Working principle and function of vacuum pump

A vacuum pump is a mechanical device used to generate vacuum or low pressure, and its working principle is based on the volume expansion method or gas molecule outflow method. Its function is to continuously reduce the volume of the air or gas inside the pumped body by extracting it, thereby achieving the goal of generating vacuum or low pressure.

Specifically, vacuum pumps mainly work through the following steps:

Extraction of gas: The vacuum pump first draws gas into the pump body through the exhaust valve or gas molecule outlet inside the pump body.

Compressed gas: The vacuum pump further reduces the volume and increases the collision frequency between gas molecules, thereby increasing the internal energy between gas molecules and achieving the effect of gas molecule compression.

Exhaust gas: Introduce air or gas into the pump body again, repeat the above steps until the desired vacuum or low pressure is reached.

The main function of a vacuum pump includes its use in fields such as semiconductors, metallurgy, chemical engineering, biomedicine, and scientific research to provide high-quality vacuum conditions for the completion of manufacturing, cleaning, coating, or testing tasks.