1. Oil-free dry screw air compressor is a twin screw air compressor. There is no lubrication in the compression chamber of the oil-free screw air compressor. There is lubricating oil only in the gearbox. said to be dry. The rotor surface is specially coated and the male and female rotors do not really come into contact. Since the dry screw without oil does not come into contact, the first compression pressure is not very high. To increase the pressure, two-stage compression is used. The best compression effect is isothermal compression. In fact, it is impossible to achieve isothermal compression, so there is an intercooler and trap (cooling, drainage) after the first compression stage, and there is also a rear cooler after the second stage. compression. The pressure of the first compression stage is approximately equal to the square root of 2, then this pressure enters the second compression stage. Due to the high speed and temperature inside the machine head, the machine head shell adopts unique lost foam technology for cooling. The head housing and rotor are completely separated. If air-cooled, the hull is oil-cooled; if water-cooled, the hull is water-cooled. Oil-free dry screw air compressors have high maintenance costs
2. Water-lubricated oil-free air compressors are generally single screw air compressors. Water lubricated oil-free air compressors are characterized by. used in compressors. The lubricating fluid is water, using water as a seal, completely oil-free, producing pure oil-free compressed air, completely changing the production environment of some industries. Since the water is sprayed intothe compression chamber, the temperature is only about 40-50 degrees, and the volumetric efficiency is higher due to constant temperature compression, which is 15% more efficient than dry screw air compressors without oil. Water-lubricated and oil-free screw air compressors have low maintenance costs and only require replacement of the water, water filter and air filter.
As a general-purpose machine, the compressor has good application prospects in many fields. Oil-free screw compressors have unique advantages. With the continuous deepening of research and continuous improvement of design technology, the performance of oil-free screw compressors will be further improved and their application areas will become more and more extensive. In some medical and other fields, oil-free piston models and other models are currently used.ses, and there may be a place for oil-free screw compressors in the future. In addition, it will also be used more widely and deeply in the chemical industry, aerospace, aviation and many other fields.
The differences between oil-filled air compressors and oil-free air compressors are: different materials, different final exhaust gases and different lifespans.
1. Different materials
1. Oil-containing air compressor: The material of oil-containing air compressor itself contains oily substances which will pollute the terminal equipment.
2. Oil-free air compressor: The material of the oil-free air compressor itself does not contain oily substances, which avoids pollution of terminal equipment by the oil-based air compressor.
2. The final gas discharged is different
1. Oil Filled Air Compressor: The CompressorOil-filled air uses oil lubrication, so the final gas discharged contains oil.
2. Oil-free air compressor: The oil-free air compressor is lubricated by resin material, so the final gas discharged does not contain oil.
3. Different lifespan
1. Oil-filled air compressor: The oil-filled air compressor does not have a heat-resistant piston, and the sealed grease is easily lost, resulting in the bearing must be damaged due to wear dry. The lifespan of oil air compressor is short.
2. Oil-free air compressor: The oil-free air compressor uses heat resistance.The piston prevents grease loss from bearings due to high temperature conduction and radiation, greatly extending the service life of the Totally oil-free air compressor.
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