To be divided into occasions, small occasions is certainly the high efficiency of the whirlpool air pump, large occasions will have to use the Roots fan. In fact, the vortex fan and Roots fan are called high-pressure fan, are working at a higher pressure fan.
Turbo high-pressure fan is also called whirlpool air pump, its working principle is: when the impeller rotates, due to the role of centrifugal force, the wind vane prompts the gas to move forward and outward, thus forming a series of spiral movement. Impeller blades between the air was spiraled to accelerate the rotation and the pump body outside the gas squeezed into the (inhaled by the suction port) side channel, when it enters the side channel, the gas is compressed, and then back to the impeller blades between the accelerated rotation again. As the air travels along a spiral track through the impeller and side channels, each impeller blade increases the degree of compression and acceleration, and as the rotation proceeds, the kinetic energy of the gas increases, causing the pressure of the gas passing along the side channels to increase further. When the air reaches the point where the side channel meets the discharge flange (the side channel narrows at the outlet), the gas is squeezed out of the vanes and discharged from the pump through the outlet muffler.
Scroll air pump schematic
Roots fan is a volumetric fan, conveying the volume of air proportional to the number of revolutions, three-bladed impellers by two impellers for each rotation of the three suction, exhaust, and two-bladed type compared to the gas pulsation becomes less, the load change is small, high mechanical strength, low noise, vibration is also small. There are 2 three-lobe type impellers on the shaft of 2 flat phase rows, the wheel and oval chassis bore surface and the impeller always keep a small gap between the three, because the impeller is the opposite direction of each other and rotate at a constant speed, so that the box and the impeller surrounded by a certain amount of gas by the inhalation of one side of the conveyor to the side of the discharge. Each branch of the impeller is always kept in the correct phase by synchronous gears, and will not touch each other, thus it can be high-speed, without internal lubrication, and simple structure, smooth operation, stable performance, adapt to a variety of uses, has been used in a wide range of fields. Rotary fan and Roots fan are very different, structural form and working principle and working characteristics are different.
Roots fan schematic diagram
Simply put, the whirlpool fan is to rely on centrifugal force to send the gas out, and the Roots fan is forced to transport the gas, that is, the compressed gas transport. Take sewage treatment as an example, the whirlpool fan is suitable for small pool oxygen supply, economical and cost-effective; Roots fan is used in large-scale sewage treatment, the wind pressure is relatively large. Selected according to your use of pressure and gas volume, general wind pressure, gas volume of large selection of Roots fan is more suitable. But if the wind pressure is within 20KPa, the air volume is large, you can choose the ring fan, more reasonable. Equipment selection, the use of Roots fan recommended Pepsi or Jin Gong can be, whirlpool fan can choose Geling or Senz, are domestic cost-effective, more durable.