2026-04-15Views：
Technical Analysis of Oil-free Screw Air Compressor
oil-free screw air compressor is a kind of equipment which adopts oil-free lubrication technology and realizes air compression through the meshing movement of screw and star wheel. Its core is to replace traditional lubricating oil through physical structure design and water lubrication system to ensure the purity of compressed air and realize efficient and stable operation. The following is a professional analysis from the three dimensions of technical principles, performance advantages and application scenarios:
compressor structure
the equipment adopts a symmetrical meshing structure of single screw and double star wheel. As an active part, the screw drives the star wheel to move along the track through rotation to form a continuous closed working cavity. As the screw rotates, the volume of the working chamber gradually decreases, completing the air compression process.
oil-free lubrication system
water is used as lubrication, cooling and sealing medium to replace traditional lubricating oil. The water circulation system forms a water film on the surface of the screw, star wheel and bearing by precisely controlling the water flow and pressure to achieve the following functions:
gas purification mechanism
during the compression process, the air is completely isolated from the water medium to avoid oil pollution. The exhaust end is equipped with a high-efficiency gas-water separator to ensure that the water content of the compressed air is less than 0.001 g/m & sup3 through centrifugal separation and filter element filtration, which meets the oil-free standard.
air purity guarantee
the oil-free design makes the compressed air have zero oil content, which meets the needs of industries with strict air quality requirements such as food processing and pharmaceutical manufacturing. For example, in the production of pharmaceuticals, contamination of the active ingredient with oil can be avoided.
Energy Efficiency and Stability
Maintenance convenience
at present, oil-free screw air compressors are developing in the following directions:
Oil-free screw air compressor with its oil-free, efficient and stable technical characteristics, has become an ideal choice for compressed air supply in modern industry. Enterprises in the selection, should be combined with gas quality requirements, energy efficiency objectives and maintenance costs, after a comprehensive assessment to make a decision.
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有油、微油、无油空压机在含油量上存在显著差异，具体如下： 有油空压机： 含油量较大：有油空压机在压缩过程中会向螺杆腔注入润滑油，这些润滑油会混入压缩空气中，导致排气口排出的
Oil-free air compressors have a wide and critical role in high-end manufacturing, food and medical fields. The following is a general description of the application of oil-free air compressors, and then the specific work of water-lubricated oil-free air compressors of Shanghai Granklin Group in these fields.
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