The air filter is a consumable in the screw compressor, which will be blocked and damaged accidentally when used。The air filter of the screw air compressor is composed of an air filter assembly and a filter element, which is externally connected with the air intake valve of the air compressor through a joint and a threaded pipe to filter dust, particles and other foreign objects entering the air。In general, the installed air filter can be selected according to the size of the intake volume。

Fault performance: Filter blockage will consume the energy of the air compressor, waste electricity, and make dust easily enter the unit through the filter element。Too much dust inside the air compressor will affect the service life of the screw air compressor oil, resulting in oil and gas separation blockage。

Troubleshooting: 1, the filter element is the core component of the filter, made of special materials, is vulnerable parts, need regular maintenance。

2, the longer the use of the filter, the more impurities cut off, the greater the pressure, the less flow, the need for immediate cleaning。

3. When cleaning, be careful not to deform or damage the filter element。

The filter paper in the equipment is also one of the heavy, high-quality filter paper is usually filled with synthetic resin fine fiber paper, can effectively filter impurities, pollution capacity is strong。The equipment also has strict requirements for the strength of filter paper。Due to the large air flow, the strength of the filter paper can resist strong airflow, ensure filtration efficiency and extend the service life of the equipment。The fine porosity of the filter paper is about 10um, and the dust on the surface is usually removed every 1000 hours, and the method of removal is to blow the dust away from the inside out with low pressure air。The screw air compressor air filter is installed with a differential pressure controller, and there will be an early warning when there is blockage, then it is necessary to clean or replace the air filter

Oil injection screw air compressor is widely used in all walks of life because of its advantages of small vibration, low noise, high efficiency, less wearing parts, convenient maintenance and management。

However, if the management is neglected and the operation of the air compressor is not accurately judged, a large number of problems may occur in the screw air compressor, leading to the abnormal operation and use of the air compressor。Common faults are as follows:

Excessive exhaust temperatureUnder normal circumstances, the exhaust temperature of the oil injection screw air compressor should be between 75 and 95 ° C, if the exhaust temperature is too low and lower than the pressure dew point, it will make more water in the system and cause the air compressor oil emulsification, affecting the lubrication effect and even leading to damage to the main engine。

The exhaust temperature is too high is not allowed, if the exhaust temperature is too high, it will cause damage to many components of the equipment, if the situation is serious, and even burn the host。Therefore, screw air compressors are equipped with high temperature protection, and will automatically stop when the exhaust temperature exceeds 100 ° C。

The reasons for the high exhaust temperature are mostly related to the abnormal air compressor oil, cooling system and sensor, such as the air compressor oil of the system becomes less or deteriorated, the heat transfer effect of the cooler is poor, and the sensor is abnormal, which will lead to the high exhaust temperature of the air compressor。

2.Air compressor oil consumption increases

The increase in fuel consumption of air compressors will invisibly increase the management and maintenance cost of air compressors, so attention should also be paid to the reasons for the increase in fuel consumption are mainly as follows:

High oil level

If the oil of the air compressor is too much, it will lead to the oil and gas discharged from the air compressor head can not be completely separated, and some air compressor oil will flow out with the gas, resulting in increased fuel consumption。Therefore, you should pay attention to observe, avoid adding too much air compressor oil in too long maintenance, as long as it is maintained within a reasonable range。

Oil-gas separator fault

If the oil and gas separator fails or fails。Oil and gas can not be fully separated, resulting in air compressor exhaust to take away part of the air compressor oil, increasing fuel consumption。Therefore, we should often observe the pressure difference of the oil and gas separator, and replace it in time if there is a problem。

Return line failure

The function of the return pipe is to return the air compressor oil deposited at the bottom of the oil and gas separator to the head of the air compressor, if clogged, it will also cause this part of the air compressor oil to be discharged and increase fuel consumption。

The oil shutoff valve is faulty

The oil cut-off valve is located between the head of the main engine and the oil and gas separation cylinder. If the fault occurs, the air compressor oil in the oil and gas separation cylinder can not be closed in time when the air compressor is shut down, and the air compressor oil will be poured back to the main engine, and then ejected from the suction filter, and the air compressor oil will leak out in large quantities。Therefore, when the air compressor is shut down, pay attention to the filter at the suction port, and if it is abnormal, it should be repaired in time。

In addition, it is also necessary to pay attention to the leakage of the pipeline in order to find and solve it in time。

3.Air compressor oil quality deteriorates

The oil quality of air compressor oil has a direct impact on the operating status of screw air compressor, so there should be enough attention, the reason for the deterioration of oil quality may be because the operating environment of air compressor is relatively poor, more dust, and the air compressor accelerates the deterioration of air compressor oil after inhalation。On the other hand, if the operating temperature of the air compressor is too high, it will also accelerate the oxidation and deterioration of the oil, and if the operating temperature is low, it is easy to cause the emulsification of the air compressor oil。Therefore, for the suction of the air compressor, it should be placed in a clean place as far as possible, and for the air compressor oil, it should be replaced regularly and can not be mixed with different brands of oil。

4.Cooling system failure

The cooler can be divided into air-cooled models and water-cooled models。

The wind-cooled type relies on an axial fan to blow the cooling fins of the cooler. If the cooling fins are dirty and blocked, the cold air blown by the axial fan will not pass smoothly, and the expected cooling effect can not be achieved, causing high temperature。In addition, if the external ambient temperature is too high, more than 40 degrees, the heat dissipation effect is also very poor。

The water-cooled type is generally due to poor water quality, causing the scale of the cooler, thus making the heat transfer effect worse。If conditions permit, you can add a softening agent to the cooling water, or use a pure water system and other methods to prevent the occurrence of scaling in the cooling water。In addition, if the inlet temperature of the cooling water is too high, it will also affect the heat transfer effect。

In short, as long as we usually strengthen the observation and management of air compressor and carry out maintenance on time, we can ensure the normal operation of air compressor function and provide a strong guarantee for the production of enterprises。