The development trend of vacuum pump - 2020

vacuum pump is a kind of vacuum to obtain equipment, it can make use of physical, chemical or mechanical method extract air from the container, in order to obtain and improve the vacuum environment. There are many different kinds of vacuum pump and many industrial applications have in our country. This paper mainly introduces the classification of the vacuum pump and the performance, merits and demerits of several common vacuum pump and analyzed the development trend of the vacuum pump products in China.

the meaning of the vacuum

in the 17th century, in Italy James physics, reveals the existence of 'vacuum'. Vacuum pressure refers to the given space below an atmospheric pressure gas state, not the state of the gas is called absolute vacuum. In general, we mean the relative to the vacuum, that is to say, in the vacuum technology, there are still several gas molecules per cubic meter of gas in. Usually, the 'vacuum' and 'pressure' used to represent vacuum degree. The lower the pressure within a certain space, the higher the vacuum degree, the higher the pressure, the lower the degree of vacuum. According to the different physical properties of various pressure range, vacuum generally divided into coarse vacuum, low vacuum and high vacuum and high vacuum area.

the classification of the vacuum pump

since the beginning of the 20th century, vacuum technology development, more and more types of vacuum equipment, application fields. According to the working principle of vacuum pump, it can be divided into two basic types: pump and pump. Lose pump mainly through constant suction and discharge gases to achieve the goal of extraction. Gas trap by allowing the gas molecules in the water pump by adsorption or condensation on the inner surface to reduce the number of gas molecules in the container, in order to achieve the purpose of the extraction.

industrial vacuum pump and its development trend of several common

1. Water ring vacuum pump is a kind of variable displacement water pump, can remove inflammable, explosive and corrosive gas and gas containing dust and moisture. The vacuum pump has simple structure, easy to maintain, less wear, high safety, pollution-free advantages, such as for conveying gases, but also has low efficiency, low vacuum degree ( Differential vacuum) Faults. Water ring pump is the main raw materials of casting, casting is easy to be processed, is labor-intensive products. Therefore, domestic products have price advantage than imported pump, is widely used at present. At present, the domestic liquid ring pump manufacturer should be mainly from the weight, volume reduction, reducing energy consumption and improve product efficiency.

2。 Rotary vane vacuum pump is one of the most basic vacuum to obtain equipment. It is a kind of mechanical vacuum pump oil seal type, is suitable for vacuum packaging, vacuum molding, vacuum suction, etc. The extraction of a closed system. However, it should not be used to remove high oxygen content, for metal corrosive, react with pump oil, containing particles of dust, water or other liquid gas. Rotary vane water pump has advantages of small volume, light weight, low noise, high vacuum degree can be obtained. Homemade rotary vane pump has reached the technical standard, the price is far lower than the imported pumps, has a certain competitive advantage. The problems need to be solved at present, the rotary vane pump is rotating impeller material, shaft seal leakage, etc. And the ability to remove water vapor of the development of the rotary vane pump.

3。 Slide valve vacuum pump belongs to a varactor vacuum pump oil seal type, can be used to extract the general gas or contain a small amount of gas condensate. Compared with the rotary vane pump, rotary piston vacuum pump is under high pressure ( 104 mpa) , work under the suction capacity, can work in harsh conditions the advantages to use and durable. Mainly used in vacuum smelting, vacuum drying, vacuum impregnation, vacuum distillation, etc. Plunger pump casting, processing workload is big, so many foreign manufacturers hope to cooperate with the domestic vacuum pump enterprises. In order to speed up the replace imports, domestic plunger pump need to reduce the vibration noise, prevent oil and oil product optimization.

4。 The roots vacuum pump with a quick start, low power consumption, high pump speed. It can extract contains water vapor and dust of gas, and can quickly take out all of a sudden release of gases. Use of roots pump can reduce the pumping time, improve production efficiency.

5。 Dry screw vacuum pump is a newer vacuum to obtain equipment, has a high reliability and long service life, good dynamic balance performance, strong adaptability, multiphase mixture transportation, etc. It can remove corrosive, toxic, dust, gas condensable vapor and other gases. Dry type pump has a wide range of applications. Representative industries including semiconductor industry, chemical industry, and the movie industry. The three industry demand is the main driver of dry pump market. About half of the semiconductor industry to use dry vacuum pump oil seal mechanical pump instead. At present, the domestic dry vacuum pump is rarely used, less than 1% market share. China's semiconductor industry mainly use dry pump. Therefore, we should increase domestic dry vacuum pump research and development efforts, make dry vacuum pump vacuum in China industry new economic growth point.