The burnout of the Roots blower motor is a serious malfunction that may be caused by various factors. The following is a detailed analysis of the causes of motor burnout in Roots blowers:
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1、 Overload and Overloading
When the Roots blower is running, if the load exceeds the rated capacity of the motor, the motor will generate excessive heat, causing it to overheat and potentially burn out. This situation is common when the operating load of Roots blower exceeds the rated pressure, resulting in the blower being in an overloaded state for a long time.
2、 The motor runs idle for a long time
If the Roots blower experiences excessive resistance during operation and stops, but the motor is not stopped in time, it may cause the motor to idle for a long time. In idle state, the motor is still consuming and generating heat, and long-term accumulation may cause the motor to overheat and burn out.
3、 Abnormal power supply voltage
Excessive or insufficient power supply voltage can cause motor overload or malfunction, which may result in motor burnout. For example, some motors have a rated voltage of 220V. If a voltage of 380V is used during actual wiring, the motor may be burned out due to excessive voltage.
4、 Motor bearing failure
Motor bearing failure is one of the common causes of motor burnout. Bearing damage, axial bending, belt breakage, and other phenomena can cause friction between the stator and rotor, generating a large amount of heat that may burn out the motor. In addition, improper assembly of bearings, unclean grease, or mixed use of different types of grease may also lead to bearing failures.
5、 Motor phase loss operation
For three-phase asynchronous motors, phase loss operation is fatal. If any phase of the three-phase winding of the motor is disconnected during operation, it will cause the fan to vibrate, produce abnormal sounds, decrease the speed, increase the current, and cause the motor temperature to rise sharply, thereby burning out the motor.
6、 Other factors
1. External damage to the motor, such as water wetting, aging wires, and excessive dust interference, can affect the normal operation of the Roots blower motor and may even cause the motor to burn out in severe cases.
2. High temperature of Roots blower: High temperature can lead to various problems of Roots blower, such as failure of gearbox lubricating oil, gear friction, etc., which may cause motor burnout.
3. Insufficient closure or opening of air valve: After the Roots blower is started, if the air valve is not opened or the amount of opening is insufficient, it will cause the working temperature of the motor body to rise sharply and burn out.
4. Motor moisture: Insulation reduction caused by water ingress or moisture in the distribution cabinet or motor is also a common cause of damage.
In summary, there are various reasons for the burning of the Roots blower motor, and prevention and investigation need to be carried out from multiple aspects. In practical operation, the Roots blower and its motor should be regularly inspected and maintained to ensure that they are in good working condition. At the same time, all indicators should be checked before operation to avoid motor burnout caused by improper operation.
