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Preliminary work before the equipment for energy-saving knowledge of axial flow fans in the sea

Release Time：2021-07-20

Centrifugal axial flow fan is a tense tool for fan energy saving. The principle of single-stage high-speed centrifugal fan is: the original idea is to reverse the process shaft to drive the impeller to twist at high speed. The airflow enters the high-speed twisted impeller from the inlet axial direction and then causes radial motion to be accelerated. Then it enters the diffuser chamber to change the motion bias and accelerate. This kind of acceleration effect converts the kinetic energy possessed in the high-speed twisted airflow into pressure energy (potential energy), make the fan inlet adhere to a stable pressure.
Axial flow fan is the airflow in the same direction as the axis of the fan blade, such as electric fan. The fan outside the air conditioner is the fan working by axial flow method. The reason why it is called "axial flow" is that the gas moves parallel to the shaft of the fan. Axial flow fan is usually used in occasions with higher flow demand and lower pressure demand. Axial flow fan fixes the position and moves the air.
Axial flow fans are used in many industrial production, perhaps because the machine is relatively large, and there are often more or less doubts in ordinary use. The following is a list of some common axial flow fan defects and a brief analysis of the factors that cause the defects. Rotor defects, such as rotor imbalance, rotor vibration, etc., are the most serious and even impeller speeding incidents.
Blade wear occurs primarily on the induced draft fan, because the electrostatic precipitator is not well grasped or the electrostatic precipitator is defective, which constitutes induced draft fan wear. Axial flow fan is the most simple defect of induced draft fan in coal-fired power station. The primary question is still the poor forging quality of the blade itself.
Preparation before equipment.
1. Before the equipment, you should fully understand the instructions of the axial flow fan and clarify the ventilation system drawings of the fan operation. After the equipment arrives, you should unpack to check whether all parts of the fan are complete and whether the outside of the casing is bruised. Special attention should be paid to whether the head rectifier is bruised and deformed, whether the parts are closely connected, whether the blades and motors are damaged, and whether the impeller is rolling. If problems are found, you should be repaired and replaced in time.
2. The axial flow fan should check the equipment foundation of the fan: it must have satisfactory strength and rigidity to ensure that the load during the operation of the fan can be accepted. Together, it is necessary to check whether the connection specification between the foundation and the fan is in line with the plan. The requirements are as follows: the embedded parts of the concrete foundation, the specification of the hole opening, etc., the equipment foundation should not have cracks, falling and steel bar exposure, and the elevation, the center line, etc. shall be within the scope of the promised fault of the rules of the skill document.
3. Bottom setting-out: It is necessary for axial flow fan to measure the coordinates and horizontal elevation points supplied by civil engineering according to drawings, use level gauge and total station to measure the elevation and coordinates of each equipment point and make symbols, and release the cross center line of each equipment position according to the axis.
Shandong Xingheng Environmental Technology Group Co., Ltd. is located in Luquantun Development Zone, Dezhou, Shandong, the hometown of FRP in China. The company has Grade II qualification for fire protection facilities engineering, Grade II qualification for construction mechanical and electrical installation engineering, Grade II qualification for environmental protection engineering, and safety production license. It is the first in the industry to pass ISO9001 quality management system certification, ISO14001 environmental management system certification, OHSAS18001 occupational health management system certification, and an axial fan invention patent, A fan utility model patent, environmental assessment, safety assessment, three simultaneous and other procedures are complete.