Double cylinder Roots blower

Working principle of dual cylinder water-cooled variable frequency Roots blower:

The Roots blower is a positive displacement rotary fan, which is equipped with a pair of rotors that rotate in opposite directions inside the casing. There are appropriate gaps between the rotors and between the rotors and the casing, forming an intake chamber and an exhaust chamber that are isolated from each other. With the rotation of the rotors, gas is pushed from the intake chamber to the exhaust chamber and then discharged from the body, completing the process of suction and exhaust. The two blade Roots blower completes four suction and exhaust processes in one rotation, resulting in smoother operation, less vibration, and lower noise. Gas does not undergo compression changes inside the body. When it reaches the exhaust port, due to the exhaust port being equal to the working resistance, the exhaust gas must overcome the resistance before it can be discharged, thus forming the pressure of the gas. Therefore, the flow rate of the fan is related to the volume and speed of the fan.


Double oil tank Roots blower is a mechanical device that includes an active shaft and a driven shaft. One end of the active shaft and the driven shaft is equipped with a gear, which is placed in the oil tank and the other end is the driving end. The driving end is also equipped with an oil tank, and an oil slinger ring is placed on the driving end shaft. The bearings at both ends of the fan are lubricated with oil, improving the lubrication conditions of the fan bearings and extending their service life. This makes the Roots blower suitable for high pressure operation without the need for water cooling, greatly reducing the operating cost of the fan. At the same time, it is suitable for high-speed operation, improving the volumetric efficiency and overall efficiency of the fan

Advantages of dual cylinder water-cooled Roots blower:

The drive end bearing of the single cylinder Roots blower adopts the method of injecting butter, and the actual degree of butter loss cannot be observed from outside the blower, which can easily cause damage to the blower bearing due to the lack of butter. The dual cylinder Roots blower has separate oil cylinders at both the drive end and the gear end, and the mechanical body is completely immersed in gear oil. Additionally, there is an oil window at the lower end of the oil tank to observe the condition of the gear oil, reducing maintenance intensity and time, and eliminating the need for excessive requirements for the quality of maintenance personnel.