There is a long history of the development of fans in China. As early as many years BC, China has produced a simple wooden huller for rice hulling. Its function principle is basically the same as that of modern centrifugal fans.
The principle of side channel blower is that under design conditions, the fan with wind pressure of 30kPa~200KPa or compression ratio E =1.3~3 belongs to the category of side channel blower. At present, the gas ring vacuum pump is generally classified as side channel blower in the industry. At present, the high pressure fan is mostly used in industrial production, widely used in environmental protection water treatment, such as the sewage aeration, to meet the needs of the aerobic microorganisms of the activated sludge of a good contact with oxygen and wastewater with activated sludge mixed conditions, thus all kinds of organic matter degradation of the water reach the purpose of sewage purification, can also have the effect of stirring, There are electroplating tank liquid stirring, aquaculture, are to play the same role.
With the progress and development of The Times, people are not satisfied with the pressure and air volume requirements of the centrifugal air pump, and the noise of the centrifugal air pump has become a headache in the factory. Therefore, Japan first launched the full closed flow measuring fan, which is now the side channel blower (vortex vacuum pump). This fan with its fine and small appearance and noise, for the first time to meet the social demand for high pressure fans. Later, the fan has been upgraded, has developed to a single section, double section, three section impeller side channel blower, and the maximum pressure of the side channel blower once refreshed to 230kpa, but this is only as the ultimate pressure of the fan. A large number of fan use, all kinds of different equipment has a standard process of its operation, through a large number of experimental data we know that the exhaust pressure of high pressure fan (vacuum) increases, the flow of high pressure blower decreases, the shaft power rises, the total efficiency curve is parabolic, and there is a highest point. In the working curve of side channel blower, we can clearly see that the efficiency of side channel blower is low under positive pressure air supply condition, and the highest efficiency is only 44%. However, the efficiency of side channel blower is even lower under suction condition, and the highest efficiency is only 32%.
Therefore, sometimes side channel blower can be used as coarse vacuum generation device. Fan has got the popularity of the application of high pressure, it is widely used in industry and agriculture, infrastructure construction, environmental protection industry, the automotive industry, electroplating industry, aquaculture, industrial dust, packaging machinery, printing machinery industry, plastics industry, chemical industry, food, pharmaceutical, medical, electrical and electronic, light industry, textile, shipping and railway, aerospace engineering, Make our world greener.