The pressure generated by the outer rotor centrifugal fan is affected by the change in intake temperature or density. For a given intake, the pressure is lowered at the time of the highest intake temperature (the air density). For a given pressure and flow characteristic curve, there is a power and flow characteristic curve. When the blower operates constant speed For a given flow, the required power is raised as the air temperature is lowered. The essence of the centrifugal fan is a variable flow constant voltage device. Compact Fan Heater When the speed is constant, the pressure-flow theory curve of the centrifugal fan should be a straight line. Due to internal losses, the actual characteristic curve is curved.
Contemporary Western countries use a high-molecular composite repair method for the above problems, and more applications are the United States, the United States, which has superior adhesion, excellent compressive strength, etc., free of disassembly Processing. The wear of the centrifugal fan transmission is often the equipment problem, including the winding machine bearing, bearing chamber wear, blower shaft bearing wear. For the above failure of the centrifugal fan, the traditional maintenance method has a surfacing, thermal spraying, electrical brush, etc., but there is a certain drawback: the thermal stress generated by the soldering high temperature cannot be completely eliminated, which is easy to cause material damage, resulting in bending or fracture of the components; The brush-plating is limited by the thickness of the coating, and it is easy to peel off, and the above two methods are metal repair metal, which cannot change the cooperation of "hard to hard". Under the integration of all force, it will still cause incluscal rollers. Wear again.
The outer rotor centrifugal fan is mechanical energy that relies on the increasing input of the pressure. It is mainly in the impeller, followed by the expansion process. In multi-stage centrifugal wind turbines, the airflow into the next impeller with a backflow, producing higher pressure. Improve gas pressure and discharge gas, it is a substantive fluid machine. Centrifugal winds are widely used in factory, mines, tunnels, cooling towers, vehicles, ships, and buildings; ventilation and ventilation in boilers and industrial furnaces; cooling and cooling in air regulation equipment and household appliances Ventilation; drying and delivery of cereals; wind tunneling and inflatable and advancement of hovercraft. The centrifugal fan is based on the principle of power energy conversion, and the gas changes the direction of flow caused to decelerate, which converts kinetic energy into pressure. The pressure increase is mainly in the impeller, followed by the expansion process. In multi-stage centrifugal wind turbines, the airflow into the next impeller with a backflow, producing higher pressure. The gas accelerates with high-speed rotating impelings, then decelerate, change the flow direction, and cause the kinetic energy to convert to potential energy (pressure). In a single-stage centrifugal fan, the gas into the impeller from the axial direction, and the gas flows through the impeller to turn into a radial direction, and then enter the expansionizer. In the expander, the gas changes the direction of flow caused to decelerate, which converts kinetic energy into pressure. The pressure increase is mainly in the impeller, followed by the expansion process. In multi-stage centrifugal wind turbines, the airflow into the next impeller with a backflow, producing higher pressure.
The working principle of the centrifuge fan is basically the same as the turbine compressor. Both the gas flow rate is low, the pressure varies is not large, and the gas specificity is changed, that is, the gas is used as a non-compressible fluid.