Pumps – Motor driven – Electric or magnetic motor
Patent
1976-08-20
1978-09-26
Husar, C. J.
Pumps
Motor driven
Electric or magnetic motor
310112, 415 90, F04B 1700
Patent
active
041165926
ABSTRACT:
A turbomolecular high-vacuum pump has a substantially vertically extending cylindrical casing provided with inlet and outlet pipes for gas being evacuated. The casing accommodates, in the top part thereof, a stator having vanes disposed between the rotor vanes so as to define passages for gas being evacuated. The rotor is connected to a high-speed hollow shaft extending substantially vertically. The shaft is journalled in bearings and connected to the rotor by means of a high-frequency electric drive motor. The pump incorporates means for lubricating the bearings. The stator of the high-frequency drive motor of the pump is electrically coupled to the stator of a generator of a machine-type frequency converter which has an induction drive motor. Another, low-speed shaft is journalled in the bearings in the bottom part of the pump casing coaxially with the high-speed shaft, one shaft embracing the other. The induction motor rotor and the rotor of the generator of the machine-type frequency converter are mounted on the low-speed shaft, the stators of both devices being fixed within the pump casing. Means for lubricating the bearings of both shafts is disposed at the lower end of the low-speed shaft.
REFERENCES:
patent: 3168977 (1965-02-01), Garnier et al.
patent: 3628894 (1971-12-01), Ferguson et al.
patent: 3749528 (1973-07-01), Rousseau et al.
patent: 3753623 (1973-08-01), Wutz
patent: 3947193 (1976-03-01), Maurice
patent: 3969042 (1976-07-01), Bachler
Cherny Viktor Yakovlevich
Dobrokhotov Leonid Vasilievich
Galperin Boris Grigorievich
Meljukhov Vladimir Petrovich
Mikhailov Mikhail Mikhailovich
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