Common Fault Treatment of Air Compressor

Air compressor fault and treatment method

high outlet temperature or exhaust temperature of air compressor head

excessive temperature rise is a common fault in the operation of screw air compressors. Screw air compressors often run at high temperatures, which will seriously affect the displacement and service life of the machine. When the temperature rises too high, a high temperature shutdown failure will occur. The reasons are:

1. Temperature sensor fault. Temperature sensor failure, will cause the PLC false alarm temperature is too high, causing shutdown.

2. Environmental temperature factors. The head outlet temperature of the screw air compressor is generally set at about 110 ℃, while the outlet temperature of the head is equal to the ambient temperature plus 60 ℃. The ventilation environment under the pit is poor, and most of the high temperature is caused by this.

3. Temperature control valve failure. When the compressor is cold-started, the temperature control valve can make the oil bypass the cooler and directly spray into the main engine head to accelerate the rise of oil temperature and prevent condensation in the compressor. After the compressor is running normally, it can adjust the flow through the cooler according to the oil temperature. The proportion of oil volume on the side of the road controls the oil injection temperature. If the temperature control valve is damaged or the action is not sensitive, a large amount of high temperature oil will not pass the cooler directly into the host head, resulting in high host temperature.

4. Oil filter failure. The oil filter is used to filter the dust and impurities in the oil circuit. It is easy to be blocked after a period of time. After being blocked, the oil return is not smooth and the temperature of the host is high. (often appears at the moment of loading)

5. Fault of oil cut-off valve. The fuel cut-off valve controls its reciprocating fuel injection through the air pressure of the gas storage tank. If a fault occurs, the oil circuit is not smooth, causing the oil temperature to be high; debris blocks the oil circuit or controls the gas circuit, causing the fuel cut-off valve to close and not spray oil, which will also cause The main engine head has high temperature due to lack of oil or poor heat dissipation.

6. Insufficient amount of lubricating oil, dirty oil cooler, blockage, will cause the temperature is too high.

7. The cooling fan fails, the air cooler is blocked, and the exhaust resistance is too large, resulting in poor heat dissipation and high temperature. The external dust and internal oil of the cooler shall be cleaned.

8. The unloading pressure setting is too low, which leads to the excessive oil resistance of the air compressor during the unloading cycle, and the slow flow rate leads to the heat not being dissipated in time, thus causing the failure of high temperature shutdown. Therefore, the unloading pressure should be set reasonably.