The steps and methods that need to be followed for the maintenance of Roots blowers to ensure their normal operation and extend their service life. Here are some key maintenance steps and precautions:
1、 Preparation before maintenance
1. Power outage: Before entering the maintenance area, the power must be cut off to ensure the safety of the workplace.
2. Air purification: Ensure clean air in the maintenance area to avoid damage to the fan caused by dust and corrosive substances.
3. Tool preparation: Prepare the necessary maintenance tools and ensure that they have the correct usage method.
4. Maintenance Plan: Develop a detailed maintenance plan to ensure that the entire maintenance process is organized.
2、 Common faults and maintenance methods
1. Friction between impellers
Reason: Accumulation of dirt on the impeller, gear wear, loose gear fixation, bearing wear, etc.
Solution: Check for dirt and internal components for damage; Adjust the gear clearance or replace the gear; Reinstall the gear to ensure that the contact area of the taper fitting meets the requirements; Replace the bearings.
2. Friction between impeller and wall panel, impeller top and casing
Reason: Incorrect installation clearance setting, operating pressure exceeding the specified range, high operating temperature, deformation of casing or machine base, poor axial positioning of bearings, etc.
Solution: readjust the gap to a suitable range; Identify the cause of overload and reduce the pressure to the specified range; Check installation accuracy and reduce pipeline tension; Check and repair the bearings to ensure proper clearance; Adjust the fan speed to prevent the belt from slipping.
3. The temperature is too high
Reasons: Excessive fuel volume, high viscosity or severe pollution in the fuel tank, clogged filters or mufflers, pressure above the specified value, excessive wear of impellers, poor ventilation, low operating speed, etc.
Solution: Lower the oil level or replace with new oil; Blockage; Reduce the pressure difference through the fan; Repair the gap to a suitable range; Open ventilation openings to lower room temperature; Increase the speed to prevent the belt from slipping.
4. Insufficient traffic
Reason: Blockage of the imported filter screen, severe wear of the impeller, belt slippage, excessive pressure loss at the inlet, and ventilation leakage in the pipeline.
Solution: Dust and blockages in the filter screen; Repair the impeller clearance; Tighten the belt and increase the number of strands; Adjust the import pressure to reach the specified value; Check and repair pipeline leaks.
5. Abnormal vibration and noise
Reason: Excessive clearance of rolling bearings or wear of bearing seats, excessive or misaligned gear backlash, collision between impeller and casing, overload or shaft deformation causing impeller collision, overheating causing friction between impeller and casing inlet, dust or foreign matter accumulation causing impeller imbalance, loosening of anchor bolts and other fasteners, etc.
Solution: Replace the bearing or bearing seat; Reinstall the gears and adjust the side clearance; Clean the fan and check if the casing is damaged; Check the back pressure, ensure 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 maintain a suitable working clearance; Tighten the anchor bolts and level the base.
6. Motor overload
Reasons: large pressure difference, fan flow exceeding equipment requirements, blockage of inlet filter or outlet pipeline, collision or friction between rotating parts, high oil level, overheating or excessive vibration of V-belt, etc.
Solution: Adjust the pressure to the specified range; Discharge excess gas into the atmosphere or reduce the speed of the blower; Obstacles, ensure unobstructed flow; Immediately stop the machine, thoroughly investigate the cause and handle it; Adjust the oil level to the appropriate position; Check the belt tension and replace it with a large-diameter pulley.
3、 Inspection and testing after repair
1. Appearance inspection: Check whether the appearance of the fan is damaged or deformed.
2. Functional testing: Start the fan, check if it runs smoothly, without any abnormal noise or vibration, and test if the parameters such as air volume and pressure meet the requirements.
3. Inspection: Ensure that all fasteners are tightened, electrical connections are firm and reliable, and there is no leakage.
4、 Daily maintenance suggestions
1. Regular cleaning and replacement of filters: Ensure good quality of air entering the fan.
2. Pay attention to the lubrication of bearings: Regularly check the lubrication of bearings and accurately add lubricating grease.
3. Check the motor and electrical components: Ensure that the motor is running normally and the electrical components are well connected.
4. Keep the fan clean: Avoid dust and impurities from entering the interior of the fan, which can affect its normal operation.
