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As the core component of the vibrating screen, the self-aligning roller bearing of the vibrating screen directly affects the operational stability and service life of the equipment. The following are key precautions when using self-aligning roller bearings for vibrating screens, covering installation, operation, maintenance, and troubleshooting:

1. Precautions before installation

Bearing selection and matching

Select the appropriate type of self-aligning roller bearing based on the working conditions of the vibrating screen (such as vibration frequency, amplitude, and load type), ensuring that its load-bearing capacity, clearance, and speed range meet the design requirements. Priority should be given to using high-precision bearings (such as P5 grade or higher) to reduce vibration and noise, and extend their service life.

Cleaning and Inspection

Thoroughly clean the bearings, shafts, and bearing seats before installation, remove oil stains, iron filings, and other impurities to prevent impurities from entering the interior of the bearings and causing wear.

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Check the appearance of the bearing for cracks, rust, or deformation, rotate the inner and outer rings of the bearing, and confirm their flexibility without jamming.

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Installation Tools and Methods

Use specialized tools (such as hydraulic installation sleeves, heaters) to install bearings, avoiding direct tapping or using hard objects to press in, to prevent bearing damage or deformation.

. During heating installation, the temperature should be controlled at 80-100 ℃ to avoid bearing annealing or seal aging caused by high temperatures. After installation, check the bearing clearance to ensure it meets the design requirements (usually C3 or C4 clearance group to adapt to vibration conditions).

2. Precautions during operation

Lubrication management

Lubricant selection: Select appropriate lubricating grease (such as lithium based grease, polyurea based grease) or lubricating oil according to the working conditions, ensuring that it has good extreme pressure resistance, wear resistance, and high temperature resistance.

. Lubrication cycle: Regularly replenish or replace lubricating grease (usually every 3-6 months) to avoid poor heat dissipation caused by insufficient lubrication leading to dry friction or excessive lubrication.

Lubrication method: Adopt a centralized lubrication system or manually inject oil to ensure that the lubricating grease is evenly distributed to the bearing raceway and roller surface.

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Temperature Monitoring

Install temperature sensors to monitor the real-time operating temperature of bearings. The normal operating temperature should be below 80 ℃.

. If the temperature rises abnormally (exceeding 100 ℃), the machine should be stopped immediately for inspection. Possible reasons may include insufficient lubrication, excessive load, or bearing damage.

Vibration Monitoring

Use a vibration analyzer to regularly detect the frequency and amplitude of bearing vibration, and detect early signs of faults (such as inner ring, outer ring, or roller defects).

. When the vibration value exceeds the reference value (usually 4.5mm/s), further inspection or replacement of the bearing is required.

Load control

Avoid overloading the vibrating screen and prevent the bearings from bearing excessive radial or axial forces, which may cause fatigue damage.

. Adjust the excitation force of the vibrating screen to ensure it matches the bearing capacity.

III. Maintenance

Regular Inspection

Check whether the bearing seals are intact during each shift to prevent dust or moisture from entering the interior of the bearing.

. Check the bearing clearance changes every month. If the clearance exceeds 50% of the initial value, the bearing needs to be replaced.

Sealing protection

Choose wear-resistant and dust-proof sealing components (such as double lip seals), and replace them regularly.

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Install a dust cover or rubber sleeve outside the bearing seat to reduce the impact of the external environment on the bearing.

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Alignment adjustment

Regularly check the installation and alignment of the shale shaker to ensure that the coaxiality error between the bearing pedestal and the shaft is less than 0.1mm, so as to avoid early failure of the bearing due to eccentric load.

Storage and Handling

Unused bearings should be stored in a dry and clean environment to avoid contact with corrosive substances.

. Handle with care during transportation to prevent the shaft from being subjected to impact or collision.

IV. Troubleshooting and Replacement

Common Fault Identification

Abnormal Noise: It may be caused by roller or raceway pitting corrosion, or damage to the cage.

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High temperature: Insufficient lubrication, excessive load, or tight bearing assembly.

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Increased vibration: Defects or excessive clearance in the inner or outer race of the bearing.

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Replacement process

After stopping the machine, thoroughly clean the bearing seat and shaft, check the dimensional accuracy and surface roughness of the shaft and holes.

. Use specialized tools to disassemble old bearings to avoid damaging the shaft or bearing seat. When installing a new bearing, tighten the bearing seat bolts evenly in diagonal order to prevent local stress concentration.

Fifth, precautions for special working conditions

High temperature environment: choose high-temperature resistant lubricating grease (such as molybdenum disulfide based grease) and strengthen temperature monitoring.

. Corrosive environment: Stainless steel or surface coating treatment is used for bearing materials, and corrosion-resistant materials such as fluororubber are used for seals. High frequency vibration: Optimize bearing clearance (such as using C4 clearance group) and strengthen vibration monitoring frequency.