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Reasons and solutions for abnormal bearings of grain conveyor

Reasons and solutions for abnormal bearings of grain conveyor:

Firstly, the sound of the grain conveyor retainer is "sigh sigh sigh sigh sigh sigh sigh sigh sigh sigh sigh sigh sigh sigh sigh sigh sigh sigh sigh sigh sigh sigh sigh sigh sigh sigh sigh sigh sigh sigh sigh sigh sigh sigh sigh sigh sigh sigh sigh sigh sigh sigh sigh sigh sigh sigh sigh sigh sigh sigh sigh sigh sigh sigh sigh sigh sigh sigh sigh sigh sigh sigh sigh sigh sigh sigh sigh sigh sigh sigh sigh sigh sigh sigh sigh sigh sigh sigh sigh sigh sigh sigh sigh sigh sigh sigh sigh sigh sigh sigh sigh sigh sigh sigh sigh sigh sigh sigh sigh sigh sigh sigh. Solution: 1. Improve the precision of the retainer; 2. Select bearings with small clearance or apply preload to the bearings; 3. Reduce torque load and installation errors; 4. Choose good fats and oils

2. Continuous buzzing sound "buzzing...":

Cause analysis: When the motor runs without load, it produces a sound similar to a buzzing sound, and the motor experiences abnormal axial vibration, with a "buzzing" sound when turned on or off.

. Specific characteristics: Poor lubrication status of multiple motors, and multiple motors with ball bearings at both ends in winter. This is mainly caused by unstable vibration under the influence of axial vibration when the shaft alignment performance is poor. Solution: 1. Use grease with good lubrication performance; 2. Add preload to reduce installation errors; 3. Select bearings with small radial clearance; 4. Improve the rigidity of the motor bearing seat; 5. Strengthen the centering of bearings. Note: The fifth point plays a fundamental role, using 02 small groove curvature and 01 large groove curvature

III. Paint Rust:

Cause Analysis: Due to the drying of the motor bearing casing paint oil, the volatile chemical components corrode the end face, outer groove, and groove of the bearing, causing abnormal noise in the groove after corrosion.

. Specific features: After being corroded, the surface of the bearing rusts more severely than the surface. Solution: 1. Assemble the rotor, casing, and air dry or dry them; 2. Reduce motor temperature; 3. Select the appropriate paint model; 4. The ambient temperature at which the motor bearings are placed; 5. Using suitable fats and oils, grease can cause less rusting, while silicone oil and mineral oil can easily cause it; 6. Adopting vacuum impregnation paint process

4. Impurity Sound:

Cause Analysis: It is caused by the cleanliness of bearings or grease, emitting an irregular abnormal sound.

. Specific features: The sound is occasional and irregular, with varying amplitudes and amplitudes, and is more frequent on high-speed motors. Solution: 1. Choose good fats and oils; 2. Improve the cleanliness before grease injection; 3. Strengthen the sealing performance of bearings; 4. Improve the cleanliness of the installation environment

V. High frequency, vibration sound "dada...":

Specific characteristics: The sound frequency changes with the bearing speed, and the surface waviness of the parts is the main cause of noise.

. Solution: 1. Improve the surface machining quality of the bearing raceway and reduce the amplitude of the corrugation; 2. Reduce collisions and injuries; 3. Correct the clearance preload and fit, check the operation of the free end bearing, and the accuracy installation method of the shaft and bearing seat

6. Temperature rise: Specific characteristics: After the bearing is running, the temperature exceeds the required range. Cause analysis: 1. Excessive lubricating grease increases the resistance of the lubricant; 2. Excessive internal load caused by small clearance; 3. Installation error; 4. Friction of sealing equipment; 5. Crawling of bearings. Solution: 1. Choose the correct oil and use an appropriate amount; 2. Correct the clearance preload and fit, and check the running condition of the free end bearing; 3. Bearing seat accuracy and installation method; 4. Improve the sealing form

7. Poor bearing feel:

Specific characteristics: When holding the bearing and rotating the rotor with your hand, you feel impurities and blockages inside the bearing.

. Cause analysis: 1. Excessive clearance; 2. Improper fit between inner diameter and shaft; 3. Canal damage. Solution: 1. Keep the clearance as small as possible; 2. Selection of tolerance zones; 3. Improve accuracy appropriately and reduce damage to the channel; 4. Oil selection