Common faults & solutions in roots blower openration of VPSA oxygen plant are listed below.
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Cause of fault |
Solution |
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• The oil level is too high, and the oil is too thick, dirty.
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Lower the oil level; replace the thick or dirty oil. |
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• The filter or muffler is clogged. |
Unclog the filter or muffler. |
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• The pressure is higher than the specified valve. |
Reduce the differential pressure across the blower. |
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• The impeller is excessively worn and the impeller clearance is large. |
Restore the impeller clearance. |
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• High inlet temperature caused by poor ventilation and high indoor temperature. |
Set vents to improve ventilation and lower the indoor temperature. |
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• The operating speed is too low, and the belt slips; |
Increase the operating speed to prevent the belt from slipping. |
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Cause of fault |
Solution |
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• Inlet air filter is clogged. |
Unclog the inlet air filter. |
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• The impeller is worn and the impeller clearance is too large. |
Repair the impeller to narrow down the impeller clearance. |
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• The belt slips. |
Tighten the belt and increase the number of belts. |
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• The loss of inlet pressure is high. |
Adjust the inlet pressure to the specified value. |
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• Pipeline leakages exist. |
Locate and repair the cracks. |
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Cause of fault |
Solution |
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• Inlet air filter is clogged. |
Unclog the inlet air filter. |
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• The impeller is worn and the impeller clearance is too large. |
Repair the impeller to narrow down the impeller clearance. |
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• The belt slips. |
Tighten the belt and increase the number of belts. |
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• The loss of inlet pressure is high. |
Adjust the inlet pressure to the specified value. |
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• Pipeline leakages exist. |
Locate and repair the cracks. |
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Cause of fault |
Solution |
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• The fuel level is too high, and the oil leaks out from the oil outlet. |
Lower the oil level. |
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• The seal is worn, causing oil leakage at the shaft end. |
Replace the seal. |
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• The pressure is higher than the specified value. |
Unclog vents. |
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• The vent connecting the wall panels and the tank is clogged, causing the oil leaking into the enclosure. |
Unclog the vent by opening the 2 mm cock below the wall panel. |
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Cause of fault |
Solution |
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• The rolling bear clearance exceeds the specified value or the bearing seat is worn. |
Replace the bearing or bearing housing. |
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• The backlash of the gear is too large, misaligned, and the fixing is not tight. |
Reinstall the gears and ensure proper gaps of gears. |
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• The impellers collide with each other or with the casing owing to the sucked-in dusts. |
Clean the impellers and check whether the casing is damaged. |
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• The impellers colide with the casing owing to overload and shaft deformation. |
Check the back pressure, the impeller alignment, adjust the impeller clearance. |
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• The inpeller and the casing are worn around the inlet. |
Check the filter and the back pressure, increase the gap between the impellers and the casing. |
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• The impellers are out of balance due to fouling or foreign matters. |
Clean the impellers and casing to ensure the proper working clearnce of the impellers. |
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• The anchor bolts and other fasteners are loose. |
Tighten the anchor bolts and level the foundation. |
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Cause of fault |
Solution |
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• The pressure difference (i.e. the back pressure, or the inlet pressure) is larger than the specified value. |
Lower the pressure to the specified value. |
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• The flow rate is higher than the capacity, causing excess pressure. |
Release excessive air or lower the blower speed. |