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Jingzhou brand blower selection

Release time: 2020-02-08 17:24:53

The working principle of a centrifugal fan is basically the same as that of a turbo compressor, but because the gas flow rate is low and the pressure does not change much, it is generally not necessary to consider the change of the specific volume of the gas, that is, the gas is treated as an incompressible fluid. The centrifugal fan is based on the principle of converting kinetic energy into potential energy, using a high-speed rotating impeller to accelerate the gas, then decelerating and changing the flow direction, so that the kinetic energy is converted into potential energy (pressure).

The boiler fan sprays at a high speed on the unprocessed surface of the blade, and the blades of the fan are sprayed in turn every turn of the blade ring. This can effectively solve the problem of ash vibration inside the fan.

Anti-corrosion and explosion-proof axial flow fans adopt anti-corrosion materials and explosion-proof measures, and are matched with explosion-proof motors. They can be used to transport explosive, volatile, and corrosive gases.

As a kind of general machinery, centrifugal blowers are widely used, and are widely used in power, steel, petrochemical, coal, construction and other industries. Due to the limited flow and pressure provided by the single-stage centrifugal blower, multi-stage centrifugal blowers are required to improve the gas transportation capacity in the occasions with high pressure requirements. At present, many scholars at home and abroad have conducted in-depth research on the performance and structure of single-stage centrifugal blowers, and have achieved many results. However, there are few studies on multi-stage centrifugal blowers. In terms of structure, multi-stage centrifugal blowers are also different from single-stage centrifugal blowers, so it is necessary to conduct in-depth research on multi-stage centrifugal blowers. Based on this, the author uses a numerical simulation method, using CFX as a tool, to perform a three-dimensional numerical simulation of a two-stage centrifugal blower, captures the detailed flow characteristics inside the multi-stage blower, and predicts the performance curve of the blower. The internal flow field of the recirculator found that there was a relatively serious flow separation in the flow channel of the recirculator, which resulted in a design defect that reduced the effective flow area. It was pointed out that by reducing the inlet installation angle of the recirculator blade and reducing the arc of the recirculator blade The method of radius improves the structure of the return flow to achieve the purpose of improving the product of the multi-stage centrifugal blower.

There are two types of ventilators for atomic power furnaces: centrifugal and axial flow. Its air volume is small, between 850-1400m³ / min, and the wind pressure is low. Considering the safe operation of the nuclear power generation furnace to prevent failures, special attention should be paid to the manufacturing quality and correct operation of the fan.

The use of high-pressure fans for heat dissipation determines the performance of the fans, and performance determines the manufacturing. Therefore, the use of heat dissipation high pressure blower is the first consideration in the selection. The use of cooling high-pressure blowers is directly related to the state of the gas delivered by the cooling fan. The physical conditions and chemical properties of the gas are different, and the type of cooling fan used is also very different. The environment for setting up a factory should choose an efficient high-pressure blower such as heat If the gas conveyed by the fan contains a large amount of dust or pulverized coal, choose a dust exhaust and pulverized coal radiating fan; when the gas to be radiated by the high-pressure blower is relatively corrosive, choose an anticorrosive radiating fan; work under high temperature conditions Or transport high temperature gas, choose high temperature and heat resistant high pressure blower.

Axial fan can be used for ventilation, ventilation or heat dissipation in places such as metallurgy, chemical industry, light industry, food, medicine and civil buildings. If the casing is removed, it can also be used as a free fan, and it can also be used for longer exhaust. The inner space of the pipeline is installed in series to increase the wind pressure in the pipeline.

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