Why screw air compressor can gradually replace piston machine

Why screw air compressor can gradually replace piston machine

Screw air compressors and piston air compressors can be said to be the two models with the highest share of the current air compressor market. In the past, piston type air compressors were basically used. In recent years, with the characteristics of screw type air compressors, piston type air compressors have gradually replaced and become the mainstream in the air compressor market. So what are the advantages and disadvantages of piston air compressors and screw air compressors?

　　 Piston-type air compressors have certain defects. Both piston rings and packing devices do not need to be lubricated. Under normal circumstances, the compressed gas is basically pure and does not contain oil, but because the oil scraper ring is often incompletely scraped, the seal is not good, and oil often runs to the packing device or even the piston ring, so that the discharged compressed air contains oil. .

　　 In addition, the exhaust temperature of the piston air compressor is high, sometimes even as high as 200 ℃; the cooler is blocked, so that the cooling effect is not good. Piston rings are easily worn out if they are stained with oil, such as air leakage in valve flaps and wear of cylinder liners.

The screw air compressor has the unparalleled advantages of the piston air compressor: 1) stable operating pressure and exhaust pressure; 2) low motor power and high working efficiency; 3) low vibration and low noise; 4) parts Less, accessories are not easy to damage, long service life. This is due to the simplification of the complex mechanical mechanism and optimization of the structural performance, so that it can give full play to the performance of the unit.

　　In the daily operation process, as long as the oil and gas separator, air filter, oil filter and lubricating oil are changed regularly