Interpret the advantages and disadvantages of oil-free screw air compressors

Interpret the advantages and disadvantages of oil-free screw air compressors

Oil-free air compressors are very popular. There is no doubt that oil-free air compressors do not contain any oil at all. The ones that are really oil-free are all oil-free air compressors. It is a real oil-free air compressor, and the general oil-free air compressor only contains very, very little oil.

Take a look at their differences in detail: the oil and non-oil in the air compressor generally refer to the oil content of the exhaust gas of the air compressor. Generally, the oil content of the oil-free machine is larger than that of the oil-free machine. It is 0.01ppm, so this oil content is used to distinguish the air compressor with oil and without oil. There is also a completely oil-free air compressor, which is not lubricated with oil, but with resin material lubrication, so the final gas discharged without oil is called a completely oil-free air compressor.

　　 Today we mainly look at the advantages and disadvantages of oil-free air compressors.

　　 Advantages of oil-free screw air compressor

1. The use of an oil-filled air compressor greatly wastes lubricating oil. Taking a 7.5KW high-quality oil-filled air compressor as an example, the minimum consumption of 5 kg of lubricating oil per month will cost 60 kg of lubricating oil in a year. At the same time, in order to remove the oil in the compressed gas, it is necessary to use a high-efficiency oil filter, which requires multiple replacement of the filter element, which is also a large cost.

　　2. Because of the high viscosity of lubricating oil, the oil removal equipment cannot completely remove it at present, so the oil-free characteristics of the gas compressed by the oil-free air compressor are irreplaceable.

3. The current dewatering equipment such as refrigerated dryers, non-heat regeneration dryers, and micro-heat regeneration dryers lose their dewatering function due to the oil in the compressed air; and the clean, oil-free gas compressed by an oil-free compressor , It fully protects the water removal equipment and reduces the extra capital occupation caused by the maintenance of the water removal equipment.

4. The use of an oil-free air compressor to provide compressed gas to the outside will not greatly reduce the load of the motor due to the pressure loss caused by the oil removal equipment, and achieve energy saving effects; the current good quality three-stage oil removal device will produce Pressure loss of 1 to 1.2 kg. A 7.5KW air compressor will pay an extra 600W of power loss for every 1 kg of pressure increase. Each working day (10 hours as an example) will pay 6 degrees of electricity. This will be a long-term Intangible expenses.

　　What are the disadvantages of oil-free screw air compressors

　　 1. The exhaust temperature of the main engine is very high

　　 Generally, the exhaust temperature of the main engine of an oil-free screw compressor can reach 180+. Generally, the factory will take some protective measures before leaving the factory, but you must pay special attention to high-temperature parts during operation to avoid burns or even fire risks.

　　2, the maintenance problem after the host is damaged

　　 At present, with the exception of a few manufacturers that provide oil-free maintenance, other manufacturers require direct replacement of the host, and the cost of replacing the host is very high.

　　3, the problem of the coating peeling off on the oil-free screw

Now oil-free screw compressors have two coatings, one is Teflon with general performance, and the other is molybdenum disulfide, which is much better. No matter which one of the above is, it has a long service life and is resistant to moisture. The requirements are higher. Therefore, when the oil-free screw machine is not in use, it is necessary to rotate the machine frequently to avoid the main machine from being stuck for a long time. The failure of the host computer to freeze often occurs because of such reasons.

In fact, each type of air compressor has its own advantages and disadvantages. When selecting, you should make a suitable choice according to your own needs. There is no absolute rule, only to recognize the advantages of each type of air compressor. The shortcomings are sufficient, and a sufficient understanding is conducive to the choice.