The maintenance and adjustment of the clearance of Roots blower is a key step to ensure its stable performance and operation. The following is a detailed guide for adjusting the clearance during the maintenance of Roots blowers:
1、 Preparation work before gap adjustment
1. Shutdown and power off: Before adjusting the gap, first ensure that the fan has been shut down and the power supply has been disconnected to ensure operation.
2. Dismantling related components: Depending on the structure of the fan, some components may need to be disassembled for gap adjustment. This usually includes disassembling the air inlet, air outlet, bearing cover, etc. During the disassembly process, it is important to record the position and sequence of each component for future reinstallation.
3. Prepare tools and materials: When adjusting the gap, it is necessary to prepare corresponding tools and materials, such as feeler gauges, screwdrivers, adjusting washers, etc. Ensure that the tools are complete and in good condition for smooth adjustment.
2、 Gap adjustment method
The adjustment of clearances in Roots blowers mainly includes the adjustment of clearances between impellers, impellers and casings, as well as axial and radial clearances.
Adjustment of impeller clearance:
1. Rotate the impeller to a position 45 degrees from the horizontal direction.
2. Align the driven gear part with the driving gear mark and press it onto the shaft, then install the gear retaining ring, stop washer, and locking nut in sequence.
3. 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 millimeters.
Adjustment of axial clearance:
1. When assembling wall panels, the first step should be to ensure that the total axial clearance is within the standard range.
2. By adjusting the thickness of the bearing bottom gasket, ensure even clearance at both ends.
Adjustment of radial clearance:
1. The radial clearance is usually ensured by precise positioning of the casing and side plate, and users generally do not need to adjust it.
2. If adjustment is required, it can be achieved by replacing or adjusting the gasket between the casing and the side panel.
3、 Inspection work after gap adjustment
1. Reinstall and test: After adjusting the gap, reinstall all components according to the disassembly records. Then, restart the fan and observe its operation. If abnormalities or poor performance are found, further adjustments may be necessary.
2. Check the rotor status: During the operation of the fan, check the operating status of the rotor, including whether the rotation of the rotor is smooth, whether there are any abnormal sounds, etc.
3. Measure gap value: Use tools such as a feeler gauge to measure the gap value between the rotor and the casing again, ensuring that the gap value meets the requirements.
4、 Precautions
1. 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.
2. Use specialized tools: The gap adjustment of Roots blower requires the use of specialized adjustment tools or equipment. Using inappropriate tools may result in inaccurate adjustments or damage to the equipment.
3. Attention to 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. When adjusting the gap, it is necessary to follow the operating procedures to ensure the safety of personnel and equipment.
4. Regular inspection and adjustment: Adjusting the clearance of Roots blowers 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.
In summary, the steps and precautions to be followed for adjusting the clearance during the maintenance of Roots blowers are necessary to ensure their stable performance and operation.
