Centrifugal fans are auxiliary production equipment commonly used in stone processing enterprises. They are mainly used in ventilation and dust removal devices, such as cyclones and bag dusters in the stone cutting and grinding processes. All need to use centrifugal fans to remove dust from the production site to ensure that The production environment is clean and protects the physical and mental health of producers. Fan is a kind of equipment with high energy consumption, and the power resource of consumption fan is larger in stone processing. With the current shortage of energy in China and the popularization and application of high-yield and high-efficiency working surfaces, energy conservation and consumption reduction have become a common concern of stone manufacturing enterprises. Many stone manufacturing enterprises take reducing power consumption of fans as an important task at present. In addition to reducing the power consumption of the fan, in addition to improving the efficiency of the fan itself, it is most important to use a reasonable adjustment method for the fan.
For relatively high static pressure requirements, the use of a centrifuge is the right choice, it is suitable for long wall working surfaces. The length and strike dimensions of the longwall face in the United States have increased to a particularly large extent. Even air currents pass through the goafs using the big fallout method. Of course, the goaf has a high coefficient of friction. The main fans of coal mines in the United States are mainly axial fans. To meet the ventilation needs, they must generate very high static pressure. In some coal mines, the main fan is mainly an axial fan. In order to meet the ventilation requirements, a very high static pressure must be generated. Some coal mines have tried high-speed axial fans. Practice has shown that axial flow fans are noisy and unstable; the most common failures are damage to fan blades and bearings.
The centrifugal fan is essentially a variable flow constant pressure device. When the speed is constant, the theoretical pressure-flow curve of the centrifugal fan should be a straight line. Due to internal losses, the actual characteristic curve is curved. The pressure generated in centrifugal fans is greatly affected by changes in intake air temperature or density. For a given intake volume, the lowest pressure is generated at the highest intake temperature (lowest air density). For a given pressure and flow characteristic curve, there is a power and flow characteristic curve. When the blower is running at a constant speed, for a given flow, the required power increases as the intake air temperature decreases.
The development potential of China's fan industry is huge. Enterprises have continuously improved their production and product design technology. In recent years, they have also made greater strides in automation to increase efficiency and competitiveness. However, they are also facing great challenges along with the opportunities. Various fields such as factories, mines, and residences have raised higher requirements for the fan industry. For example, large-scale infrastructure projects now use less domestic equipment for fans. Facing such a situation, China's wind turbine industry should calmly, calmly, and actively respond to meet the needs of the industry to the maximum, so that the domestic wind turbine industry can develop better in the future. The centrifugal fan is a machine that relies on the input mechanical energy to increase the pressure of the gas and discharge the gas. It is a driven fluid machine. Widely used in ventilation, dust extraction and cooling of factories, mines, tunnels, cooling towers, vehicles, ships and buildings; ventilation and induction of boilers and industrial furnaces; cooling and ventilation in air conditioning equipment and household appliances; Grain drying and delivery; wind tunnel wind source and hovercraft inflation and propulsion.
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