Adjustment of clearance of Roots blower, detailed explanation of operation steps
The adjustment of the clearance of Roots blower is a key step to ensure its stable performance and operation. The following are the specific methods and precautions for adjusting the clearance of Roots blower:
1、 Adjustment method
1. Prepare tools and materials:
Before adjusting the gap, prepare the corresponding tools and materials, such as feeler gauges, screwdrivers, adjusting washers, etc., and ensure that the tools are complete and in good condition.
2. Shutdown and check:
Ensure that the fan has been shut down and the power supply has been disconnected to avoid accidents.
Check the operating status of the rotor, including whether it rotates smoothly and whether there are any abnormal sounds. If any abnormal situation is found, the machine should be stopped for inspection and troubleshooting in a timely manner.
3. Disassemble relevant components:
According to the structure of the fan, disassemble the air inlet, air outlet, bearing cover and other components for clearance adjustment. During the disassembly process, pay attention to recording the position and sequence of each component for subsequent reinstallation.
4. Measure the original gap:
Use tools such as feeler gauges to measure the original gap between the rotor and the casing. Ensure accurate measurement to provide reference for subsequent adjustments.
5. Adjust gap:
Impeller clearance: Rotate the impeller to a position 45 degrees from the horizontal direction, align the driven gear part with the driving gear mark and press it onto the shaft. Install the gear retaining ring, stop washer, and locking nut in sequence. By adjusting the inner and outer conical surfaces of the gear ring, hub, and shaft axially, the purpose of adjusting the impeller clearance is achieved. Usually, the clearance between impellers should be controlled within the range of 0.29 to 0.34 (this value may vary depending on the specific model).
Axial clearance: When assembling wall panels, ensure that the total axial clearance is within the standard range. By adjusting the thickness of the bearing bottom gasket, ensure even clearance at both ends. When assembling the wall panel, the position of the impeller shaft can be adjusted by adjusting the screws on the front wall panel.
Radial clearance: It is usually ensured through precise positioning of the casing and side plate, and users generally do not need to adjust it. If adjustment is required, it can be achieved by replacing or adjusting the gasket between the casing and the side panel.
6. Reinstall and test:
Reinstall all components according to the disassembly records.
Restart the fan and observe its operation. Use tools such as feeler gauges to measure the gap value between the rotor and the casing again, ensuring that the gap value meets the requirements.
2、 Precautions
1. Operation: Roots blower is a high-speed operating equipment, and its gap adjustment needs to be carried out when the equipment is stopped and powered off. Be sure to follow the operating procedures to ensure personnel safety.
2. Accuracy requirement: The adjustment of rotor clearance requires high precision. During the measurement and adjustment process, use measuring tools and ensure accurate and error free operation.
3. Record data: During the adjustment process, record in detail the thickness and clearance values of each adjusted gasket for subsequent analysis and optimization.
4. Regular inspection: Adjusting the rotor clearance is not a one-time task. The gap may change with the use and wear of the equipment. It is recommended to regularly check and adjust the clearance of the fan to ensure the long-term stable operation of the equipment.
5. Following the manufacturer's recommendation: Different models of Roots blowers may have different clearance adjustment requirements. When adjusting the gap, it is important to refer to the manufacturer's technical manual or maintenance guide and follow their recommended steps and methods.
In summary, the steps and precautions to be followed for adjusting the clearance of Roots blowers. By adjusting the gap reasonably, the gas transmission efficiency of the fan can be improved, noise and wear can be reduced, thereby extending the service life of the equipment.
