Common faults and treatment of air compressors in the process of CNC precision parts processing

In the process of CNC precision parts processing, if there is an abnormal phenomenon in the operation of the air compressor, the CNC lathe processing factory must immediately find out the cause of the fault, eliminate the fault immediately, and continue processing after the repair. predicted loss.

Fault phenomenon 1: The air compressor cannot be started

The possible causes are: blown fuse, failure of starting electrical appliances, poor contact of start button, poor circuit contact, low voltage, main motor failure, main engine failure (the main engine has abnormal sound and local heat), power supply phase loss, fan motor overload;

Elimination methods and countermeasures: After the CNC precision parts are processed, even arrange for electrical personnel to repair and replace them.

Fault phenomenon 2: The running current is high, and the air compressor automatically stops (the main motor overheats alarm)

Possible reasons are: voltage is too low, exhaust pressure is too high, oil and gas separator blockage, compressor host failure, circuit failure;

Elimination methods and countermeasures: ask electrical personnel to check, check/adjust pressure parameters, replace new parts, disassemble and inspect the machine body, and check the machining errors of CNC precision parts, and electrical personnel will check at the same time.

Fault phenomenon 3: The exhaust temperature is lower than the normal requirement

Possible reasons are: temperature control valve failure, no-load for too long, exhaust temperature sensor failure, intake failure, and the intake port is not fully opened;

Elimination methods and countermeasures: overhaul and clean or replace the valve core, increase the gas consumption or stop, check/replace, clean/replace.

Fault phenomenon 4: The exhaust temperature is too high, and the air compressor automatically stops (exhaust temperature is too high alarm)

The possible causes are: insufficient amount of lubricating oil, incorrect specification/model of lubricating oil, clogging of oil filter, clogging of oil cooler or serious surface dirt, failure of temperature sensor, out of control of temperature control valve, excessive dust collection of fan and cooler, The fan motor is not running;

Remedy and countermeasures: check and add oil, replace new oil as required, check and replace new parts, check and clean, replace new parts, remove and clean/blow, check the circuit and fan motor of CNC precision parts processing equipment.

Fault phenomenon 5: The oil content of the exhaust gas is large

The possible causes are: the oil and gas separator is damaged, the one-way oil return valve is blocked, and the precision-machined lubricating oil is excessive;

Elimination methods and countermeasures: replace new parts, clean the one-way valve, and release the cooling oil of some CNC precision parts processing equipment.

Fault phenomenon 6: The air compressor discharge volume is lower than the normal requirement

The possible causes are: blockage of air filter, blockage of oil and gas separator, air leakage of solenoid valve, leakage of air pipeline components, belt slipping/too loose, and intake valve cannot be fully opened;

Exclusion methods and countermeasures: blow out impurities or replace new parts, clean or replace new parts, check and repair,

Replace new parts/tension belts, clean, replace damaged parts.

Trouble phenomenon 7: Oil spit from the air filter after shutdown

The possible reasons are: failure of the check valve spring in the intake valve or damage to the check valve sealing ring;

Remedy and countermeasures: Ask the maintenance personnel of the precision parts processing factory to replace the damaged components.

Failure phenomenon 8: Safety valve action jet

The possible reasons are: the safety valve has been used for a long time, the spring is fatigued, the oil and gas separator is blocked, the pressure control fails, and the working pressure is high;

Elimination methods and countermeasures: replace or re-adjust, replace with new parts, check and re-adjust.