Arrangement for flooding high speed vacuum pumps

Details Arrangement for flooding high speed vacuum pumps Arrangement for flooding high speed vacuum pumps

1991-07-11

1993-05-11

Look, Edward K.

Rotary kinetic fluid motors or pumps

Smooth runner surface for working fluid frictional contact

415 13, 417293, F04D 1904, F04D 2700

Patent

active

052096319

ABSTRACT:
The invention describes an arrangement for optimum flooding of high speed vacuum pumps. The actuation of the flood valve (6) is controlled by the forces, which, among other things, are exerted upon the rotor by the flooding process. These forces are determined and used to actuate a flood valve controlling entry of the flooding gas. Such forces can be measured in active magnetically supported rotors by masuring the currents in the magnetic bearings (10 and 12). In case of hybrid bearing systems and purely mechanical bearing systems, force measurement is possible indirectly by means of measuring the distance or spacing between the rotor and the stator, or, alternatively, also by means of force sensors.

REFERENCES:
patent: 4588361 (1986-05-01), Saulgeot
"Soviet Inventions Illustrated", Dewent Publications, Sections P-Q, p. 9009, Apr. 11, 1990.
"Patent Abstracts of Japan", The Patent Office Japanese Govt., p. 93, Jan. 23, 1989.

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