Compression Performance Study of Oil-less Helical Compressor

Helical compression mechanism is the newly developed one that can compress gas by using helical components. As helical shape has uneven pitch, the volume of each chamber becomes smaller along the rotation, and the gas is transferred and compressed continuously. This mechanism was designed in 1987, and the compressors with lubricant were developed and manufactured for refrigerators first in the world in 2000. And oil-less air compressors using helical mechanism were also developed and manufactured in 2003. This oil-less helical compressor doesn't contain oil at all. To achieve high performance and reliability in oil-less compressor, gas sealing, wear durability, and cooling are usually major problems, because contribution of oil to these functions can not be expected. This study focuses on the performance related to these problems, and investigates flow performance at variable motor speed, and compression process of oil-less helical compressor by measuring P-V diagram.