Molecular vacuum pump features

Molecular vacuum pump molecular vacuum pump is mainly the use of high-speed rotation of the rotor to transfer momentum to the gas molecules, the gas molecules to achieve directional movement speed, which is compressed, was driven to the exhaust port after a pre-evacuated Vacuum pump traction molecular vacuum pump, gas molecules and high-speed rotor collision to obtain momentum, was driven to the pump outlet. Molecular vacuum pump its main features are: 1, the pump chamber has a rotatable rotor, the rotor with grooves around and separated by a baffle. Each groove is equivalent to a single-stage molecular vacuum pump, the latter level of the entrance and exit of the previous level. 2, 0.01mm clearance between the rotor and the pump housing, gas molecules from the entrance into the pump chamber, carried by the rotor to the outlet side, the exhaust pipe by the anterior pump pumped away. 3, molecular vacuum pump has the advantage of short start-up time, in the molecular flow state has a high compression ratio, can remove all kinds of gas and steam, especially for pumping heavier gases. 4, its shortcomings: pumping speed is small, sealing gap is too small, poor reliability, easy to mechanical failure, so in addition to special needs, but rarely used. It was replaced by a diffusion pump with simple structure and pumping speed. With the advent of a widely used oil diffusion pump, a great deal of work has been done to improve the molecular vacuum pump. Such as Holweck, Siehbahn, Gondet and so on, have made many improvements and improvements to the Gaede-type molecular vacuum pump. Many different new types of traction molecular vacuum pumps have been proposed. However, due to its complex structure and low pumping speed, it has not been widely used. However, with the development of science and technology and human innovation, I believe that in the near future molecular vacuum pumps will have a brilliant record. Related Articles: Roots vacuum pump features dry screw vacuum pump

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