Vacuum pump refers to the use of mechanical, physical, chemical or physicochemical methods of pumping containers for pumping and obtaining a vacuum device or equipment, simply put, it is a variety of methods to improve, produce and maintain a vacuum in a closed space device, widely used in metallurgy, chemical industry, food, electronic coating and other industries.
Second, what is the use of vacuum pumps
The role of the vacuum pump is to remove gas molecules from the vacuum chamber, reduce the gas pressure inside the vacuum chamber, so that it reaches the required degree of vacuum, there are many industries in the application, such as:
1, petrochemical, energy, and metallurgical manufacturing industry, the use of vacuum pumps can be used to extract the acidic gases, extracting the inflammable and explosive gases, can also be used for evaporation, food, electronic coating and other industries. gas, can also be used for evaporation, distillation, filtration, vacuum drying and other fields.
2, in the field of food processing industry, vacuum pumps are used for sublimation, drying, dehydration, etc., circulating water vacuum pumps can also be used to inflate the bag, add food, open the package by vacuuming, transport packaging materials and products, etc..
3. Small vacuum pumps are also widely used in daily life, including aquariums, footbaths and coffee machines. In addition, small vacuum pumps also have a wide range of applications in gas or liquid analysis equipment, such as PM2.5 air quality testing, 3D printers, as well as medical equipment and health care.
4. Vacuum pumps can also be used in the automotive manufacturing industry, using a form of negative pressure, thus increasing its propulsion.
3. What are the types of vacuum pumps
Vacuum pumps are widely used in major industries. Different industries have different requirements for vacuum pumps, so there are many types of vacuum pumps.
1, according to the working principle classification
(1) gas transfer pump: gas transfer type vacuum pump can be divided into variable displacement vacuum pump and momentum transfer pump, of which variable displacement vacuum pump has reciprocating, rotary vane and many other kinds, momentum transfer pump has molecular vacuum pump, jet vacuum pump, diffusion pump, diffusion jet pump, ion transport pump and many other kinds.
(2) gas trapping pumps: including adsorption pumps, absorbent pumps, absorbent ion pumps, cryogenic pumps and so on.
2, according to the vacuum degree classification
Mainly can be divided into rough vacuum pump, high vacuum vacuum pump and ultra-high vacuum pump three kinds of vacuum pumps, of which high vacuum vacuum pumps and slide valve vacuum pumps, rotary vane vacuum pumps, Roots vacuum pumps three kinds.
3, according to the vacuum pump structure classification
(1) mechanical: this type of vacuum pump is similar to the compressor, belonging to the volumetric type of reciprocating and rotary structure, and belonging to the power type of turbo molecular pumps, which belong to the removal of vacuum pumps.
(2) Jet: there are two forms of jet pumps and diffusion pumps, and there are also booster pumps combining the two together, which also belong to the extracting vacuum pumps.
(3) suction type: relying on physical or chemical methods to make gas molecules sucked on the surface of the pump wall, belonging to the trapping vacuum pump.
4, according to the vacuum pump in the system work function classification
(1) the main pumping pump: to realize the required pressure of the main working pump.
(2) Pre-pumping pump: when the main pumping pump can not start pumping directly in the atmospheric state, it needs pre-pumping pump to pump to a certain pressure first before the main pumping pump can enter the work.
(3) Pre-stage pump: when the main pump can not pump the gas directly into the atmosphere, need to be connected to the pre-pump discharge.
(4) maintenance pump: when the main pumping pump to complete the required pressure to stop working, due to system leakage or surface evaporation, etc., the pressure may rise, so use the maintenance pump to continue pumping.