In 1948, Denmark developed adjustable axial flow side channel blower, rotating axial flow side channel blower, Meridional Acceleration axial flow side channel blower, inclined side channel blower and cross flow side channel blower. According to the air flow direction, side channel blowers can be divided into centrifugal type, axial type, inclined type and cross flow type. When the centrifugal side channel blower works, the power machine (mainly the motor) drives the impeller to rotate in the volute, and draws air from the center of the impeller through the suction port. Due to the dynamic influence of the blade on the gas, the pressure and speed of the gas can be increased. Under the action of centrifugal force, the gas can be dumped on the shell along the path of the blade and discharged from the exhaust port. Because the flow of gas in impeller is mainly in radial plane, it is also called runoff side channel blower.
With the progress and development of the times, people are more and more dissatisfied with the pressure and air volume requirements of the centrifugal air pump. The noise of the centrifugal air pump has become a headache in the factory. Therefore, Japan first launched a totally enclosed flow measurement side channel blower, which is today's high-pressure side channel blower (vortex vacuum pump). The side channel blower has small appearance and low noise, which meets the requirements of high-pressure side channel blower for the first time. Later, the side channel blowers were upgraded successively and developed into high-pressure side channel blowers with single-stage, double-stage and three-stage impellers. The maximum pressure of high-pressure side channel blowers was restored to 230 kPa, but only the limit pressure of the side channel blower was used.
