The function of the fan is the function of the high power range, according to the flow is divided into five characteristics, the selection of the function table shall prevail, the fan qualified function in the rated flow under the full pressure value of not more than ± 5%. Function selection table is the function of the standard state, the standard state atmospheric pressure 101325Pa, t = 20 relative temperature Ψ = 50% air state, fan installation can be divided into vertical or horizontal.
Bearing temperature overrun, is one of the main reasons for bearing damage. The main reasons for high bearing temperature are the following: poor smooth quality. The purpose of smooth, is to make the dynamic part of the conflict does not occur in direct contact, but constitute a conflict between solid and liquid. If the number of smooth oil or poor quality, will make the dynamic part of the direct conflict heat, or heat can not be taken away through the smooth oil, and the bearing temperature rise.
Tumbling bearing assembly quality is poor. Such as the inner sleeve and the shaft of the tight force can not, the jacket and bearing seat gap is too large or too small. Bearing quality is bad. Sliding bearing scraping research quality is poor, ugandan contact is not good or off; tumbling bearing tumbling decent has cracks, broken, flaking, etc..
All will damage the stability and uniformity of the oil film, the surface makes the bearing hot. The sealing felt is too tight and heats up. Bearing oscillation is too large and accept shock load, seriously affect the stability of the smooth oil film bearing cooling water lack or interruption, affect the heat carry out, and make the bearing temperature rise.
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