The air compressor rotor rotates at high speed, while the end face is stationary. There is a certain gap between them, and the larger the compressor power, the larger the gap will be. An important step in assembling the compressor rotor is to adjust its gap. If it is adjusted too large, it will affect the compressor exhaust volume, and if it is too small, it is easy to cause friction and high temperature. The end gap of the screw compressor is determined by the designer when designing. Generally, the gap is determined based on factors such as the size of the machine, the operating conditions, the material of the rotor and its cylinder body. As long as the gap is within a certain range, it will not affect the normal operation of the machine.
If the air compressor head needs to be overhauled after many years of use, it is best to understand the gap range of the head from the manufacturer during maintenance, and it is best to measure the accurate gap value of the machine when disassembling the machine, and try to ensure this gap value during installation. Of course, the structures of various manufacturers are different, and the gap adjustment is also different. Specific problems should be analyzed specifically. If the head failure is caused by the working environment, you can use an air filter under harsh working conditions to improve the operating environment, protect the host from the source, and reduce operating costs.
The clearance between the inlet and exhaust ends of the main engine of the screw air compressor is mainly due to the various thermal expansions in the sealing chamber, so different clearances are left. In addition, because the force on the exhaust end is greater than that on the intake end, a thrust bearing is used at the exhaust end. If the clearance at the exhaust end is too large, the compression efficiency will be affected; if it is too small, the thermal expansion clearance must also be guaranteed. At this time, the bearing clearance must also be considered. When repairing the main engine, it can be appropriately relaxed a little, mainly to ensure normal operation. The clearance between the rotor and the casing is generally the same as above. The screw main engine is a precision component, and it is necessary to fully master the relevant maintenance technology to perform good maintenance. Finally, the repaired main engine is inspected, and then put into operation after the final assembly test step by step.