At present, in all walks of life in China, all kinds of mechanical and electrical equipment and fan supporting the motor accounts for about 60% of the national installed capacity of the motor, consuming about one-third of the national power generation. It is worth mentioning that most of the Roots fan in the use of the process of the phenomenon of big marat car, coupled with changes in production, process, etc., the need to frequently adjust the flow of gas, pressure, temperature and so on.
At present, many units still use the backward way of adjusting the opening degree of the wind plate or valve to regulate the flow, pressure and temperature of the gas. This is actually through the artificial increase in the resistance of the way, and a waste of electricity and money as the cost to meet the process and working conditions of the gas flow regulation requirements. This backward regulation not only wastes valuable energy, but also has poor regulation accuracy, which is difficult to meet the requirements of modern production and service, and the negative effect is very serious.
Roots fan is a kind of volumetric fan, there are two three-bladed impellers rotating relative to each other in the space sealed by the casing and wall panels, because each impeller is an involute, or the envelope of the external pendulum line for the impeller processing line, each impeller's three blades are identical, while the two impellers are also identical, which greatly reduces the difficulty of processing. Impeller in the processing of CNC equipment, to ensure that the two impellers in the center distance remains unchanged, no matter what position the two impellers rotate to, can maintain a certain small gap, to ensure that the leakage of gas within the allowable range.