Fan selection
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Fan selection
The science of fan selection affects the quality of the product and must be fully considered for reliability, economics, and product viability. This is why you need to understand the various characteristics of fans.
The selection process is as follows: voltage, cooling effect, noise, price affecting design and air volume size affecting price (margin, need to consider static pressure, ambient temperature rise, temperature control, etc.) Price, noise (needs impact installation method, considering size, etc.) price, (necessary design life, use environment, etc.) reliability life impact impact bearing reliability, price and It is necessary to fully consider the actual usage environment (high temperature, high humidity, vibration, dust, dust, noise, etc. must be considered). When designing a model that takes into account multiple proposals, it is easier to design, devices that cannot be supplied such as discovered and many engineers, thereby shortening the development cycle, reducing costs and improving reliability Designed.
Case 1: The amount of dust emitted by the fan in the clean room must be accounted for. The dust generated by the fan itself is mainly generated by the volatilization of the bearing lubricating oil. In this case, the lowest possible oil content and ball bearings should be used. At the same time, they need to be satisfied. In the case of air flow, reduce the speed as much as possible.
Case 2: Fans working in a communication cabinet must consider power supply voltage and dust, temperature rise, and environmental life. In this case, ball bearings should be used whenever possible.
Case 3: Working on a locomotive, the power supply fan must consider the temperature rise, the vibration of life and the environment. When selecting a ball bearing, the vibration conditions must be met. In the case of vibrations, oil impregnation must be selected to meet the reliability requirements.
Case 4. Fans working in the treatment room must consider noise. At this time, consider selecting a large size, low noise, oil-impregnated bearing.