- Leakage: When the screw air compressor is running, there is a gap between the rotors and between the rotor and the casing, and no direct contact will cause gas leakage. When the gas pressure rises through the suction pipe gap and suction groove, it can reduce the air discharge. Therefore, in order to reduce the leakage of the permanent magnet variable frequency screw air compressor, the sealing teeth should be made on the top of the driven rotor teeth, the sealing groove should be opened on the root of the driving rotor teeth, and the ring or strip sealing teeth should be processed on the end face. But when the sealed pipes wear down, the leakage increases and the amount of exhaust gas decreases.
- Suction state: The permanent magnet frequency conversion screw air compressor is a volumetric compressor with constant gas absorption. When the suction temperature rises or the suction pipeline resistance is too large to reduce the suction pressure, the gas density will decrease and the gas volume will decrease accordingly.
- Condensation effect: When the gas is compressed, the temperature will rise, and the temperature of the rotor and the casing will also rise. During the suction process, the gas is expanded by the heating of the rotor and the housing to reduce the suction volume. The rotor of the air compressor is sometimes oil cooled, and the casing is condensed by water, mainly due to the temperature drop. If the condensation is not good, the temperature will rise and the amount of exhaust gas will decrease.
- Speed: The displacement of the permanent magnet variable frequency screw air compressor is directly proportional to the speed. The speed will vary with the voltage and frequency of the grid. When the voltage (for asynchronous motors) or frequency decreases, the speed decreases and the air volume decreases.
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