Thus will have a greater aerodynamic noise. In addition, the vacuum pump. Because of the periodic suction, exhaust and compression caused by fluctuating instantaneous isometric flow velocity and pressure. Between the rotor and the gap between the rotor and the cylinder will cause gas leakage, so that the efficiency is reduced. Roots blower displacement of 0.15150 m3 / min, speed of 1,503,000 rev / min. Single-stage pressure ratio is typically less than 1.7 up to 2.1 can be multi-level series. Roots blowers are the property of volume rotary blowers. This compressor rotor shaft by synchronized so that the two rotor gear meshing persist. Portion of the cylinder inner wall surface of each recess on the rotor composed of the working volume. When moved to the vicinity of the exhaust port and the exhaust port communicating transient, during the rotation of the rotor away from the gas intake port. Due to higher pressure gas recirculation, when the working volume of a sudden increase in pressure, and then the gas is supplied to the exhaust passage. Two rotors do not contact each other, the gap between the tightly controlled by a seal, so the gas discharged from the lubricating oil contamination. Choose a wide range of pressures, its biggest feature is the use when the pressure within the allowable range to adjust the flow rate of change is minimal. Has forced gas transmission characteristics. When the transmission medium is not oil. Simple structure, easy maintenance, long life, low vibration machine. Vortex fan, whirlpool fan, vortex pump www.mingxintm.com