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The rapid debugging of industrial fans requires systematic preparation and efficient execution processes. The following are the key steps and precautions:
1、 Preparation before installation (to shorten the debugging time in the later stage)
Pre installation inspection
Check the fan model, power supply voltage (such as 380V/220V), and completeness of accessories (bolts, shock absorbers, control boxes, etc.).
Check the load-bearing capacity and levelness of the installation foundation (steel structure/concrete) to avoid rework.
Pre wiring and labeling
Complete the wiring of the control box power cord and frequency converter (if any) in advance, and mark the cables (such as U/V/W motor wires and grounding wires).
Set the parameters of the frequency converter (such as the rated power and speed curve of the motor) to default values, and make subsequent adjustments.
Tool Preparation
Essential tools: laser velocimeter, multimeter, infrared thermometer, vibration detector, wrench set.
2、 Quick debugging steps after installation
Mechanical inspection (within 10 minutes)
Concentricity calibration: Use a dial gauge to check the deviation between the motor shaft and the fan blade shaft (≤ 0.1mm).
Bolt tightening: Tighten the fan blade bolts in diagonal order (refer to the manufacturer's manual for torque, such as 40-50N · m for M12 bolts).
Manual turning: Rotate the fan blades 3-5 times to confirm that there is no jamming or abnormal noise.
Electrical Quick Test (5-minute)
Insulation test: Use a megohmmeter to measure the insulation resistance of the motor winding to ground (≥ 1M Ω).
Phase sequence detection: Start by tapping to observe the direction of the fan blades (it should be the design direction, otherwise switch any two phase lines).
Voltage detection: When unloaded, the three-phase voltage deviation is less than 5%.
Dynamic debugging (15 minutes)
Optimization of frequency converter parameters (if applicable):
Set the acceleration/deceleration time to 10-15 seconds (to avoid impact).
Adjust the carrier frequency to 8-12 kHz (to reduce motor noise).
Vibration test: When running to the rated speed, use a vibration meter to detect the vibration value of the bearing position (should be ≤ 2.8mm/s).
Temperature rise monitoring: Continuous operation for 30 minutes, motor temperature rise ≤ 70 ℃ (ambient temperature+temperature rise).
Intelligent control docking (optional)
If integrating PLC/IoT systems, control logic (such as timed start stop and wind speed grading) should be imported in advance.
Test the stability of RS485/wireless signals (such as Modbus protocol communication).
3、 Frequently Asked Questions Quick Reference Table
Possible causes of malfunction and quick solutions
Start tripping short circuit/overload check motor insulation, reset thermal relay
Excessive swing of fan blades leads to failure of dynamic balance/loosening of bolts, and dynamic balance needs to be redone (with the addition of counterweights)
Abnormal noise, bearing wear/blade deformation, bearing replacement (model such as 6206-2RS)
Inverter alarm E.OC1 acceleration overcurrent prolongs acceleration time or reduces torque boost
4、 Efficiency optimization techniques
Parallel homework: When the installation team fixes the mechanical structure, electricians synchronize the wiring.
Standardized process: Create a checklist for debugging and check each item for confirmation.
Remote support: Real time connection with manufacturer engineers through AR glasses to guide difficult problems.
Tip: For permanent magnet synchronous motor fans, additional attention should be paid to matching the back electromotive force parameters. If there is a lot of dust in the on-site environment, it is recommended to seal the junction box immediately after debugging.
