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What are the key considerations when selecting a fan?
The function of the fan is high-power range function, divided into five characteristics by flow rate. Selection should be based on the function table. The function of qualified fans should not exceed ±5% of the full pressure value at the rated flow rate. The function selection table is the function under standard conditions, standard atmospheric pressure 101325Pa, t=20, relative humidity Ψ=50% air state. The fan installation method can be vertical or horizontal.
Bearing temperature exceeding the limit is one of the main causes of bearing damage. The main reasons for the high bearing temperature are as follows: Poor lubrication quality. The purpose of lubrication is to prevent direct contact and collision between dynamic parts, forming a collision between solid and liquid. If the amount of lubricating oil is insufficient or the quality is poor, it will cause direct collision and heat generation between dynamic parts, or the heat cannot be taken away by the lubricating oil, resulting in an increase in bearing temperature.
Poor rolling bearing assembly quality. For example, the tightness between the inner sleeve and the shaft is insufficient, and the gap between the outer sleeve and the bearing seat is too large or too small. Poor bearing quality. Poor quality of sliding bearing scraping, poor contact between the babbitt and the shaft, or peeling; cracks, fragmentation, or peeling on the surface of the rolling element of the rolling bearing.
These will damage the stability and uniformity of the oil film, causing the bearing to heat up. The sealing felt is too tight and generates heat. Excessive bearing vibration and impact load seriously affect the stability of the lubricating oil film. Insufficient or interrupted bearing cooling water affects heat dissipation, causing the bearing temperature to rise.
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New Super-Aire Equipment Ltd.
Address: Laocun Industrial Zone, Sanle Road, Lecong Town, Shunde District, Foshan City, Guangdong Province
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