1. Intake state of screw air compressor:
The screw air compressor is a positive displacement compressor, and the intake volume remains unchanged. When the intake temperature rises, or the intake pipe resistance is too large to reduce the intake pressure, the density of the gas decreases, and the exhaust volume of the screw air compressor will be reduced accordingly.
2. The speed of screw air compressor equipment:
The exhaust volume of the screw air compressor is proportional to the speed, and the speed often changes with the voltage and frequency of the power grid. When the voltage decreases or the frequency decreases, the speed will decrease, reducing the exhaust volume of the screw air compressor.
3. Cooling effect of screw air compressor:
The temperature of the gas will increase during the compression process, and the temperature of the rotor and the casing will also increase accordingly. Therefore, during the intake process, the gas will be heated by the rotor and the casing and expand, so the intake volume will be reduced accordingly. Some of the rotors of screw air compressors are cooled with oil, and the casing is cooled with water. One of the purposes is to reduce its temperature. When the cooling effect is not good, the temperature rises and the exhaust volume of the screw air compressor will decrease.
4. Gas leakage of screw air compressor:
The rotors do not contact each other and between the rotor and the shell during operation, and a certain gap is maintained, so gas leakage will occur. When the gas with increased pressure leaks through the gap to the suction pipe and the meshing groove being sucked, the exhaust volume will be reduced. In order to reduce the leakage, sealing teeth are made on the top of the driven rotor, sealing grooves are opened on the root of the active rotor, and ring-shaped or strip-shaped sealing teeth are also processed on the end face. If these sealing lines are worn, the leakage will increase, so these factors should be considered during routine maintenance.