Fluid rotating apparatus

Details Fluid rotating apparatus Fluid rotating apparatus

1991-08-01

1993-03-30

Bertsch, Richard A.

Pumps

Condition responsive control of pump drive motor

In response to pump speed

417 45, 417203, 417205, 4174234, 4182011, 318 77, 318 85, F04C 2300, F04D 1904

Patent

active

051978610

ABSTRACT:
A fluid rotating apparatus according to the present invention is designed to promptly achieve an extremely high degree of vacuum from promptly atmospheric pressure promptly by its single apparatus. Moreover, high-speed synchronous rotation of the rotary shafts of the apparatus is controlled by use of a rotary position detecting sensor, to thereby avoid control mechanical contact thereof with a gear or the like. In addition, hydrostatic bearing are employed for supporting the rotary shafts to avoid of mechanical abrasion and the use of lubricant oil.

REFERENCES:
patent: 2640428 (1953-06-01), Houghton
patent: 4712048 (1987-12-01), Rebsamen
patent: 4758132 (1988-07-01), Hartwig
patent: 4797068 (1989-01-01), Hayakawa et al.
patent: 4808077 (1989-02-01), Kan et al.
Patent Abstracts of Japan "Multichannel Type Vacuum Pump", vol. 13, No. 225 (M-830) [3573], May 25, 1989.
"A Generalized Performance Computer Program for Oil Flooded Twin-Screw Compressor", Pawan J. Singh and Ghanshyam C. Patel, Ingersoll-Rand Research, Inc. Princeton, N.J., Sep. 1984, pp. 544-553.
"Computer Modeling for Performance Analysis of Rotary Screw Compressor" Mitsuru Fujiwara and katsuhiko Kasuya, Mechanical Enginerring Research Laboratory, Hitachi, Ltd., Ibaraki, Japan, May 1984, pp. 536-543.
"A New Molecular Pump", Louise Maurice, Proc. 6th Internal. Vacuum Congru. Sep. 1974 Japan, J. Appl. Phys. Suppl. 2, Pt. 1, Aug. 1974.

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