Oil-free piston compressors are designed to deliver clean, contaminant-free compressed air, making them ideal for applications where air purity is paramount. Here’s a breakdown pressors operate on the principle of reciprocating motion to compress air without the need for oil lubrication within the compression chamber. This is achieved through the use of materials with low friction coefficients and specialized sealing techniques. The process involves the following stages:   

1. Accident vasculaire cérébral (AVC) :
   
   • As the piston moves downward within the cylinder, it creates a vacuum.
   • This vacuum draws in ambient air through the intake valve.
   • The intake valve opens, allowing air to enter the compression chamber.
2. Course de compression :
   
   • The piston then moves upward, reducing the volume of the compression chamber.   
     
      
   • This action compresses the trapped air, increasing its pressure.   
     
      
   • Both the intake and discharge valves are closed during this stage.
3. Accident vasculaire cérébral (AVC) :
   
   • When the compressed air reaches the desired pressure, the discharge valve opens.
   • The piston continues its upward motion, forcing the compressed air out of the cylinder and into the discharge line.
4. Expansion/Clearance Volume:
   
   • A small amount of air remains in the cylinder after the discharge stroke, known as the clearance volume.
   • This air expands during the initial part of the next intake stroke, preparing the cylinder for the next compression cycle.

Component Breakdown:

Oil-free piston compressors consist of several key components:

• Cylindre :
  
  • The chamber where the piston reciprocates, forming the compression space.
  • Made of materials resistant to wear and corrosion.  
    
     
• Piston :
  
  • Un composant cylindrique qui se déplace d'avant en arrière à l'intérieur du cylindre, comprimant le gaz.  
    
     
  • Often made of materials like Teflon or other low-friction polymers.
• Segments de piston :
  
  • Les joints entre le piston et la paroi du cylindre empêchent les fuites de gaz et maintiennent l'efficacité de la compression.
  • Made of materials that can operate without oil lubrication.
• Vilebrequin :
  
  • Convertit le mouvement rotatif du moteur en mouvement alternatif pour le piston.
• Tige de connexion :
  
  • Relie le piston au vilebrequin et transmet le mouvement alternatif.
• Soupape d'admission :
  
  • Allows air to enter the cylinder during the intake stroke.
  • Designed to open and close quickly and efficiently.
• Valve de décharge :
  
  • Allows compressed air to exit the cylinder during the discharge stroke.
  • Also designed for rapid opening and closing.
• Système de refroidissement :
  
  • Essential for dissipating heat generated during compression.
  • Can be air-cooled or water-cooled, depending on the compressor’s size and application.  
    
     
• Moteur :
  
  • Provides the power to drive the crankshaft.
  • Electric motors are most commonly used.
• Air Filter:
  
  • Located on the intake side of the compressor, and cleans the incoming air.
• Crankcase:
  
  • The housing that contains the crankshaft, connecting rod, and other internal components.  
    
     
• Système de contrôle :
  
  • Monitors and controls the compressor’s operation, including pressure, temperature, and other parameters.