Comparison of direct drive and belt drive of air compressor

Comparison of direct drive and belt drive of air compressor

The two transmission modes of air compressors are direct gear transmission and transmission through a certain medium, namely belt transmission, generally speaking, direct drive and belt transmission. Differences and comparisons are made in terms of operating transmission efficiency, no-load energy consumption, and oil loss. The first choice is to compare the operating transmission efficiency. An excellent gear transmission efficiency can reach 98%-99%, and an excellent belt transmission design can reach 99% efficiency under normal working conditions. The difference between the two does not depend on the choice of transmission mode, but depends on the manufacturer's design and manufacturing level.

　　 Secondly, in terms of no-load energy consumption, for direct gear transmission, the no-load pressure is generally maintained above 2.5 bar, and some screw air compressor equipment is even as high as 4 bar to ensure the lubrication of the gearbox. For the belt drive mode, theoretically speaking, the no-load pressure can be zero, because the oil sucked in by the rotor is sufficient to lubricate the rotor and bearings.

　　 Generally, for safety reasons, the pressure should be maintained at around 0.5 bar. The last is the oil loss. The gearbox is the first to suffer from the loss of oil, and the belt drive system does not have this safety problem. Through the comparison of three aspects, the direct drive mode and the belt drive mode have their own advantages and disadvantages. Which equipment to choose depends on the actual working conditions.