The devices that are used to remove gas molecules present in sealed volumes are known as the vacuum pump. It was first invented in the year 1650 and preceded by suction pumps. The vacuum pumps were invented by Otto Von Guericke. There are three techniques according to which the pumps can be categorized; positive displacement pump, momentum transfer pump and entrapment pump.
Why Would You Use Vacuum Pump?
Molecular pump or a momentum transfer pump uses high speed, either of rotating blades or dense fluids in order to knock the gas molecules out from the chambers. Finally, the entrapment pump mechanism is to capture the gases in either absorbed or a solid state which includes ion pumps, getters, and cryopumps.
For those things that require low vacuums, positive displacement pumps are the best and very effective. At times two of these pumps are conjugated with momentum transfer pressure in order to receive higher vacuums. By using this type of configuration, the positive displacement pumps can serve more than two purposes. It has been researched before that of entrapment pumps are used to reach high vacuums and they will require a periodic regeneration system to trap ions or air molecules. This is why their operation would not be productive or short in both high and low vacuums.
There are two classifications of vacuum pumps, the capture or gas binding pumps, and gas transfer pumps. The gas transfer pump follows the mechanism that it can be made use of without any kind of limitation. However, there is a limited amount of gas absorption capacity when it comes to gas binding pumps because they have to be regenerated at intervals that are process-dependent. Gas transfer pumps follow the mechanism of positive displacement pumps.
Applications and Types of Vacuum Pumps
There are several scientific and industrial applications of vacuum pumps such as the moulding process of composite plastic, production of vacuum tubes, electric lamps, CRTs, etc. However, it is very important to conduct vacuum pump servicing for proper maintenance.
The different types of vacuum pumps and they follow different mechanisms.
The Backing or Primary Pumps:
- Oil sealed Rotary Vane pumps that follows the mechanism of wet positive displacement.
- Liquid ring pump follows the mechanism of wet positive displacement
- Diaphragm Pumps follow the mechanism of dry positive displacement
- Scroll pumps follow the mechanism of dry positive displacement
The Booster Pumps:
- Roots pumps follow the mechanism of dry positive displacement
- Claw Pumps follow the mechanism of dry positive displacement
- Screw Pumps follow the mechanism of dry positive displacement
The Secondary Pumps:
- Turbomolecular pumps follow the mechanism of dry kinetic transfer
- Vapor diffusion pumps follow the mechanism of wet kinetic transfer
- Cryopump follows the mechanism of dry entrapment
- Sputter Ion pump follow the mechanism of dry entrapment
There are a few conclusions that can be drawn after looking at the different types of vacuum pumps. The primary conclusion is that the majority of the pumps use the mechanism of positive displacement. Secondly, positive displacement pumps can incorporate both dry and wet functions. Regardless of the type of pump used, vacuum pump servicing is a must for every category in order to perform better. You can find different kinds of pumps in industrial sectors like rotary vane pump, scroll pump, external vane pump, booster pump, lobe pump, and Toepler pump. But these pumps are designed with same mechanics as vacuum pumps.
Those companies that provide very good service solutions can be easily found on the internet. A pump that does not perform to its optimum quality is not reliable and will not last for long. It is very important to conduct regular services to keep them in good working conditions.