Reason for impeller collision of Roots blower
The main reasons for the impact of Roots blower impeller include the following:
1. Impeller pollution: Dust or foreign objects in the air may enter the Roots blower and adhere to the impeller. These pollutants or foreign objects will occupy the originally small impeller gap, causing the gap to disappear and leading to collisions between the impellers. At this point, only dirt or foreign objects are needed to solve the problem.
2. Gear problem:
Gear wear: The rotation of the impeller depends on the drive of a pair of synchronous gears. Gear wear can lead to an increase in side clearance, which in turn can disrupt the clearance and synchronization of impeller rotation, resulting in impact. When the backlash of the gear exceeds the specified value by 30-50, replacement of the gear should be considered.
Unstable gear fixation: If the gear cannot be firmly fixed on the shaft, it will also damage the clearance of the impeller and cause impact. At this point, the gear should be reassembled to ensure that the contact area between the gear and the shaft taper is at least 75.
3. Bearing wear: Bearing wear can cause an increase in clearance, resulting in vibration of the supported shaft. When vibration is transmitted to the impeller, it will damage the clearance between the impeller and cause impact. The solution to this problem is to replace the worn bearings.
4. Too small axial clearance: The design of Roots blowers requires ensuring sufficient axial clearance between the impellers. If the axial clearance is too small, the impeller will experience scraping and collision during rotation. At this point, it is necessary to adjust the position of the gears or bearings to ensure that the axial clearance between the impellers meets the design requirements.
5. Blade wear or deformation: After prolonged use, the blades may experience wear or deformation, resulting in a decrease in impeller clearance and an increased risk of impact. Therefore, it is very important to regularly check the condition of the blades and replace worn or deformed blades in a timely manner.
6. Uneven load distribution: During the operation of Roots blower, if the load distribution is uneven, one of the impellers may bear excessive load, resulting in impact. At this point, it is necessary to adjust the load distribution to ensure even force distribution between the two impellers.
7. Poor lubrication: Good lubrication is crucial for reducing friction and wear between impellers. If the lubrication is insufficient or the quality of the lubricating oil is poor, the friction between the impellers will increase, leading to impact. Therefore, it is necessary to regularly check the lubrication condition, ensure the use of appropriate lubricating oil, and lubricate according to requirements.
In summary, there are various reasons for the impact of Roots blower impellers, and corresponding measures need to be taken according to the specific situation to solve them. In daily use, it is necessary to strengthen the maintenance and upkeep of equipment, timely detect and eliminate potential faults, to ensure the normal operation of equipment and extend its service life.
