Air Compressor maintenance methods and common faults

Considerations for Maintaining Compressed Air Supply Systems

①The air inlet of the compressor must be equipped with a dust filter. The filter element of the dust filter is made of microporous material or felt material with strong adsorption capacity. Commonly used felt filter materials include acrylic fiber, polyester fiber filter cotton, glass fiber, jelly palm, activated carbon, honeycomb paper materials, etc., which can ensure that small dust particles and abrasive debris in the air will not enter the compressor cylinder, thereby preventing Excessive wear of cylinder walls, piston rings and pistons. It can also be used in combination with the dust filter and the muffler, which not only reduces the pollutants in the air, but also eliminates the noise at the air inlet. In addition to the felt filter, sieve filter and Oil Bath filter can also be used. device. In order to improve the filtration efficiency of the sieve filter, the filter screen should be soaked in oil to make the screen have a certain viscosity, and dust and other particles will be stuck when passing through the filter screen. The Oil Bath filter is to let the air pass through the oil or pass through the oil surface to filter out the dust. In order to maintain the efficiency of the filter, the filter should be cleaned and replaced frequently.

②The volume of the air storage container used in conjunction with the Air Compressor should be appropriate. If the volume is too small, the compressor will start frequently; if it is too large, it will take up a lot of space unnecessarily, and the compressor will have to work for a long time to make it reach the required pressure.

③ The distribution system is the key to the connection of the compressed air system. The distribution system includes hoses or fixed pipes of appropriate specifications, joints, valves, air filters, oil-water separators, air pressure regulators, instrument lubricators and other air control devices. It is necessary to check carefully on a regular basis to make their performance meet the specified requirements. The pipes and accessories connecting the compressor and the gas storage container must withstand pressure. For gas pipelines that do not need to be moved, it is generally better to use copper pipes or galvanized iron pipes. If the compressor needs to be lubricated with oil, the air hose used must not only be pressure-resistant, but also oil-resistant.

Common faults and treatment methods of compressors

① Low gas production If it is found that the pressure generated by the compressor is always low and meets the work needs, it may be caused by a large gas consumption and low output. At this time, consider adding a compressor or replacing a compressor with a larger gas production capacity. .

② Suction valve failure The simple way to check whether the suction valve is faulty is to remove the inlet and the filter, and then hold the palm of your hand against the suction inlet. If the hand is tightly sucked to the suction inlet, it means that the suction valve is working normally. , if it is pushed back instead of being sucked tightly, or if you feel that the suction force on your hand is changing, it means that the suction valve is not closed properly. Due to the air leakage of the suction valve, the air does not enter the pressure vessel through the discharge valve, but through the suction valve. It is discharged again, so the gas production efficiency is low. Since the gas production efficiency will be reduced as long as there is a slight leakage of the suction valve, the failure of the suction valve should be repaired in time.

③The inner diameter of the gas pipeline is too small. If the inner diameter of the gas pipeline is not large enough, the pressure drop during the gas transmission process will be as small as possible. Try to use a pipeline with a larger inner diameter. Generally, the minimum inner diameter of the main air pipe should not be smaller than that of the compressor exhaust. The inner diameter of the air port, the length of the pipe and the inner diameter of the pipe match the power of the motor. The recommended pipe specifications are shown in Table 4-9. When setting a long main line, in order to make the air supply smooth, a certain slope should be maintained throughout the entire process. , Drainage devices are installed at all low points of the pipeline to drain the condensed water in time to prevent it from hindering the delivery of compressed air.

In the case that the pipeline cannot be replaced, in order to solve the problem of insufficient gas supply, another compressor can be added, or the gas supply system can be made into a closed-circuit circulation form and an additional gas storage container can be added, which is beneficial to the pressure of the pipeline. control.

④Air leakage Air leakage occurs in the air distribution system, which will not only cause unnecessary waste, but also cause insufficient air supply. Due to seasonal temperature changes and other reasons, air leakage will occur at joints and pipe connections in the pipeline during the mutual conversion of cold and heat. In addition, the use of quick-loading and detachable pipe joints, pressure relief valves, and drain valves are worn, which also causes leakage. s reason. The simple way to check the gas distribution system is to use a brush dipped in soapy water and apply it to all connection points to see if there are bubbles. The economical way to solve the leakage is to maintain the pipeline regularly and replace the leaking valves and connections in time pieces.

See Table 4-10 for the impact on the spraying quality due to the defects of the compressed air system and the corrective methods.

It is generally safer to operate the Air Compressor system, but there may be unsafe hazards if you do not pay enough attention. Things to pay attention to include: when performing maintenance on the equipment, you need to cut off the power supply and unplug the power plug; do not touch the working parts with your hands, because of high-speed operation The parts of the compressor will hurt the human body and the temperature of the compressor is extremely high when it is working. Be careful not to touch the skin to avoid burns; be careful when releasing the high-pressure gas, and the action should not be too violent, and prevent the high-speed airflow from blowing dust and foreign objects to hurt people.