文章來源： 作者：羅茨機電 發布時間：2022-02-14 瀏覽次數：568
During the mechanical commissioning of Jinan fan, carefully read the product manual and check whether the wiring mode is consistent with the wiring diagram; Carefully check whether the working voltage of fan power supply meets the requirements, whether the power supply is out of phase or in phase, and whether the capacity of electrical components meets the requirements.
It is recommended that there should be at least two people during commissioning, one to control the power supply and one to observe the operation of the fan. In case of any abnormality, stop the machine immediately for inspection; First, check whether the rotation direction is correct; After the fan starts to operate, immediately check whether the operating current of each phase is balanced and whether it is greater than the rated current; In case of any abnormality, stop the machine for inspection. After 5 minutes of operation, shut down the fan, check whether there is any abnormality, and start the operation after confirming that there is no abnormality
Pre startup inspection:
Check whether the anchor bolts, fan main body, accessories and connectors of the pipeline are fastened, and whether the bolts and nuts are evenly locked to avoid local over tightening or over loosening.
Check whether there are foreign matters inside the centrifugal fan and pipeline. Whether tools or other sundries are forgotten during installation; Whether there are dangerous factors near the inlet and outlet of the fan.
For the fan with water-cooled bearing, check whether the water supply of the cooling water pipeline is normal.
For the fan driven by coupling or belt, check whether the installation of coupling or belt pulley is reliable and whether the tension of V-belt is appropriate
After completing the above procedures and confirming that all items are normal, the fan can be started for trial operation.
Turn on the power switch for 3 ~ 6 seconds, cut off the power immediately, and confirm whether the air flow direction of the fan and the rotation direction of the impeller are correct; Pay attention to observe whether there is abnormal sound, vibration, etc. if there is any abnormality, recheck and correct the unit according to the above process before trial operation.
Generally, when the fan is started, the instantaneous current of the motor is 5 ~ 7 times of its rated current, and then gradually decreases and stabilizes. If the current drops too slowly, stop the operation and check the power supply system of the motor.
For units equipped with regulating valves, the opening and closing degree shall be gradually adjusted to the appropriate flow after startup. At the same time, pay attention to the change of current to ensure the no-load operation of the motor.
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