How do oil-free screw compressors achieve cooling and sealing?
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The lubricating oil in screw compressors serves simultaneously to lubricate, cool, and seal. Although oil-free screw compressors do not require lubrication, they still need cooling and internal sealing. I would like to ask how oil-free machines prevent internal gas leakage and how cooling is achieved
Generally, the housing of oil-free screw compressors is equipped with a jacket for water cooling or air cooling. The screws in these compressors are kept synchronized through external synchronous gears, and the clearance between them meets the design requirements. Internal leakage does occur, which is why the volumetric efficiency of oil-free compressors is generally lower than that of oil-based ones