How do vacuums work? Well that’s a tough one to answer without a bunch of jabber. If you understand how an impeller pump works, then you’ll easily get how a vacuum works. Vacuums just spin a whole lot faster (15- 22,000 RPM) and maintain air vacuum rather than liquid vacuum. Give me 20 seconds I’ll do everything I can to inform you! Electric current spins a vacuum motor. As these motors spin, fans which have angled blades spin. They force air forward, toward the vacuum’s exhaust. Air and solid particles are driven forward, the density of particles (and therefore the air pressure) increases in front of the fan and decreases behind the fan. A drop-in pressure behind the fan is similar to that of a straw in a cup of liquid. The pressure level in the area behind the motor drops below the pressure level outside the vacuum cleaner. This creates suction, a partial vacuum, inside the vacuum cleaner. Air pushes itself into the vacuum cleaner through the intake port because the air pressure inside the vacuum cleaner is lower than the pressure outside. While this continues the air is always in a state of vacuum. Yup blah blah blah blah.