Roots blowers may encounter various faults during operation. Here are some common faults, causes, and corresponding solutions:
1、 Friction between impellers
1. Reason for malfunction:
There are pollutants and impurities on the impeller, causing the clearance to be too small.
Gear wear causes large backlash.
The gears are not firmly fixed and cannot maintain the synchronization of the impeller.
Bearing wear causes clearance.
2. Solution:
Dirt and inspect the internal components for any damage.
Adjust the gear clearance. If the gear backlash is greater than the average value by 30-50, the gear should be replaced.
Reinstall the gear and maintain a taper fit contact area of 75.
Replace the bearings.
2、 Friction between impeller and wall panel, impeller top and casing
1. Reason for malfunction:
The installation gap is incorrect.
The operating pressure is too high, exceeding the specified value.
The operating temperature is too high.
The casing or machine base is deformed, and the positioning of the fan is ineffective.
Poor axial positioning of the bearing.
2. Solution:
Adjust the gap again.
Identify the cause of overload and reduce the pressure to the specified value.
Check installation accuracy and reduce pipeline tension.
Check the bearings and ensure clearance.
3、 The temperature is too high
1. Reason for malfunction:
There is too much, too thick, and too dirty oil in the fuel tank.
Filter or muffler blockage.
The pressure is higher than the specified value.
The impeller is excessively worn and has a large gap.
Poor ventilation and high indoor temperature result in high inlet temperature.
The operating speed is too low, causing the belt to slip.
2. Solution:
Reduce the oil level or change the oil.
Blockage.
Reduce the pressure difference through the blower.
Gap.
Open ventilation openings to lower room temperature.
Increasing the speed causes the belt to slip.
4、 Insufficient traffic
1. Reason for malfunction:
Import filter blockage.
The impeller is worn and there is too much clearance.
The belt slips.
The import pressure loss is significant.
The pipeline causes ventilation leakage.
2. Solution:
Dust and blockages in the filter.
Gap.
Tighten the belt and increase the number of strands.
Adjust the import pressure to reach the specified value.
Inspect and pipeline.
5、 Oil leakage or oil leakage into the casing
1. Reason for malfunction:
The fuel tank is at a high level and leaks out through the oil outlet.
Seal wear causes oil leakage at the shaft end.
The pressure is higher than the specified value.
The ventilation openings of the wall panel and fuel tank are blocked, causing oil leakage into the casing.
2. Solution:
Lower the oil level.
Replace the seal.
Reduce the pressure to the specified value.
Clear the ventilation opening, install a 2mm hole plug in the middle chamber, and open the plug under the wall panel.
6、 Abnormal vibration and noise
1. Reason for malfunction:
The clearance of the rolling bearing exceeds the specified value or the bearing seat is worn.
The gear backlash is too large, misaligned, and not securely fixed.
Due to foreign objects and dust, impellers collide with each other and with the casing.
Impeller collision caused by overload and shaft deformation.
Friction between the impeller and the inlet of the casing is caused by overheating.
Due to accumulation of dirt or foreign objects, the impeller loses balance.
The anchor bolts and other fasteners are loose.
2. Solution:
Replace the bearing or bearing seat.
Reinstall the gear and ensure the side clearance.
Clean the blower and check if the casing is damaged.
Check the back pressure, check if the impeller is aligned, and adjust the clearance.
Check the filter and back pressure, and increase the gap between the impeller and the inlet of the casing.
Clean the impeller and casing to ensure the working clearance of the impeller.
Tighten the anchor bolts and level the base.
7、 Motor overload
1. Reason for malfunction:
Compared with the specified pressure, the pressure difference is large, that is, the back pressure or inlet pressure is high.
Compared to the required flow rate of the equipment, the fan flow rate is too large, resulting in pressure.
The inlet filter is blocked, and the outlet pipeline is obstructed or blocked.
Rotating components collide and rub against each other, causing them to get stuck.
The oil level is too high.
Narrow V-belt overheating, excessive vibration, and small pulley.
2. Solution:
Reduce the pressure to the specified value.
Release excess gas into the atmosphere or reduce the speed of the blower.
obstacle.
Immediately stop the machine and investigate the cause.
Adjust the oil level to the correct position.
Check the belt tension and replace it with a large-diameter pulley.
In summary, the common faults of Roots blowers involve multiple aspects and require corresponding solutions to be taken for specific causes. During the maintenance process, the operating procedures should be strictly followed to ensure personal safety. At the same time, after the maintenance is completed, a trial run should be conducted and the performance of the fan should be checked to ensure normal operation.
