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[Did You Know About Cooling?] Why do cooling fans fail?

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News Center

Industry Trends

Release time:

2019-06-10

As required by machinery and equipment, Cooling fan Applied in multiple fields, normal heat dissipation by fans is essential to ensure the proper operation of machinery; otherwise, various malfunctions—such as equipment shutdown—may occur. Therefore, to reduce the likelihood of failures, we need to understand the root causes of these malfunctions and address them promptly. So, why do cooling fans fail in the first place?
First, due to the design of the cooling fan:
The cooling fan engineer’s improper design failed to take into account the proper fit and alignment of the components, resulting in poor dynamic characteristics and causing vibrations or noise during machine operation. The structure is unreasonable, and the inappropriate use of steel leads to stress concentrations, making the fuselage material prone to cracking. Additionally, the substandard material quality of the parts fails to meet the required strength standards, increasing the likelihood of accidents during use.
Second, reasons for the deterioration of the cooling fan itself:
Long-term operation of the machine causes fatigue in components such as shafts, leading to localized damage to the rotor. Additionally, under the impact of external forces, components may suffer surface pitting and partial wear.
Third, reasons for improper operation of the cooling fan:
When the machine’s process parameters deviate significantly from their designed values, the machine often ends up operating at speeds or loads that exceed its design specifications—or, conversely, at speeds or loads that are too low—thus failing to achieve its intended operational performance. Moreover, if the operating point approaches or falls into the critical speed range, the lubrication or cooling of the cooling fans may be inadequate. Improper handling during machine startup, shutdown, or speed-up and speed-down procedures can result in insufficient body temperature, uneven thermal expansion, or even overheating, leading to annealing of the machine components and a loss of their inherent strength.
Fourth, reasons for the installation and maintenance of cooling fans:
Improper installation of cooling fans in mechanical equipment, misalignment of components, or poor shaft alignment can result in excessive preload, improper rotor positioning, and failure to perform maintenance according to regulations, thereby disrupting the machine’s original fit and assembly relationships.
Shenzhen Jiangshanlai Electronic Technology Co., Ltd. was founded in 2005 in Shenzhen, China. It is a large-scale enterprise integrating customization, R&D, manufacturing, sales, and service of DC brushless motors, DC cooling fans, cooling fans, DC brushless fans, DC stand fans, boosted cooling fans, miniature cooling fans, DC cooling fans, DC blowers, and non-standard fans. We are a wholesale manufacturer and supplier of DC fans. Our products are best-selling in Guangdong Province—including Shenzhen, Guangzhou, and Dongguan—as well as in Fujian, Zhejiang, and Jiangsu provinces.
 

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