1.設備轉速：螺桿空壓機的排氣量與轉速成正比，而轉速往往會隨電網(wǎng)的電壓、頻率而變化。當電壓降低或頻率降低時，轉速將下降，使螺桿空壓機排氣量減少。
1. Equipment speed: the displacement of screw air compressor is directly proportional to the speed, and the speed often changes with the voltage and frequency of the grid. When the voltage or frequency is reduced, the rotating speed will decrease, which will reduce the air displacement of screw air compressor.
2.吸氣狀態(tài)：螺桿空壓機是容積型壓縮機，吸氣體積不變。當吸氣溫度升高，或吸氣管路阻力過大而使吸入壓力降低時，氣體的密度減小，相應地會減少螺桿空壓機排氣量；
2. Suction state: screw air compressor is a volumetric compressor, and the suction volume remains unchanged. When the suction temperature increases or the suction pressure decreases due to the excessive resistance of the suction pipe, the density of the gas decreases, which correspondingly reduces the exhaust volume of the screw air compressor;
3.氣體泄漏：轉子相互之間及轉子與外殼之間在運轉時沒有接觸，保持有一定的縫隙，所以會產生氣體泄漏。壓力升高后的氣體通過縫隙向吸氣管道及正在吸氣的嚙槽泄漏時，將使排氣量減小。為了減少泄漏量，在從動轉子的齒頂做有密封齒，主動轉子的齒根開有密封槽，端面也加工有環(huán)狀或條狀的密封齒。如果這些密封線磨損，將使泄漏量增加，因此平時維護的時候應該考慮到這些因素；
3. Gas leakage: there is no contact between the rotors or between the rotors and the shell during operation, and there is a certain gap, so gas leakage will occur. When the pressure increases, the gas will leak to the suction pipe and the meshing groove, which will reduce the exhaust volume. In order to reduce the leakage, a sealing tooth is made on the tooth top of the driven rotor, a sealing groove is opened on the tooth root of the driving rotor, and the ring 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 taken into account during maintenance;
4.冷卻效果：氣體在壓縮過程中溫度會升高，轉子與機殼的溫度也相應升高，所以在吸氣過程中，氣體會受到轉子和機殼的加熱而膨脹，因此相應地會減少吸氣量。螺桿式空氣壓縮機的轉子中有的采用了油冷卻，機殼用水冷卻，其目的之一就是為了降低其溫度。當冷卻效果不好時，溫度則升高，螺桿空壓機排氣量便會減少。
4. Cooling effect: the temperature of the gas will rise during the compression process, and the temperature of the rotor and the casing will also rise accordingly. Therefore, during the suction process, the gas will be expanded by the heating of the rotor and the casing, so the suction capacity will be reduced accordingly. Some rotors of screw air compressor are cooled by oil, and the casing is cooled by water. One of the purposes is to reduce the temperature. When the cooling effect is not good, the temperature will rise, screw air compressor exhaust will be reduced.
