screw compressor - Rev B

thingiverse

Human: **Attempt** to utilize a **3D printed screw compressor** as ventilator to combat Covid-19. I was pondering a ventilator that is controlled by the patients themselves. So, high-grade ventilators can be used for critical cases, while mild ones use this one. Or maybe even utilize it at home?!? As an assistant for breathing. Instead of an ambu bag. But that's just me thinking. I have **no medical background** and absolutely **no experience in medical ventilation**. I am simply an engineer trying a different approach to the problem. My design is open-source. If you see potential, use it and adapt it to your needs. Here is a video of the compressor design: https://youtu.be/tTnprEpED4w Here is a video of me testing my design: https://youtu.be/5IAoiMQRYCs Here are the Fusion 360 files: https://a360.co/3b4nH3q Here are the codes for the Arduino: https://github.com/MlePh/3D-printed-screw-compressor With exception of the gears, all parts can be printed with standard settings. Gears with 100% infill. No support needed. I used **PETG**. But **PLA** could also work. **Parts needed for the compressor:** - 5 pcs 608Z ball bearing (used for inlineskates - very common size) - 2 pcs 8mm rods (steel, aluminium, cfk,...) -> cut to 130mm length - 7 pcs M3x30 screws - 10 pcs M3x10 screws - 2 pcs potentiometers brushless DC motor (I used a MultiStar 2216-800kV motor) - ESC for the DC motor - Arduino nano 5V BEC (if the ESC doesn't provide 5V power) - DC power source with more than 12V (I used a 4S lipo battery) If the screws have too much friction inside the cylinder, you may need to sand it. To do that, I designed a grinding tool, that fits the inner diameter of the two cylinders. **Parts needed for the grinding tool:** - Sandpaper (400), cut to 20mm stripes - M10 threaded rod with two screw nuts - 4 pcs M3x10 screws