Maintenance and Causes of Burning in Vibrating Screen Motors

The vibrating screen motor is a distinct component, separate from the screen body and other parts. If damaged, it cannot be replaced immediately, which will impact the operating efficiency of the vibrating screen. Therefore, mastering the maintenance and repair of the vibrating screen motor is essential.

1. Maintenance of Vibrating Screen Motor

To ensure normal operation and extend the service life of the vibrating screen motor, daily maintenance is essential. The more diligent the routine upkeep, the greater its effectiveness. This forms the foundation for maintaining stable performance in vibrating screen motors.

1) Ensure Proper Axial Clearance in Vibration Motor Bearings

After high-speed operation, bearings heat up and expand. Maintaining appropriate axial clearance ensures that bearings function correctly after thermal expansion, preventing motor burnout.

2) Correct Adjustment of Eccentric Blocks

Since production volumes often fluctuate significantly over time, the excitation force of the vibration motor can typically be adjusted by changing the angle of the eccentric blocks. When doing so, pay close attention to the inner eccentric block’s axial position. The included angles between the outer eccentric blocks at both ends and the inner eccentric block must remain identical; otherwise, incorrect excitation forces may result, potentially damaging the vibrating screen.

3) Ensure Proper Lubrication of the Vibration Motor

Maintaining optimal lubrication for the vibrating motor requires regular grease replenishment, typically performed every two weeks.

4) Schedule Regular Shutdowns for Maintenance

After prolonged operation, internal components of the vibrating motor may age and become unsuitable for continued use, primarily due to bearing wear. Additionally, dust accumulation within the motor during this period necessitates thorough cleaning.

2. Causes of Vibration Motor Burnout

Inadequate daily maintenance combined with long-term overload operation can lead to vibration motor failure, most commonly resulting in burnout. Several factors contribute to this issue.

1) Loose Anchor Bolts

The high-frequency rotation of the vibrating motor generates significant excitation force and frequency. Over time, anchor bolts inevitably loosen. If one bolt becomes loose, it affects the others. In severe cases, a broken bolt can cause the motor to burn out.

2) Improper Motor Installation

This issue primarily concerns horizontal vibration motors. Since these motors lack flat bearings, they must be installed horizontally. Inclined or vertical installation causes the bearing to support the weight of the eccentric block, leading to motor burnout.

3) Improper adjustment of the eccentric block

This issue stems from the inconsistent angle settings mentioned above.

4) Inadequate sealing

If the motor is not properly sealed in harsh working environments, excessive dust ingress can cause friction, leading to motor burnout.

5) Direct sun exposure

When the vibrating motor is exposed to intense sunlight, its temperature will inevitably rise, potentially causing the motor to overheat and fail.

The vibrating screen motor serves as the power source for the entire screening system and significantly impacts the screening efficiency under specific conditions. Therefore, regular daily maintenance of the vibrating screen motor is essential.