Centrifugal fans troubleshooting and maintenance methods, such as Paul debugging centrifugal fans

Centrifugal fans troubleshooting and maintenance methods, such as Paul debugging centrifugal fan centrifugal fan manufacturers domestic space industry's main products are large-scale industrial drum [4] fan, fan, gas blower, coke oven blowers, multistage high-pressure centrifugal blower, single-stage high-speed centrifugal blowers and more than 50 series 400 kinds of specifications of the energy-saving centrifugal fan products, widely used in iron and steel smelting, power generation, dry cement, petrochemicals, sewage treatment, waste heat recovery, gas recovery and nuclear power and other fields. Common types of commonly used centrifugal fan types are as follows: [5] 1, 2 industrial centrifugal fans, dust / environmental blower 3, corrosion / explosion-proof fan 4, high temperature boiler induced draft fan centrifugal fan is a complex structure of the equipment, the main air inlet, valve, impeller, motor, the outlet composition. In different states, the effect is not the same centrifugal fan. Therefore, different operating conditions section is not uniform, the effect of centrifugal fans will be affected. The centrifugal fan debugging to the best condition, it can start from several aspects. 1, centrifugal fans allow full pressure start or step-down power, it should be noted that current at full voltage starting time 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, when the centrifugal fan test, should carefully read the product manual, check the wiring method is consistent with the wiring diagram; should carefully check the operating voltage of the power supply fan is not met, the power is the same phase or phase, the distribution of the electrical components capacity to meet the requirements. 3, the test is not less than the number two, a controlled power supply, one fan running observe, abnormal phenomenon 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, should be down to check. After running for five minutes, the fan down to check whether there is abnormal phenomenon, confirmed that no anomalies start running again. 4, two-speed centrifugal fan test, you should start low, check the rotation direction is correct; it must be at the start and then start high-speed fan still prevent reverse rotation speed, causing the switch trips and motor damage. 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 is required to refer certain conditions, for centrifugal fan and wind chassis, the required high power inlet fully open. If the inlet operated fully open, there is risk of damage the motor. When the fan is best to test the fan inlet or outlet valve on the pipeline closed, will gradually open the valve operation, until the desired working conditions, and pay attention to the fan operating current exceeds the rated current. ? Centrifugal fan troubleshooting and maintenance methods, such as Paul debugging centrifugal fans