Air compressor maintenance method

Air compressors are widely used. As users, how can we better maintain air compressors?

Before starting the 1., open the side cover to observe whether the oil has thickened or frozen. If so, heat the oil first, then open all the exhaust gates on the air compressor. After turning the large flywheel for 2-3 turns, start the machine with no load. Take the oil pressure gauge unit and carefully observe whether the pressure on the pressure gauge rises to the normal value (I .e. 0.3-0.4mpa) to hear whether there is abnormal noise or abnormal gas generation. Everything is normal, after running for 15 minutes with no load, close the valve and check whether each control circuit is normal, that is, whether the pressure regulating valve takes off according to the regulations and whether the secondary pressure of the 1. is normal. After everything is normal, the air compressor enters the normal gas supply state. (The reason is that it works as soon as the machine is started, and the lubrication is not good, which can easily cause the phenomenon of drawing and cylinder pulling, and finally cause the machine to explode).

2. should replace the corresponding required compressor oil in time with the change of temperature. 13#(the new standard is 100# compressor oil) should be used in winter. 40CD winter oil is recommended for air compressor diesel engines above 9/7. In some areas, the temperature is extremely low, and special oil with freezing point lower than the local temperature should be replaced.

After the 3. is shut down in winter, attention must be paid to venting all gas, blowdown and drainage, and venting water, gas and oil in various pipelines and gas bags. As the temperature of the unit is relatively high when it is working in winter, a large amount of condensed water will be generated after air cooling due to low external temperature after shutdown. There are hidden dangers in various control pipelines, intercoolers and gas bags, such as blockage of control pipelines and intercoolers and gas bags.

4. electric air compressor, because the oil viscosity of each lubricating part of the unit is relatively high when starting up in winter, and the voltage on some mines is relatively low, it is easy to make it relatively difficult to start up when starting up. Generally, the method is adopted to turn the unit 2-3 times, inching the air compressor 3-4 times, remove or unload an exhaust valve from the connecting steel rod between the air compressor and the air drum, and let the unit run for 10 minutes after starting up, then install the removed parts and restart, generally can let the unit run normally. In addition, after the electric air compressor is turned on every day and allowed to work normally, a multimeter can be used to measure the current situation during operation. Generally, the normal situation is within 5% of the rated current of the motor. If the current exceeds 10% of the normal current, the unit has problems or the voltage is low, and should be shut down for inspection, otherwise the motor is easy to heat up and burn out.

5. diesel air compressor must empty the water in the diesel engine and water tank after shutdown, especially the water logging under the water tank and the water logging at the water inlet of the diesel engine, the water logging under the cylinder of the water-cooled air compressor and the water logging at the inlet and outlet of the intercooler. Every winter there are users because there is no timely drainage, resulting in the cylinder frost cracking phenomenon. Start using the diesel engine in the morning, and it is best to add hot water to the water tank so that the diesel engine is easy to start.

Compressor System Equipment Maintenance Section II:

1. Daily maintenance contents: check the air filter element and coolant level;

check the hose and all pipe joints for leakage; check the records, if the consumable parts have reached the replacement cycle, they must be shut down and replaced;

check the records, when the exhaust temperature of the main engine reaches or approaches 98 ℃, the oil cooler must be cleaned; check the records, if it is found that the pressure difference of the separator reaches above 0.6BAR (limit 1BAR) or the pressure difference starts to decrease, stop the machine and replace the separation core; check the condensate discharge. If it is found that the discharge is too small or there is no condensate discharge, stop the machine to clean the water separator.

2. Monthly maintenance contents: Check the surface of the oil cooler and clean it if necessary; · Clean the aftercooler; · Clean the water separator; · Check the connection of all wires and tighten them; · Check the AC contactor contact; · Clean the dust on the surface of the motor suction port and the surface of the housing; · Clean the oil return filter.

3. Quarterly maintenance content: · Add grease to the main motor; · Clean the main motor and fan motor; · Replace the coolant; · Replace the oil filter element; · Clean the oil cooler; · Check the minimum pressure valve; · Check the sensor.

4. Annual maintenance content: · Replace coolant (UltraCoolant);· Check check valve; · Check cooling fan; · Check hydraulic cylinder or stepping motor and stepping limit device; · Safety valve calibration (sent to the labor bureau designated unit for mandatory inspection).

5. Precautions: For the maintenance details of the air compressor, please read the random instruction manual carefully.

Air compressor maintenance Section III:

in order to ensure the normal operation of the compressor to extend the service life in addition to regular maintenance, daily maintenance inspection is very important.

In addition to using various instruments to measure the operation of the compressor, it is usually checked by watching, listening and touching. However, these three methods are not isolated, but interrelated, and one of them alone cannot check the operation of the compressor.

Look-by looking at the method, you can see whether the parts of each transmission part are loose, whether the lubrication of each friction part is good; whether the cooling efficiency of the cooling water and intercooler of the cylinders at all levels is good and whether the flow of cooling water is smooth; Whether the cylinders and coolers at all levels are deflated; whether there is air leakage and oil leakage at each connection;

listen-with the method of listening, can correctly judge the operation of the compressor. Because when the compressor is running, its sound should be uniform and rhythmic. If its sound loses its rhythm and there is uneven noise and noise, it means that the internal parts of the compressor or the working condition of the cylinder have changed abnormally.

Touch-the degree of fever can be known by touching. But we must pay attention to safety, it is best to stop and check. More attention should be paid to safety when checking the friction parts of moving parts (all levels of gas hiding outlets must not be touched because the temperature here is higher). At the same time, we can also know the vibration of the transmission parts. However, the three methods of seeing, listening and touching are not isolated, and sometimes it is impossible to judge the working condition of the equipment by only one method. Therefore, we must also analyze some of the observed materials in order to draw correct conclusions.

For example: the inlet leakage of the cylinder can be touched, because after the inlet leakage, the temperature of the cylinder head will increase due to the leaked high-temperature gas, but when the inlet leakage is not too large, It may not be possible to touch it. This requires the method of listening to hear it, or the method of looking at it from the pressure gauge.

Because after the gas leakage, the intake pressure of this stage of the cylinder increases and its outlet pressure decreases.