variable frequency twin screw rotary air compressor

variable frequency twin screw rotary air compressor which is two stage

The two-stage frequency conversion twin-screw air compressor combines two-stage compression and frequency conversion drive technology, which greatly improves energy efficiency, reduces energy consumption and ensures long-term stable operation.

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Description

The variable frequency twin screw rotary air compressor utilizes advanced twin-screw two-stage compression technology combined with a frequency conversion drive system. This intelligent design automatically adjusts rotational speed according to real-time air demand, significantly reducing energy waste, start-up impact, and improving equipment life—making it ideal for dynamic industrial environments.

Technical Parameters

  • Flow rate range: 3.4 to 72 m³/min
  • Pressure range: 0.7 to 1.2 Mpa
  • Power range: 22 to 400 kW
  • Drive mode: Permanent magnet frequency conversion speed control
  • Cooling mode: Air-cooled, Water-cooled (optional)

Features of Variable Frequency Twin Screw Rotary Air Compressor

  1. High efficiency and energy saving:
    • Frequency conversion control automatically matches motor speed to air demand, with energy savings over 30%.
    • Two-stage compression reduces internal leakage and improves efficiency; saves 10%-15% energy compared to single-stage models.
    • Certified for top-tier energy efficiency, lowering long-term operating costs.
  2. Stable and reliable:
    • Two-stage compression lowers exhaust temperature and internal load, extending parts life.
    • Uses high-precision SKF or NSK bearings for long-term stability.
    • Efficient oil-air separation system delivers output air oil content ≤3ppm.
  3. Intelligent control, easy maintenance:
    • Real-time intelligent monitoring and parameter adjustment, supports remote monitoring.
    • Optimized for easy maintenance—quick oil separator replacement reduces downtime.
  4. Flexible for various conditions:
    • Air-cooled or water-cooled options for different environments.
    • Frequency conversion drive smooths out load fluctuations, reducing mechanical wear and enhancing system stability.

Working Principle

  1. Air intake: Filtered air enters the first stage screw rotor, where it’s compressed as the volume decreases.
  2. First stage compression: Air is initially compressed and cooled by an intercooler, raising efficiency.
  3. Second stage compression: Pre-cooled air is compressed further for the required working pressure.
  4. Frequency conversion adjustment: The controller matches compressor speed to actual demand, reducing frequent starts/stops and saving energy.
  5. Oil and gas separation and exhaust: Compressed air passes through an oil-gas separator to output high-quality air (oil ≤ 3ppm) for storage or direct use.

Application Fields

  • Manufacturing: CNC machinery, automated lines, pneumatic tool drives.
  • Automotive: Welding, painting, assembly compressed air supply.
  • Metallurgy: Blast furnace blast, steel continuous casting, and other intensive uses.
  • Textile: Provides constant air for air jet looms and airflow spinning.
  • Electronics: Clean air for precision manufacturing and pollution prevention.
  • Food & Medicine: High-purity compressed air for aseptic production, packaging, and drug delivery.
  • Chemical & Energy: Suitable for gas transportation, explosion-proof environments, and related uses.