Rotary kinetic fluid motors or pumps – Smooth runner surface for working fluid frictional contact
Patent
1990-01-08
1991-04-30
Look, Edward K.
Rotary kinetic fluid motors or pumps
Smooth runner surface for working fluid frictional contact
415131, 417361, F01D 136
Patent
active
050113682
ABSTRACT:
A vacuum pump of the type having a Gaede channel, the pump comprising a stator (1) and a rotor (2) driven to rotate inside the stator, the stator including a suction inlet (12) and a delivery outlet (13). The active portion of the rotor situated between the suction inlet and the delivery outlet is hemispherical in shape (9) and is disposed inside a cavity (10) of the stator which is likewise hemispherical in shape. The axis .delta. of said rotor coincides with the said axis of the hemispherical cavity of the stator. Suction takes place at the large circle end of the hemispherical rotor via radial clearance j.sub.a between the rotor and the stator, and delivery takes place at the pole end of the hemispherical rotor. An adjustment distance piece (14) for axially positioning the rotor (2) relative to the stator (1) is provided so that the radial delivery clearance j.sub.r is smaller than the radial suction clearance j.sub.a.
REFERENCES:
patent: 651400 (1900-06-01), Trouve et al.
patent: 1810083 (1931-06-01), Norinder
patent: 2001800 (1935-05-01), Silbermann
patent: 2730297 (1956-01-01), Van Dorsten et al.
patent: 3666374 (1972-05-01), Becker
patent: 4642036 (1987-02-01), Young
Frindel Sebastien
Mathieu Luc
Alcatel Cit
Larson James A.
Look Edward K.
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