1. Fault phenomenon of screw air compressor: high fuel consumption of the unit or high oil content in the compressed air.
Screw air compressor is a common type of air compressor, and the failure of screw air compressor can affect its service life and the personal safety of operators. Therefore, in industrial production, understanding the failure of screw air compressor is very important.
1. Fault phenomenon of screw air compressor: high fuel consumption of the unit or high oil content in the compressed air.
The reason for this malfunction is that there is too much cooling oil, and the correct position should be observed when the unit is loaded. At this time, the oil level should be within the normal range of the scale; The oil and gas separator is damaged; Secondary oil return pipe blockage; Oil quality issues; The precision filter element has not been replaced for a long time; Excessive oil temperature can also lead to excessive oil content in the working air.
2. Fault phenomenon of screw air compressor: low unit pressure
The reasons for this malfunction are: the actual gas consumption is greater than the output gas volume of the unit; Screw air compressor vent and intake valve malfunction (unable to close during loading); The transmission system is abnormal; The ambient temperature is too high; Air filter blockage; Fault in load solenoid valve (1SV); The minimum pressure valve is stuck; There is a leak in the user's pipeline network; Pressure sensors, pressure gauges, pressure switches, etc. are not working properly; Screw wear failure can lead to low unit pressure; Pressure sensor or pressure gauge input hose leaks air;
3. Fault phenomenon of screw air compressor: The motor of Cooling fan is overload.
Possible reasons include: deformation of the blade fan; Fan motor bearing failure; Fan motor thermal relay malfunction (aging); Loose wiring; The voltage is lower than the rated voltage.
4. Fault phenomenon of screw air compressor: high unit current.
The working voltage is more than 5% lower than the rated voltage; The power supply cable is too long or the wire diameter is too small; Loose wiring; The set pressure of the unit exceeds the rated pressure; Oil separation core blockage; Contactor malfunction; Host malfunction; Main motor malfunction;
3. Compressed air quality
According to the requirements of gas equipment for compressors in the industry, screw air compressors and supporting equipment should be selected appropriately. The following points need to be considered:
1) To reduce the oil content in compressed gas, a degreasing purifier can be used. If the treatment index is high, multi-stage treatment can be selected.
2) Reducing the water content in compressed gas can be achieved through the use of water removal equipment.