What is oil-free screw air compressor

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:

principles of 1. Technology

1. 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.

2. 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:

   • lubrication: Reduce friction of moving parts and reduce wear rate.
   • Cooling: Absorb the heat generated during compression and control the exhaust temperature.
   • Seal: Fill the meshing gap and improve the compression efficiency.

3. 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.

2. performance advantages

1. 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.

2. Energy Efficiency and Stability

   • high efficiency and energy saving: The direct drive design reduces transmission loss, the large rotor runs at low speed to improve compression efficiency, and the energy consumption is 15%-20% lower than that of traditional models.
   • Smooth operation: The symmetrical structure offsets the axial force, the vibration value is lower than 0.5 mm/s, the noise is controlled below 65 decibels, and the service life of the equipment is prolonged.

3. Maintenance convenience

   • oil-free system there is no need to replace lubricating oil and oil filter, and the maintenance workload is reduced by more than 50%.
   • Long life design: The water lubrication parts are made of stainless steel and ceramic materials, which are corrosion-resistant and wear-resistant, and the service life of key parts can reach 80000 hours.

3. Application Scenarios

1. high purity gas field
   • food Processing: Used in food packaging, modified atmosphere preservation and other processes to avoid oil pollution affecting product safety.
   • Pharmaceutical Manufacturing provide clean gas source for pharmaceutical equipment to ensure that pharmaceutical production meets GMP standards.
   • electronic semiconductor: In chip manufacturing, oil-free air can prevent electrostatic damage and impurity pollution.
2. Continuous operation industrial scenario
   • textile Industry: Provide a stable air source for air-jet looms and reduce yarn breakage.
   • chemical production: Drive pneumatic valves and instruments to ensure precise control of the process.
   • Sewage treatment: Provide oil-free air for aeration tanks to improve biological treatment efficiency.

4. technology development trend

at present, oil-free screw air compressors are developing in the following directions:

• intelligent control: Integrated IoT technology for remote monitoring, fault warning and energy efficiency optimization.
• Modular design: Through the combination of standard components, it can meet the customization requirements of different scenarios.
• Environmental protection upgrade A closed water circulation system is adopted to reduce water consumption and wastewater discharge.

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.