Why does Roots blower set torque? What's the use!

This is to protect the fan. In fact, not only Roots fans, but also some centrifugal fans, vortex fans and high-pressure fans need to be protected. The protection methods are different. The common ones are frequency converters and load electromagnetic protection valves.

Generally, the fan can be protected by controlling the current and internal pressure of the motor. Of course, many machines that can run for a long time without using protection methods are not excluded, but the life of the machine itself must be affected. Just like a motorcycle, some of them did not know how to change the engine oil and rode for tens of thousands of kilometers.

But the manufacturer's suggestion must be to change the engine oil frequently. This is the same reason

The two-stage roots blower is composed of two HSR series standard roots blowers in series. When the gas enters the fan for pressure boosting, the temperature of the gas is reduced to below 40 ℃ through the intercooler, and then enters the secondary fan for pressure boosting. The pressure of the unit can reach 177kPa. The host of the two-stage fan is driven by the same motor through belt drive or double shaft extension motor.
Application scope and conveying medium two-stage roots blower is a device composed of two roots blowers in series. There are two three blade rotors with opposite turning directions inside each fan case. Each three blade rotor is supported by two bearings. A pair of high-precision synchronous spur gears are used to keep the relative positions of the two rotors constant. A gap of * * * is maintained between the rotors and between the rotor and the case, and the rotor rotates without contact. Driven by the synchronous gear of the side box, the rotor separates the air inlet from the air outlet with the help of the "meshing" of the two rotors, completing the transfer process of the closed gas between the box and the rotor from the suction side to the discharge side. During rotation, the gas in the working chamber is pushed from the air inlet to the air outlet without internal compression. There are tiny gaps between rotors, between rotors and boxes, between rotors and wallboards, so there is no friction or contact wear in the working chamber.
Performance characteristics:
1. The two-stage three leaf Roots blower has high volumetric efficiency, large air supply, stable operation, reliable use and relatively stable working characteristics.
2. The impeller and shaft are of integral structure, and the impeller is free of wear. The performance of the fan is permanent and can operate continuously for a long time.
3. For forced gas transmission, the flow changes little with the pressure, the outlet pressure is determined by the back pressure, and the transmission gas is not polluted by oil.
4. The selection of bearings is reasonable, the service life of each bearing is even, and the fan oil seal is made of * * * fluororubber material, which is high temperature resistant and wear-resistant, so the fan has a long service life and high reliability.
5. The fan has large volume utilization rate, high volume efficiency, simple and compact structure, and flexible installation mode.
Easy to use and maintain.
6. Due to the adoption of the three blade rotor structure and the reasonable structure at the inlet and outlet of the housing, the fan has low vibration and noise. Pressure and temperature control to provide unit operation protection.