Secret: how to extract the vacuum pump?

The pump principle of the vacuum pump can be divided into two types of gas capture pump and gas transmission pump, the vacuum pump common vacuum technology can be divided into mechanical and physical methods. Secret: how to extract the vacuum pump? First, the mechanical method 1, the varactor vacuum pump is the use of pump chamber volume cycle to complete the intake and exhaust to achieve the purpose of pumping. This pump points reciprocating, rotary two. 2, momentum transfer pump, which relies 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. Molecular vacuum pump steam jet pump, diffusion pump belongs to this category. Second, the physical method of gas-trapped vacuum pump is a gas molecule is adsorbed or condensed in the pump on the surface of the vacuum pump, the following forms: 1, adsorption pump. A trapping vacuum pump relies on the physical adsorption of adsorbents with large surface area, such as porous material. 2, getter pump. It is a vacuum pump that uses a getter to chemically trap gas. 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 electric field or electromagnetic field adsorption on the surface of the getter material to achieve the purpose of pumping. It has the following two forms. a, evaporative ion pump: ionized gas is absorbed in the pump in an intermittent or continuous manner sublimation (or evaporation) and coated on the suction pump material inside the wall, in order to achieve a vacuum pump. b, Sputtering Ion Pump: A vacuum pump in which the ionized gas in the pump is adsorbed on the getter material that is continuously splashed out by the cathode for the purpose of pumping. (Editor: Li Juan QQ:) Recommended reading: Acting purchasing the top ten brands of vacuum pumps Xiamen 2016 CIFIT

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