Vacuum pump is a device that can discharge gas from a closed container or keep the number of gas molecules in the container decreasing. With the development of the industrial level in our country and the application of vacuum technology in the field of production and scientific research, The working principle for the development of the entire industry is crucial. The working principle of the vacuum pump Now the industry, just a vacuum pump may not be able to meet the needs of several vacuum pump vacuum pumping system composed of common suction to meet the production and scientific research process needs, so choose different types of vacuum pump composed of vacuum pumping Gas unit to extract gas more. So understanding the working principle of various vacuum pumps is very important. Divided according to the needs of the vacuum pump is divided into two types: gas transmission pump and gas capture pump. Gas transmission pump Its working principle is to make the gas constantly inhalation and discharge, in order to achieve the purpose of pumping vacuum pump, the pump basically has two types. 1) varactor vacuum pump: its working principle is the use of cyclical changes in the volume of the pump to complete the process of inhalation and exhaust of a vacuum pump. The gas is compressed before being discharged. 2) Momentum transfer pump: The principle of this pump is to rely on high-speed rotating blades or high-speed jet, the momentum transfer to gas or gas molecules, the gas from the pump inlet to the outlet continuously. Gas trap pump This pump works on the principle that the gas molecules are adsorbed or condensed on the inner surface of the pump, thereby reducing the number of gas molecules in the container to achieve the purpose of pumping the vacuum pump, the following types. 1) Adsorption Pump: It works by virtue of the adsorption of large surface adsorbent (such as porous material) to absorb the physical adsorption of a vacuum pump. 2) Getter Pump: It works by a vacuum pump that uses a getter to trap gas chemically. Getters are usually metals or alloys that exist in the form of lumps or deposited fresh films. 3) getter ion pump: it is to make the ionized gas through the electromagnetic field or the role of the electric field adsorption on the surface of the gettering material, in order to achieve the purpose of pumping. Related Articles Centrifugal jet vacuum pump structure principle and application Slide valve vacuum pump schematic
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