Dry screw vacuum pump performance characteristics
Apr 27, 2022| Dry screw vacuum pump performance characteristics
1, there is no medium in the working chamber, that can obtain a clean vacuum 2, the working chamber and screw rotor surface anti-corrosion coating can adapt to bad working conditions 3, the gas in the pump without compression, is suitable for extraction of coagulable gas 4, a single pump can be pumped from the atmosphere to 1Pa, the vacuum system can be greatly simplified. 5. Water temperature has little influence on a vacuum, saving water over 90%, and even does not consume water. 6, no oil consumption, no-drip leakage 7, no friction between rotating parts, can operate at high speed, the machine small size 8, simple structure, convenient maintenance. 9, the pumped gas is directly discharged from the pump body, no pollution of water, no environmental pressure, more convenient gas recovery. 10, and roots pump, molecular pump composed of oil-free unit working principle and screw compressor similar, screw dry vacuum pump working process can be divided into suction, compression and exhaust three processes. As the rotor rotates, each pair of meshing teeth successively completes the same working cycle, now illustrated by one pair of teeth. During the suction process, the positive rotor rotates counterclockwise and the negative screw rotates clockwise. The upper rotor end face is the suction section, and the lower end face is the exhaust end face. The compression process turns to the exhaust end face. Here, the Yang rotor rotates clockwise and the Yin rotor rotates counterclockwise. The upper rotor end face is the suction section, and the lower end face is the exhaust end face. In the exhaust process of the screw pump exhaust process, the volume between the teeth and the exhaust orifice is connected, that is, the exhaust process begins. With the continuous reduction of the volume between the teeth, the gas with exhaust pressure is gradually discharged through the exhaust orifice.
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