AVS 45th International Symposium
    Vacuum Technology Division Tuesday Sessions
       Session VT-TuM

Paper VT-TuM5
Improved Design of a Multi-Groove Vacuum Pump Compressing Directly to the Air

Tuesday, November 3, 1998, 9:40 am, Room 329

Session: Molecular Drag Pumping
Presenter: S.E. Valamontes, Technological and Educational Institute of Athens, Greece
Authors: E.S. Valamontes, Technological and Educational Institute of Athens, Greece
S.E. Valamontes, Technological and Educational Institute of Athens, Greece
C.N. Panos, Technological and Educational Institute of Athens, Greece
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For a multi-groove vacuum pump the shortening of its length, during its function, is related to the increase of the velocity of molecules of the pumping gas. We are trying to achieve it without increasing the number of the turns, which leads to the increase of the velocity, but by using some new ideas. We study the exact behavior of the coefficient of internal viscosity by introducing a disc with blades in the pump which indirectly leads to the desirable shortening of its length and finally to have a pump compressing directly to air. The appropriate shape of the disk and its design are the main problems of the present work.