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Screw type air compressor fault detection and exclusion method
Author: www.dg-zhihe.com      Release Date:2012/11/2      View Count:7629
 
Screw type air compressor common faults:

  Screw type air compressor is the most common one of the air compressor, screw air compressor fault can affect the service life and the safety of the operator, so in production, understanding of screw air compressor fault is very important, can avoid some troubles in security and timely recover some unnecessary losses.

Unit 1current
Working voltage is lower than the rated voltage above 5%; power cable line too long or small diameter; loose wiring; unit set pressure exceeds the rated pressure of oil separation; clogging; contactor fault; fault host; main motor fault; unit fuel consumption or compressed air to a large quantity of oil
This failure occurs because there are: cooling too much oil, the correct position in the unit load observation, the level must be in the normal range; oil and gas separator damage; two return pipe plug; oil quality; precision filter not long-term replacement; high temperature also leads to work in air oil ratio exceed the standard.

2unit low pressure
The occurrence of this failure reasons: actual consumption is greater than the set output volume; screw air compressor air, air inlet valve failure ( load can not be closed ); transmission system is not normal; environment temperature; air filter clog; load solenoid valve (1SV ) fault; minimum pressure valve stuck; the user pipe network leakage; pressure sensor, pressure gauge, pressure switch is not working properly; screw wear fault causes the unit low pressure; pressure sensor or pressure to form the input hose leak;

3fan motor overload
Possible reasons: the leaf deformation; fan motor fan motor bearing fault; thermal relay fault ( aging); loose wiring; voltage is lower than the rated voltage.

Unit 4large oil consumption of compressed air or a large quantity of oil
This failure occurs because there are: cooling too much oil, the correct position in the unit load observation, the level must be in the normal range; oil and gas separator damage; two return pipe plug; oil quality; precision filter not long-term replacement; high temperature also leads to work in air oil ratio exceed the standard.

Unit 5high current when starting or tripping
User air switch; the input voltage is too low; star delta conversion interval time is too short ( for10~12 seconds ); hydraulic cylinder failure ( no reset ); air inlet valve failure ( opening is too large or stuck ); loose wiring; the main motor, host fails and causes the entire screw air compressor fault; bad (1TR time relay relay control unit ).

6screw compressor unit fault phenomenon: unable to start
Bad bad fuse; temperature switch; connection release; the main motor thermal relay thermal relay; fan motor; transformer bad; Intellisys no power input ( Intellisys control unit ); Intellisys controller failure.

7screw air compressor malfunction phenomenon: set high exhaust temperature (above 100° C )
Set coolant level is too low; the oil cooler is dirty, how to judge the cooler is dirty, mainly to see the oil inlet temperature and the outlet temperature and the temperature difference between the normal temperature difference, in20 -30 degrees, if the external dust plug radiators only the compressed air dryer static can, such as blowing off \ the inside of the radiator dirty is the need for professional cleaning agents to clean, such as radiator internal block of interest is the need for clean water pump circulation; cleaning, cleaning time depending on circumstances; as is water-cooled radiator plugging, the best way is to open the cover before and after the iron bars on the tube interior cleaning; oil filter clogging will lead screw type air compressor fault; electromagnetic valve without electrical coils or damaged or electromagnetic valve diaphragm rupture or aging; oil cut-off electromagnetic valve generally appear in the old type of cooling fan motor; fault; exhaust pipes are not smooth or exhaust resistance ( pressure ); environment temperature exceeds the scope of the provision (38° C and46 ° C ).

Unit 8the exhaust pressure too high
Inlet valve failure; the hydraulic cylinder malfunction; load solenoid valve (1SV ) fault; pressure setting too high pressure sensor fault; ( Intellisys control unit ); pressure meter fault ( relay control unit ); pressure switch ( relay control unit ).
The 9match and the air compressor water heater using, not tight can use screw air compressor waste heat without cost to obtain hot water, and used to improve the performance of screw air compressor, to avoid some common breakdowns.
 
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