), treatment: 1, abnormal vibration shutdown, disassemble eccentric cover inspection 2, eccentric block seal is tight 3, sealing is not strict stop processing 4, the motor outlet cable is worn 5, If the wear and tear, stop processing 6, the bearing is short of oil 7, the operation every 2 months with a grease gun make up oil once a year in repair 8, the motor current is normal 9, downtime inspection and treatment II, maintenance matters: 1 , Vibration motor outlet cable to withstand vibration, so to use more flexible cable for the motor lead, the general motor lead in the motor outlet root easily broken or worn damage, in the event of such failure to open the motor, re-start from the motor wiring. 2, vibrating motor bearings to use heavy-duty bearings, can carry a certain axial load, regardless of the installation direction, the bearing life is not affected by the axial load. 3, When disassembling the bearing, record the position of the eccentric block and the percentage of exciting force. After replacing the bearing, check that the shaft of the motor should have certain axial series, first, do not install the eccentric block to test the motor, after running normally Reset the eccentric block according to the original record. 4, eccentric block protective cover to be sealed, to prevent dust from entering the interior, affecting motor operation. In short, the vibration motor has certain destructive equipment, vibration motor is also vulnerable equipment, not only when the motor is not shortened life expectancy, the mechanical equipment dragged also caused great damage, so the use of vibration motor Must be strictly in accordance with the instructions for the use of vibration motor to increase the frequency and intensity of inspection, detection of hidden dangers after the timely manner, must not be sick to maintain operation. Reasonable use, diligent inspection in order to better play the role of vibration motor, vibration motor can extend the service life. Vibration motor excitation force adjustment method is too small Vibration motor excitation force is too small vibration machine users often encounter problems, how to solve this problem yet. In fact, the vibration motor factory vibration were adjusted to 80%, the need to sea (export) excitation force adjusted to 0%. Use the following steps to adjust: 1, horizontal vibration motor: (1), relax the cover fastening screws, remove both ends of the shield; (2), the excitation force is less than MV50-2, MV50-4, MV50-6, MV30-8 vibration motor (does not include these four specifications), the outer eccentric block is adjustable block, the surface is equipped with a mark indicating the maximum percentage of excitation force, the eccentric block is a fixed block, are used to fasten Bolt pressed on the motor shaft. Both ends of the shaft are engraved with a reference line. Unscrew both sides of the outer eccentric block compaction bolts, both sides of the outer eccentric block rotates in the same direction so that the shaft alignment outer eccentric block on the excitation force scale engraved lines, adjusted to the required excitation force, tighten the outer eccentric (3) vibration motor greater than or equal to MV50-2, MV50-4, MV50-6, MV30-8 of the vibration motor (including these four specifications), the outer eccentric block is fixed Block, with key fixed on the shaft, can not rotate. The inner eccentric block is an adjustable block, and the outer surface is equipped with a scale that indicates the percentage of the maximum excitation force. The fastening bolt is used to press the motor shaft. Unscrew both sides of the eccentric block compression bolts, the two sides of the eccentric block rotates in the same direction, so that the inner eccentric block on the excitation force scale score aligned with the outer eccentric block on the slit, adjusted to the required excitation force, Note: In addition to special applications, the position of the eccentric block at both ends of the vibration motor shaft must be corresponding, the percentage of the eccentric block at both ends must be set equal, otherwise vibration motor will produce Huge wrong excitation force, damage motor vibration machinery. 2, vertical vibration motor: (1) the excitation force adjustment: remove the additional block compression bolts, by increasing or decreasing the number of additional blocks to adjust the excitation force; (2) the upper and lower eccentric block angle adjustment: The eccentric block is a fixed block, the lower eccentric block is adjustable block, are fastened with bolts fastening the motor shaft. The two ends of the shaft are engraved with a reference line. The outer surface of the lower eccentric block is provided with a scale for indicating the rotation angle. Loosen the lower eccentric block and tighten the bolt, and turn the lower eccentric block so that the angle scale on the lower eccentric block is aligned with the reference mark of the rotary shaft Line, adjusted to the desired angle, tighten the lower Eccentric compression bolts; To adjust the angle of the eccentric block can also be adjusted accordingly. 3. Connect the power Vibration motor out of the cable to withstand vibration, so should be used heavy four-core cable, near the cable outlet is not allowed to suddenly bend, to have a greater than the cable diameter 8-9 times the bending radius, and then the cable Secure to a stationary machine or frame. The distance is about 0.6 meters to 0.9 meters. In the fixed cable clamp should be padded with a soft insulating material, so as not to damage the cable friction. Four-core cable grounding wire, one end of the junction box with the ground screw connected to the Other end must be grounded. Small vibration motor, there is no junction box on the case, the use of heavy three-core cable directly from the motor wiring. Place the grounding screw near the foot of the motor and use it securely. Note: Vibration motor outlet cable is wearing parts, often due to vibration and friction damage, leading to motor phase loss

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