The drive shaft of the cooling tower fan in our factory has developed cracks. Could everyone help analyze what might be the cause?
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The drive shaft of the cooling tower fan in our factory has developed cracks. Could everyone help analyze what might be the cause?
What material is it made of – stainless steel or carbon fiber? It might be caused by excessive torque; to find out for sure, one needs to check whether the current flowing through the cooling tower motor is too high, and whether the angle of the fan blades is too large Another reason is the increased density of air currents in winter (the most unfavorable operating conditions for cooling towers occur in summer, when the air current density is lower than in winter), which leads to an abnormally high shaft power requirement on the fans. The resulting high torque, combined with insufficient material strength, causes cracks to form.
I agree with the person above; the cooling tower fans in our factory are also driven by long drive shafts. We should check the records in the reports to see if there were any changes in the current and the oil temperature inside the reduction gearbox before the failure occurred. Additionally, the angle of the fan blades varies between summer and winter, and adjustments need to be made
As an additional point, how long has that drive shaft been in use? Is it possible that there is a problem with the spare parts for the drive shaft, such as incorrect metal composition? Our factory has encountered situations where spare parts with improper material quality caused problems after being used for only a short time; during that period, the equipment had to be repaired frequently, and it was only then that the issue stemmed from the poor quality of the spare parts.
1. Check the alignment to see if the shaft has moved radially. 2. Generally, it is necessary to inspect the elastic blocks of the coupling. 3. Check for any abnormalities in the gear area
I agree with what the gentleman on the fourth floor said. It’s possible that the different materials of the spare parts are responsible for an imbalance in the dynamic balance of the drive shaft, leading to uneven stress distribution and cracks. It’s also worth checking whether the bolts or elastic diaphragms connecting the drive shaft are misaligned or loose, as this can result in poor coaxiality of the shaft, which in turn can cause cracks in the drive shaft or even lead to accidents involving the shaft coming loose.
Is it an axial crack or a circumferential crack?
Can the original poster upload a picture? This way, everyone can analyze it better.