Screw air compressor how to achieve the effect of gas without oil

Screw air compressor to achieve gas-free effect, the key is to use water lubrication technology replace the traditional lubricating oil, from the source to prevent oil into the compressed air. The following is the specific implementation and the core principle of water lubricated air compressor:

1. "Oil" Problem of Traditional Screw Air Compressor

traditional screw air compressor through lubricating oil to achieve the following functions:

  1. cooling: Reduce the high temperature generated during compression.
  2. Seal: Fill the gap between the rotor and the casing to prevent gas leakage.
  3. Lubrication: Reduce the friction of rotors, bearings and other parts.
    However, lubricating oil will enter the follow-up system with compressed air, resulting in oil pollution, which is strictly prohibited in medical, food, electronics and other industries.

"Oil-free" Realization Principle of 2. Water Lubricated Screw Air Compressor

water lubricated screw air compressor through water instead of lubricating oil, Complete the three functions of cooling, sealing and lubrication, as follows:

  1. cooling: water directly absorbs heat
    water has a high specific heat capacity and absorbs heat directly during compression without relying on lubricating oil. The compressed high-temperature water is cooled by an external cooling system (such as a cooling tower or a heat exchanger) and then recycled to ensure that the temperature of the compression process is controllable.

  2. Seal: water film isolation gas
    A uniform water film is formed on the surface of the rotor to fill the gap and prevent the leakage of compressed gas. Water has a low viscosity, but through precise rotor design (such as screw profile optimization), it can still achieve efficient sealing without residue or deterioration like oil.

  3. Lubrication: water reduces friction
    water forms a lubricating layer on the surface of the rotor, reducing the friction of direct metal contact. Although the lubricity of water is not as good as oil, by optimizing the rotor material (such as high wear-resistant alloy) and surface treatment process, long-term stable operation can be ensured without worrying about oil contamination.

3. key design to ensure oil-free effect

  1. independent waterway system
    the water-lubricated air compressor is equipped with an independent water circulation system, which is completely isolated from the compressed air. The water is recycled in a closed loop, and only a small amount of water lost by evaporation needs to be replenished periodically to avoid the entry of external impurities.

  2. efficient gas-water separation
    the compressed air will carry a trace of water vapor, which needs to be completely removed by a dryer (such as a refrigerated dryer and a suction dry dryer) to ensure that the air is dry and oil-free.

  3. Corrosion resistance of materials
    the parts in contact with water (such as rotor, casing and pipeline) shall be made of corrosion-resistant materials (such as stainless steel) to prevent rust or impurities from affecting air quality after long-term use.

Verification and Maintenance of Oil-free Effect of 4.

  1. real-time monitoring
    the oil content in the gas is continuously monitored by the oil detector to ensure that it is always below the industry standard (e. g. the medical industry requires oil content <0.01 mg/m & sup3;).

  2. Regular maintenance

    • replace the air-water separation filter element to prevent blockage and moisture residue.
    • Clean the waterway system to avoid the accumulation of scale or impurities.
    • Check rotor wear to ensure sealing and lubrication.

Advantages of 5. water lubricated air compressor

  1. zero risk of oil pollution completely avoid the pollution of compressed air by lubricating oil, and meet the strict requirements of medical, food and other industries.
  2. Environmental protection and energy saving: No need to treat waste oil, and the cooling efficiency of water is higher than that of oil, which can reduce energy consumption.
  3. Quiet operation: Water lubrication reduces mechanical friction noise and runs more smoothly.

Through the above design, the water-lubricated screw air compressor realizes the real "gas-free oil", and provides a reliable solution for the industry with extremely high air quality requirements.

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