Rotary kinetic fluid motors or pumps – Smooth runner surface for working fluid frictional contact
Patent
1996-03-28
1997-05-27
Look, Edward K.
Rotary kinetic fluid motors or pumps
Smooth runner surface for working fluid frictional contact
415 73, F01D 136
Patent
active
056325975
ABSTRACT:
A thread groove type vacuum pump in which the gap between a rotor and a stator is not subjected to any influence of the rotor temperature and thus the pumping performance does not deteriorate during plasma combustion in a nuclear fusion reactor. The thread groove pumping portion is formed as a circular cone so that the expansion and contraction of the rotor occurs along the generatrix of the circular cone. The pump exhibits supreme pumping performance throughout the whole running mode of the vacuum pumping system of the nuclear fusion reactor because the gap between the rotor and the stator is kept constant despite changes of thermal expansion due to the temperature change of the rotor caused by the different gas loads.
REFERENCES:
patent: 3697190 (1972-10-01), Haentjens
patent: 4746265 (1988-05-01), Luijten
Abe Tetsuya
Hiroki Seiji
Iguchi Masashi
Murakami Yoshio
Nakamura Jun-ichi
Look Edward K.
Osaka Vacuum, Ltd.
Verdier Christopher
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