What are the reasons for the large vibration of Roots blower
There may be multiple reasons for the high vibration of Roots blowers, and the following are some of the main factors:
1、 Magnetic bearing imbalance:
1. Long term use of magnetic bearings leads to wear and tear.
2. Improper installation of magnetic bearings or external interference.
3. These issues will cause vibration in the rotor of the Roots blower, thereby exacerbating the vibration of the entire system.
2、 Impeller imbalance:
1. Loose, altered, deformed or unevenly corroded components on the impeller.
2. Solid particles in the working medium deposit on the rotor.
3. The weight of the new parts replaced during maintenance is uneven.
4. The material of the impeller in manufacturing is uneven, there are errors in machining accuracy, and there are deviations in assembly.
5. Unbalanced impellers can also cause vibration of the fan rotor.
3、 Improper installation:
1. The installation position of the Roots blower is unstable or uneven.
2. The installation level of the unit is not good, and the rotor deflection has changed.
3. The installation of the inlet and outlet ducts of the Roots blower is poor.
4. Installation or adjustment that does not comply with regulatory requirements may result in issues such as friction and imbalance between the impeller and the housing.
4、 Power quality issues:
1. The power supply voltage of the Roots blower is unstable.
2. There are harmonics in the power supply.
3. These power issues can cause vibration in the entire system.
5、 Control system issues:
1. Improper setting of control system parameters for Roots blower.
2. There is a problem with the control system.
3. All of these will affect the stable operation of the fan, leading to vibration.
6、 Mechanical malfunction:
1. The bearing clearance is too large or damaged.
2. The spindle is bent.
3. The gap between the collector and the impeller of the Roots blower is uneven or there may be friction.
4. The center alignment error of the coupling is too large, the clearance between the coupling and the shaft is too large, or the clearance between the elastic sleeve is too large and uneven.
5. There is friction inside the casing, and the impeller tilts and collides with the inner wall of the casing.
6. Loose anchor bolts or foundation sinking, tilting, or cracking.
7. Blockage, rust, and dirt in the conveying medium channel.
8. These mechanical failures can also cause vibration of the Roots blower.
7、 Electrical issues:
1. The three-phase magnetic field of the stator is asymmetric, and the magnetic center is misaligned due to reasons such as unbalanced three-phase voltage and single-phase operation.
2. The looseness of the stator core or stator coil increases the electromagnetic vibration and noise of the stator.
3. Electromagnetic vibration caused by uneven air gap in the motor.
4. Fault in rotor conductor, loose parts, etc.
8、 To solve the problem of large vibration in Roots blowers, the following measures can be taken:
1. Balance and adjust the magnetic bearings, check the wear of the bearings, the integrity of the blades, and the tightness of the transmission system.
2. Perform balance correction on the impeller to ensure that the components on the impeller are tight and uniform, and to avoid solid particles in the working medium from depositing on the rotor.
3. Ensure that the installation position of the Roots blower is stable and flat, in compliance with regulatory requirements, and avoid issues such as friction and imbalance between the impeller and the housing.
4. Inspect and maintain the power supply to ensure stable voltage and absence of harmonics.
5. Debug and optimize the control system to ensure its normal operation.
If the above measures cannot solve the problem, it is recommended to contact the supplier or maintenance personnel of the Roots blower for handling.
