1.設(shè)備轉(zhuǎn)速：螺桿空壓機(jī)的排氣量與轉(zhuǎn)速成正比，而轉(zhuǎn)速往往會(huì)隨電網(wǎng)的電壓、頻率而變化。當(dāng)電壓降低或頻率降低時(shí)，轉(zhuǎn)速將下降，使螺桿空壓機(jī)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(jī)是容積型壓縮機(jī)，吸氣體積不變。當(dāng)吸氣溫度升高，或吸氣管路阻力過(guò)大而使吸入壓力降低時(shí)，氣體的密度減小，相應(yīng)地會(huì)減少螺桿空壓機(jī)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(zhuǎn)子相互之間及轉(zhuǎn)子與外殼之間在運(yùn)轉(zhuǎn)時(shí)沒(méi)有接觸，保持有一定的縫隙，所以會(huì)產(chǎn)生氣體泄漏。壓力升高后的氣體通過(guò)縫隙向吸氣管道及正在吸氣的嚙槽泄漏時(shí)，將使排氣量減小。為了減少泄漏量，在從動(dòng)轉(zhuǎn)子的齒頂做有密封齒，主動(dòng)轉(zhuǎn)子的齒根開(kāi)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(shí)維護(hù)的時(shí)候應(yīng)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(guò)程中溫度會(huì)升高，轉(zhuǎn)子與機(jī)殼的溫度也相應(yīng)升高，所以在吸氣過(guò)程中，氣體會(huì)受到轉(zhuǎn)子和機(jī)殼的加熱而膨脹，因此相應(yīng)地會(huì)減少吸氣量。螺桿式空氣壓縮機(jī)的轉(zhuǎn)子中有的采用了油冷卻，機(jī)殼用水冷卻，其目的之一就是為了降低其溫度。當(dāng)冷卻效果不好時(shí)，溫度則升高，螺桿空壓機(jī)排氣量便會(huì)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.
