What are the differences between oil-free air compressors and oil-based air compressors?
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Author : Runningway
Update time : 2019-11-29 11:10:47
What is the difference between oil-free air compressors and oil-based air compressors? What are the advantages of oil-free air compressors?
Today, oil-free air compressors are favored by many consumers. Among them, Ingersoll Rand oil-free air compressors have many unique features and benefits. Oil-containing is an oil-free air compressor. Air compressors that are lubricated with resin materials are truly oil-free air compressors. General oil-free air compressors have very little oil content.
So now let's focus on the two to see the major advantages of oil-free air compressors and their differences from oil-based air compressors.
Take a look at the difference between them: the presence of oil in an air compressor and the absence of oil generally refer to the amount of oil contained in the exhaust gas of the air compressor's exhaust port. It is 0.01ppm, so this oil content is used to distinguish between oil and no air compressor. There is also an all-oil-free air compressor. It is not oil-lubricated, but is resin-lubricated. Therefore, the final exhaust gas without oil is called an all-oil-free air compressor.
There is also an oil-free air compressor. It is not oil-lubricated, but is resin-lubricated. Therefore, the final exhaust gas without oil is called an oil-free air compressor. Not very satisfactory, domestic oil-free machines are generally oil-lubricated. The air in the air tank of an air compressor occupies a certain space, but it does not have a fixed shape and volume. When pressure is applied to the air in a closed container, the volume of the air is compressed, increasing the internal pressure. When the external force is withdrawn, the air will return to its original volume under the effect of the internal pressure.
In the past, this type of air compressor was damaged due to the easy loss of sealed grease and the bearings were dry. The quality is not very satisfactory. Generally, oil-free oil-lubricated machines are used in China. Improved oil-free air compressor on the basis of air compressor. This oil-free air compressor uses adiabatic pistons and adiabatic connecting rods, so that bearing grease is no longer lost by high temperature conduction and radiation, so that it is completely oil-free The life of the press has been greatly extended, and it has now completely surpassed the life of the oil-grade engines of the same grade. Generally, there is a large oil content in the oil machine, and the oil content of the oil-free machine is 0.01ppm, so this oil content is used to distinguish between the oil in the air compressor and the oil-free.
It is necessary to use a multi-stage separation filter device in the compressed air system or to pre-treat the compressed air into dry air with a certain relative humidity; oil content-high-speed and high-temperature air compressors are lubricated with lubricating oil. , Sealing and cooling, but polluted the compressed air. Although the oil-less, semi-oil-free, and oil-free machines developed with self-lubricating materials have reduced the oil content in compressed air, they have also reduced the life of consumable parts, rusted the interior of the machine and the piping system, and lost space. The side effect of the press is to increase the oil content during the running-in period, wear period and deloading period. This is undoubtedly a threat to automated production lines in pursuit of high reliability.
There is a movable object in the container. When the air returns to its original volume, the object will be pushed out by the pressure of the air in the container. This principle is widely used in production and life. Moisture-The relative humidity in the atmosphere is generally as high as 65% or more. After compression and condensation, it becomes wet saturated air and entrains a large amount of liquid water droplets. They are the root cause of the corrosion of equipment, pipes and valves, and they will block in winter due to freezing Small hole channel in a pneumatic system. It is worth noting that even if it is separated from pure pure saturated air, as the temperature decreases, there will still be condensate precipitation. For every 10 ° C decrease, its saturated moisture content will decrease by 50%, that is, half of the water vapor. Turn into liquid droplets.
Advantages of oil-free air compressor
1. At present, dehydration equipment such as refrigerated dryers, non-heated regeneration dryers, and micro-heated regeneration dryers lose the water removal function due to the oil in the compressed air; and clean oil-free gas after compression by the oil-free compressor , Fully protected the water removal equipment, reducing the additional capital occupation due to maintenance of water removal equipment.
2. The use of oil-based air compressors greatly wastes lubricant oil. Take a 7.5KW high-quality oil-based air compressor as an example. It consumes a of 5 kg of lubricating oil per month, and will pay an extra 60 kg of lubricants in one year At the same time, in order to remove the oil content in the compressed gas, it is necessary to use a high-efficiency oil filter, and the filter element needs to be replaced multiple times, which is also a great cost.
3. Due to the high viscosity of the lubricating oil, the current degreasing equipment cannot be completely removed, so the oil-free gas compressed by the oil-free air compressor appears irreplaceable.
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