Analysis of the advantages and disadvantages of oil-free screw air compressor

Analysis of the advantages and disadvantages of oil-free screw air compressor

The oil-free air compressor is composed of screw head, electric motor, oil and gas separation barrel, cooling system, air conditioning system, lubrication system, safety valve and control system. The whole machine is installed in a box, which is self-contained and can be directly placed on a flat concrete floor, without anchor bolts on the foundation. Now the twin-screw air compressor network will separately describe the advantages and disadvantages of oil-free screw air compressors.

　　 Advantages of oil-free screw air compressor:

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

2. At present, the 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 and oil-free gas compressed by an oil-free compressor , It fully protects the water removal equipment and reduces the additional capital occupation caused by the maintenance of the water removal equipment.

3. 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 during use For a 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, and will pay 6 degrees of electricity for each working day (10 hours as an example), which will be a sum of money Long-term intangible expenses.

4.Using 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 kilograms of lubricating oil per month will cost an extra 60 kilograms of lubricating oil in one 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.

　　 Disadvantages of oil-free screw air compressor:

　　1. The problem of coating peeling 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.

　　 2. 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.

　　 3. Repair problems 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.

　　 The advantages and disadvantages of oil-free screw air compressors were summarized above, and I hope to be helpful when you choose oil-free screw air compressors.