Common faults and troubleshooting methods of Roots blower

There are pollutants and impurities on the impeller, causing the gap to be too small; Clean up the dirt and inspect the interior for damage;

1. Impeller to impeller friction

(1) There are pollutants and impurities on the impeller, causing the gap to be too small; Clean up the dirt and inspect the interior for damage;

(2) Gear wear causes large backlash; Adjust the gear clearance. If the gear side clearance is greater than the average value by 30% to 50%, the gear should be replaced;

(3) The gear is not firmly fixed and cannot keep the impeller synchronized; Reassemble the gears and maintain a taper fit with a contact area of 75%;

(4) Wear of bearings leads to increased clearance. Replace bearings.

2. Impeller and wall panel, impeller top and casing

(1) Incorrect installation clearance; Readjust the gap;

(2) The operating pressure is too high, exceeding the specified value; Identify the cause of overload and reduce the pressure to the specified value;

(3) The operating temperature is too high; Check installation accuracy and reduce pipeline tension;

(4) Deformation of the casing or base, failure of fan positioning; Check and repair the bearings and ensure clearance.

(5) Poor axial positioning of bearings.

3. Excessive temperature

(1) Too much, too thick, and dirty oil in the fuel tank; Lowering the oil level or carrying oil;

(2) Filter or muffler blockage; Clean up blockages;

(3) The pressure is higher than the specified value; Reduce the pressure difference through the blower;

(4) Excessive wear of the impeller and large clearance; Repair gaps;

(5) Poor ventilation, high indoor temperature, resulting in high inlet temperature; Opening ventilation openings to reduce room temperature;

(6) The running speed is too low, causing the belt to slip. Increase the speed to prevent the belt from slipping.

4. Insufficient traffic

(1) Inlet filtration blockage; Clean the dust and blockages from the filter;

(2) Impeller wear and excessive gap growth; Repair gaps;

(3) Belt slipping; Tighten the belt and increase the number of pieces;

(4) Large import pressure loss; Adjust the inlet pressure to reach the specified value;

(5) Ventilation leakage caused by pipelines. Inspect and repair pipelines.

5. Oil leakage or oil leakage into the casing

(1) The fuel tank is high and leaks out from the oil discharge port; Lower the oil level;

(2) Sealing wear causes oil leakage at the shaft end; Replace the seal;

(3) The pressure is higher than the specified value; Unclog the ventilation opening, install a 2mm diameter plug in the middle chamber, and open the plug under the wall panel;

6. Excessive current

(1) Low voltage; Suspend the operation of the fan and replace the high-power motor if necessary;

(2) Filter or pipeline blockage; Clear blockage;

(3) Changes in clearance inside the fan, with friction and collision; Analyze the causes of gap changes and eliminate them, repair them Friction parts;

(4) Excessive load; Check the cause of the load deviation and eliminate it, adjust it to the rated load;

(5) Motor malfunction; Repair the motor and replace it if necessary;

7. Abnormal vibration or sound

(1) Damaged bearings with excessive clearance; Replace bearings;

(2) Foreign objects entering the impeller hole disrupt balance, or foreign objects get stuck in the fan; Clear foreign objects and check for any damage to the fan caused by foreign objects;

(3) Overloading, overheating, etc. can cause friction and collision inside the fan; Eliminate the factors that cause abnormal working conditions and check for any component damage;

(4) Coupling misalignment; Adjust the coupling;

(5) Belt tension is too high or too low; Adjust the belt tension;

(6) Loose bolts at the connecting parts; Tighten the connecting bolts;

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