Keywords: Fan shaft, use, life, bending, sealing, recirculation cooling, cooling water, fan blade shaft, stainless steel shaft, recirculation water, furnace accessories,

Fan shaft use and maintenance

Reasons for fan shaft bending or short life: 

    1. circulating cooling water is not enough, the water temperature is too high, or the circulating water is turned on late or off early;

    2. irrational selection of materials, high temperature and strong bottom;

    3. unbalanced operation, the weight of each fan wing is not equal. 4. poor sealing at the journal;

    4. poor sealing at the journal;

    5. poor assembly;

    6. Shaft deflection greater than 0.05mm;

Troubleshooting methods for bent or short-lived fan shafts: 

    1. turn on the circulating water when the industrial furnace is warmed up to above 400℃, and turn off the circulating water when the furnace is stopped and cooled down to below 300℃;

    2. choose high-temperature strength, creep and oxidation of the heat-strengthened steel is good, such as Cr-Mn-N steel or Cr23Ni18, etc.;

    3. the mass error of each fan wing is not more than 10g, weld a little less, more drill a hole (non-stressed place);

    4. fan assembly, balance test balance when you can use your hands to touch the motor, feel the vibration is not too much, you can think that the balance is reasonable, otherwise re-verify;

    5. Processing assembly, sealing to meet the technical requirements. 

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