China quality centrifugal fan

Centrifugal fan

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. After the air flow into the fan axial impeller along the main radial flow. Such a centrifugal fan according to the principle of action made products, including centrifugal fan, centrifugal blowers and centrifugal compressors. Centrifugal fan is a complex structure of the equipment, the main air inlet valve, impeller, motor, the outlet composition. In different states, the effect of centrifugal fan is not the same. Therefore, different operating conditions partly dissenting, centrifugal fan effect will be affected. The centrifugal fan debugging to the best condition, can start from several aspects. 1, centrifugal fans allow full pressure start or step-down power, it should be noted that the current full voltage starting is about 5-7 times the rated current, voltage starting torque is proportional to the square of the voltage, when there is insufficient network capacity, should step-down start. 2, centrifugal fan during commissioning, should carefully read the product manual, check the wiring method if the same wiring diagram is consistent; should carefully check the supply fan power supply operating voltage is not meet the requirements, whether the power phase or same phase, electrical components are assigned capacity to meet the requirements. 3, the number of test less than two, one to control power, fans observed a man running, and found anomalies immediately stop inspection; First check the direction of rotation is correct; after centrifugal fan starts running, you should immediately check the operating current of each phase is balanced the current exceeds the rated current; if not normal, you should stop to check. After running for five minutes, the fan down to check whether there are anomalies, confirming that no anomalies and then start running. 4, two-speed centrifugal fan test, it should start low, check the direction of rotation is correct; must be stationary when starting the fan speed and then start to prevent high-speed reverse rotation, causing damage to the motor and switch tripping. 5, when the centrifugal fan up to speed, the fan should be measured input current is normal, centrifugal fan operating current can not exceed the rated current. If the operating current exceeds the rated current, should check the supply voltage is normal. 6, centrifugal fan motor power required is defined as the condition of the centrifugal fan and wind chassis, the required high power inlet fully open. If the air inlet fully open operation performed, the risk of damage to the motor. When the fan is best to test the fan inlet or outlet valve on the pipeline closed, the operation will gradually open the valve, until the desired working conditions, and pay attention to the fan operating current exceeds the rated current. When installing wind cabinet, subject to the following requirements: 1. When used for fire, the exhaust port and smoke machines should be interlocked, when any one of the exhaust ports open, smoke machine that is able to automatically start 2 The fan installation ambient gas entrained sticky substances, dust and hard particle content should not be greater than 150mg / m3. When the fire smoke is not required 3. Install the fan should have a damping device, install ceiling should be securely fastened. 4. When use power outlet, the fan power cable should be connected with compliance with safety standards plug; when the fan power cable is connected directly to the power line; power supply line should be fitted with a contact separation of at least 3mm all-pole power switch. Distribution should be installed motor protection devices. 7.5Kw motor should have more power down and start-up device.

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