TWO-STAGE MEDIUM-PRESSURE SCREW-TYPE AIR COMPRESSOR SET

摘要

A two-stage medium-pressure screw-type air compressor set comprises a first-stage screw compressor (21) and a second-stage screw compressor (22) which is communicated with a gas-liquid separator (6) via a gas-liquid tangential inlet tube (61). The middle part of the gas-liquid separator is provided with an oil outlet tube (63); oil liquid from the oil outlet tube (63) passes through an oil-liquid filter (64) and lubricating oil is injected to the lubricating parts of the compressors. The oil outlet part of the gas-liquid separator (6) is also provided with a secondary separator (9), which comprises an upper separating barrel (91) and a lower separating barrel (92).The upper part of the upper separating barrel (91) is provided with a secondary oil inlet (94) connected with the oil outlet tube (63) and the lower part thereof is provided with a secondary oil outlet (98) connected with the lubricating parts of the compressors. An electric ball valve (95) is arranged between the upper separating barrel (91) and the lower separating barrel (92), and the lower part of the lower separating barrel (92) is provided with a secondary drain electromagnetic valve (99). The two-stage medium-pressure screw-type air compressor set can efficiently reduce the level of moisture and impurities in the lubricating oil, and thus provides stable pressure discharge, high operational efficiency, reliability and safety, low-noise levels and long service life.