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What is the cause of motor shaft breakage? How to avoid it?

2023-08-24 12:16:23來源:

When the motor shaft breaks, it means that the motor shaft or parts connected to the shaft have broken during operation. Motors are crucial drivers in many industries and equipment, and shaft breakage can cause equipment to stop operating, resulting in production interruptions and losses. The following article explains the cause of motor shaft breakage.

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1. Overload: When the motor is subjected to work exceeding its rated load, it can cause shaft breakage. Overload may be caused by sudden increase in load, equipment failure, or improper operation. When the motor is unable to handle excessive loads, its internal materials may not be able to withstand pressure and fracture may occur.

2. Unbalanced load: If an unbalanced load is installed on the motor shaft, it will cause an increase in vibration and impact force during rotation. These vibrations and impact forces can cause stress concentration at the shaft, ultimately leading to shaft fracture.

3. Shaft material issue: The quality of the motor shaft material may also cause shaft breakage. If the shaft material does not meet the requirements, such as defects, insufficient material strength, or expired service life, it will be prone to fracture during operation.

4. Bearing failure: The bearing of the motor is an important component that supports the rotation of the shaft. When the bearings are damaged or excessively worn, abnormal friction can occur on the shaft during operation, increasing the risk of shaft breakage.

5. Design or manufacturing defects: When there are problems in the design and manufacturing process of the motor, it may also cause shaft breakage. For example, ignoring factors such as load changes during the design process, material quality issues or improper assembly during the manufacturing process can lead to unstable shaft structure and easy fracture of the motor.

6. Vibration and impact: The vibration and impact force generated by the motor during operation can also have adverse effects on its shaft. Long term vibration and impact can lead to metal fatigue, ultimately leading to shaft breakage.

7. Temperature issue: The motor may generate excessive temperature during operation. If the temperature is not controlled properly and exceeds the material's tolerance limit, it can cause uneven thermal expansion and contraction of the shaft material, leading to fracture.

8. Improper maintenance: Lack of regular maintenance and upkeep is also one of the common reasons for motor shaft breakage. If the dust, foreign objects, and lubricating oil inside the motor are not cleaned in a timely manner, it will increase the running resistance of the motor, causing unnecessary stress on the shaft and fracture.

To reduce the risk of motor shaft breakage, the following suggestions can be used for reference:

1. Correct selection of motor: Select a motor with appropriate power and load range according to actual needs to avoid overload operation.

2. Balanced load: When installing and adjusting the load of the motor, it is important to maintain balance to avoid vibration and shock caused by unbalanced loads.

3. Use high-quality materials: Select high-quality and compliant motor shaft materials to ensure their strength and fatigue resistance.

4. Regular maintenance: Conduct regular inspections and maintenance, clean foreign objects and dust inside the motor, maintain the bearings in good condition, and replace severely worn parts.

5. Temperature control: Monitor the working temperature of the motor and use measures such as radiators or cooling devices to control the temperature to avoid adverse effects of overheating on the shaft.

6. Adjustment and calibration: Regularly check and adjust the alignment and balance of the motor to ensure its normal operation and stability.

7. Train operators: Provide correct operational guidance and training to ensure that they understand the correct operating methods and maintenance requirements.

In summary, motor shaft breakage may be caused by various reasons such as overload, unbalanced load, shaft material issues, bearing failures, design or manufacturing defects, vibration and shock, temperature issues, and improper maintenance. By selecting motors reasonably, balancing loads, using high-quality materials, regular maintenance, and training operators, the risk of motor shaft breakage can be reduced, ensuring the normal operation of the motor and the continuous stability of the equipment.


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