Turbo pump with magnetically supported impeller

Pumps – Motor driven – Electric or magnetic motor

Patent

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Details

4174231, 417356, 415900, F04B 1700, F04B 3504, F03B 1300

Patent

active

051122022

ABSTRACT:
A turbo pump is disclosed, having a magnetically supported impeller. The turbo pump includes a casing (31) made of a non-magnetic material, an impeller (32) provided in the casing (31), a triaxial controlled magnetic bearing provided outside of the casing (31) for magnetically supporting the impeller (32), and a rotor (37) magnetically coupled to the impeller (32) for rotating the impeller. The triaxial controlled magnetic bearing includes a magnetic member (35) provided on one plane of the impeller and a plurality of electromagnets (39) provided in the casing in such a way as to be opposed to the magnetic member. Coupling between the impeller (32) and the rotor (37) is effected by a plurality of permanent magnets (33, 38) respectively provided thereon. In another aspect of the invention, a plurality of stator windings for generating the rotating magnetic field may be provided on the side of the stator in place of rotating means utilizing a magnetic coupling.

REFERENCES:
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patent: 3575536 (1971-04-01), Jacobs et al.
patent: 4642036 (1987-02-01), Young
patent: 4643641 (1987-02-01), Clausen et al.
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patent: 4806080 (1989-02-01), Mizobuchi et al.
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patent: 4944748 (1990-07-01), Bramm et al.
patent: 4948348 (1990-08-01), Doll et al.
patent: 4984972 (1991-01-01), Clausen et al.
Kreisel-pumpen, Lexikon, p. 313.
Kreiselpumpen, by Troskolanski et al., pp. 301-302.

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