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Rotary vane vacuum pump Troubleshooting

1. Rotary Vacuum Pump Fault Phenomenon: Low Vacuum Degree


Causes:


(1) insufficient oil;


(2) Pump oil is not clean and emulsified;


(3) The pump oil number is incorrect:


(4) The oil inlet hole is blocked and the oil supply is insufficient;


(5) Leakage; (6) Damage of exhaust valve piece;


(7) excessive fit clearance due to wear;


(8) With the increase of pump temperature, the oil viscosity decreases.


(9) The temperature of pump oil and gas body is too high:


(10) When assembling, the end cap bolts are not tightened uniformly, resulting in the axis deviation of the rotor.


(11) Fracture of blade spring:


(12) Blockage of intake pipe filter;


(13) The ballast valve is not closed or damaged;


(14) The key of the pump wheel is broken and the wheel rotates idly.


Exclusion methods:


(1) refueling;


(2) Open air ballast and replace new oil:


(3) oil change:


(4) Clean up the oil inlet hole and adjust the oil quantity;


(5) Check the seals, exhaust valves, end caps, etc., and replace the sealing rings;


(6) Replacing new valves; (7) Checking clearance and repairing;


(8) Increase the amount of cooling water;


(9) Air-cooled device;


(10) disassembly and reassembly;


(11) Replace the spring:


(12) Cleaning;


(13) Closing or repairing valves;


(14) Change keys.


2. Rotary Vacuum Pump Fault Phenomenon: Pump Blocking


Causes:


(1) The end clearance is too small and the pump oil temperature rises too high;


(2) impurities enter the pump;


(3) Pump temperature is too high;


(4) Rotor fracture;


(5) Rust in pump chamber.


Exclusion methods:


(1) Grinding the spindle and adjusting the clearance:


(2) cleaning up;


(3) Strengthen water cooling:


(4) Pump removal and replacement;


(5) rust removal.


3. Rotary Vacuum Pump Fault Phenomenon: High Noise


Causes:


(1) Fracture of blade spring;


(2) loose assembly parts;


(3) The parts are burred and deformed.


(4) No oil in motor shaft.


Exclusion methods:


(2) Change the spring;


(2) re loading;


(3) Reloading, grinding and replacement;


(4) Add lubricating oil.


4. Rotary Vacuum Pump Fault Phenomenon: Oil Leakage


Causes:


(1) Seals in axle holes, end caps, oil marks, oil releasing holes and oil tanks are damaged or not tightened;


(2) There are leaks in the tank.


Exclusion methods:


(1) Change the seal and tighten the screw:


(2) Close the leak.


5. Rotary Vacuum Pump Fault Phenomenon: Difficulty in Starting


Causes:


(1) low oil temperature;


(2) poor lubrication in the pump;


(3) There is no gas amplification in the pump chamber, and a large amount of oil enters the pump chamber.


Exclusion methods:


(1) Heating to above 15 degrees Celsius;


(2) adjusting oil quantity;


(3) Degassing during pump shutdown


6. Rotary Vacuum Pump Fault Phenomenon: Fuel Injection


Causes:


(1) The system suddenly exposed to the atmosphere;


(2) too much oil;


(3) The rotation direction of the rotor is reversed.


Exclusion methods:


(1) Turn off the low vacuum pump and continue to open the valve;


(2) Redundant oil released:


(3) Re-connect the power supply and commutate.


7. Rotary Vacuum Pump Fault Phenomenon: No Pump Pumping


Causes:


(1) The pump wheel key is broken and the rotor does not rotate;


(2) The rotor cross joint of the two-stage pump is broken and the high vacuum stage does not turn.


(3) The intake valve was not opened;


(4) The exhaust valve fragments.


Exclusion methods:


(1) New keys;


(2) replacement;


(3) Open the valve;


(4) replacement.

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Rotary Vacuum Pump

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