In 1862, the British Guibell invented the centrifugal fan. Its impeller and casing are concentric, the casing is made of bricks, and the wooden impeller adopts straight backward blades. The efficiency is only about 40%. It is mainly used for mine ventilation.

In 1880, people designed a volute-shaped casing for mine exhaust and air supply, and a centrifugal fan with backward curved blades, and the structure has been relatively complete.

In 1892, France developed a cross-flow fan.

In 1898, the Irish designed a Sirocco centrifugal fan with forward blades, which was widely used in various countries; in the 19th century, axial flow fans have been used in mine ventilation and metallurgical industry blowing, but the pressure is only 100-300. Pa, the efficiency is only 15-25%, and it was not developed rapidly until after the 1940s.

In 1935, Germany first used axial-flow isobaric fans to ventilate and induce air for boilers

In 1948, Denmark made axial fans with adjustable blades in operation; rotary axial fans, radial acceleration axial fans, diagonal fans and cross-flow fans

In 2002, China's explosion-proof centrifugal fans were widely used in chemical, petroleum, machinery and other fields, and Changlindong explosion-proof centrifugal fans were also developed.

Centrifugal fans are commonly used auxiliary production equipment in stone processing enterprises. They are mainly used in ventilation and dust removal devices. For example, cyclone dust collectors and bag dust collectors in stone cutting and grinding processes need to use centrifugal fans to dedust the production site to ensure production. A clean environment protects the physical and mental health of producers.

Fan is a kind of high-energy-consuming equipment, and the proportion of power resources consuming heart fan is relatively large in stone processing. A common concern of enterprises, many stone manufacturers regard reducing the power consumption of fans as an important task at present. In addition to improving the efficiency of the fan itself, reducing the power consumption of the fan is the most important thing to choose the adjustment method of the fan reasonably. Because the load of stone production changes with the needs of the process, most fans need to adjust the flow according to the load of the main and negative machines. .

At present, the energy-saving adjustment methods of fans in stone processing enterprises are relatively old, and throttling adjustment is generally used. When throttling is used, the flow of the fan is mainly adjusted by the regulating valve or the throttling baffle. The throttling of the fan is large, and even more than 50% at low load. The energy waste is very serious. If the speed of the fan is adjusted, the throttling loss can be eliminated, and the fan can always run in the high-efficiency area, so the power can be greatly saved. It can be said that adjusting the speed of the fan to run the fan is an effective way to save energy, which reflects the new trend of the current building materials industry production.

Youcheng Zhixin Company is a professional manufacturer integrating independent research and development, design, production and sales. Specializing in the production of regular centrifuges, welcome to visit our website or contact us.