Brief description of the types and characteristics of industrial fans
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Industrial fans are not a precise concept of fans. Fans are classified according to their areas of use, and can be divided into small household fans, commercial fans, and industrial fans. Therefore, Jingbo Cloud Commerce considers industrial fans to be those fans that are not small household or commercial fans. Industrial fans include types such as centrifugal compressors, centrifugal ventilators, axial flow fans, Roots blowers, roof fans, dust extraction fans, high-temperature fans, air conditioning fans, power plant fans, fire protection fans, mine fans, sewage treatment fans, tobacco processing fans, grain handling fans, marine fans, and boiler draft and supply fans. Industrial fans are often used in various high-load working environments; therefore, their design must focus on durability and operational safety and reliability. High-quality materials with appropriate dimensions and thicknesses are used in their manufacture, which gives industrial fans decisive advantages over commercial and household fans in terms of structure, material quality, and service life. During operation, industrial fans are usually running at high speeds, which places high demands on their bearings. Generally speaking, the bearings used in industrial fans are significantly superior to those used in the other two types of fans, offering better performance in terms of strength, wear resistance, and temperature tolerance, allowing them to operate for extended periods in complex and difficult-to-maintain environments.
Introduction to the working principle and operation process of rotary fans. Working principle of rotary fans: When the rotor, which is mounted eccentrically within the cylinder body, rotates, it causes the 4 blades located in the rotor slots to move back and forth, thereby drawing in air, compressing it, and then expelling it. Friction between the fan blades, the rotor, and the cylinder body generates heat. Therefore, when the fan is in operation, the necessary lubricating oil is dripped into the cylinder through the oil drip nozzle, thereby lubricating the surfaces, reducing frictional heat and frictional noise, and creating an oil film between the components to maintain the fan’s sealing performance. The lubrication system is a circulation device that automatically supplies oil by utilizing the pressure difference generated when the fan is in operation. The operating process of a rotary fan consists of three stages: the intake stage, the compression stage, and the exhaust stage. Before the fan starts operating, there is a certain amount of air in the crescent-shaped chamber. As the fan moves in a certain direction (during the compression stage), the air in the chamber is compressed. The fan continues to operate, causing the sealed space to become smaller further, and the air continues to be compressed, resulting in an increase in air pressure. As the air in the chamber approaches the exhaust port, the space becomes even smaller, and the pressure rises far above atmospheric pressure; at this point, the air is expelled. At this stage, negative pressure exists in the chamber. When the fan moves back to the intake port, the intake process repeats itself. These four stages repeat continuously, allowing the rotary fan to discharge air continuously. Since rotary fans generate airflow and pressure through changes in the volume within their chamber, they are also known as variable-volume compression blowers. Rotary fan