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[Do you know about heat dissipation] Why does the heat dissipation fan fail?

Release time:

2019-06-10

With the needs of machinery and equipment, cooling fans are applied in many fields. Generally, the normal heat removal of the fan can ensure the operation of the machine. Otherwise, various failures will occur, such as the shutdown of machinery and equipment. Therefore, in order to reduce the occurrence of failures, we must understand the cause of the failure and deal with it in time. Then why does the cooling fan fail? First, the cooling fan design reasons: the cooling fan engineer improper design, in the design did not take into account the coordination of parts, poor dynamic characteristics, resulting in vibration or noise when the machine is running. The structure is unreasonable, the use of steel is not appropriate, resulting in stress concentration, the fuselage material is prone to crack

With the need for machinery and equipment,Cooling fanIt is applied in many fields. Generally, the normal heat removal of the fan can ensure the operation of the machine. Otherwise, various failures will occur, such as the stop of the operation of the machine and equipment. Therefore, in order to reduce the occurrence of the failure, we must understand the cause of the failure and deal with it in time. Why does the heat dissipation fan fail?
First, the cooling fan design reasons:
The cooling fan engineer did not design properly, did not take into account the coordination of the parts in the design, and the dynamic characteristics were poor, resulting in vibration or noise when the machine was running. The structure is unreasonable, the use of steel is inappropriate, resulting in stress concentration, the body material is prone to cracks, the material of the parts is not good, the strength cannot meet the standard, and accidents are prone to occur during use.
Second, the reasons for the deterioration of the cooling fan itself:
The long-term operation of the machine causes fatigue of the shaft and other parts, causing local damage to the rotor, and the parts are affected by the impact force to produce surface pitting and part wear.
Third, the heat dissipation fan improper operation reasons:
The process parameters of the machine are far away from the design values, which often makes the machine maintain over-speed, over-load operation, or low-speed, low-load operation during operation, and cannot achieve the working performance of the machine. The operation point is close to or falls into the critical speed zone, and the lubrication or cooling of the heat dissipation fan is not in place. Improper operation in the process of starting and stopping the machine or in the process of speed increase and decrease, resulting in temperature of uneven thermal expansion, or the temperature overheating causes the machine to anneal and lose the strength it should have.
Fourth, the cooling fan installation and maintenance reasons:
The cooling fan is improperly installed in the mechanical equipment, the parts are misplaced, or the shaft system is not aligned properly, resulting in large preload, improper placement of the rotor, failure to carry out maintenance according to regulations, and damage the original coordination system of the machine.
Shenzhen Jiangshanlai Electronic Technology Co., Ltd. was founded in Shenzhen, China in 2005. It is a large-scale enterprise specializing in the customization, research and development, manufacturing, sales and service of DC brushless motors, DC cooling fans, cooling fans, cooling fans, DC brushless fans, DC bracket fans, pressurized cooling fans, micro cooling fans, DC blowers, and non-standard fans, DC fan wholesale manufacturers and DC fan suppliers. Products sell well in Guangdong, Shenzhen, Guangzhou, Dongguan, Fujian, Zhejiang, Jiangsu and other places.
 

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