SUPPLY TURBO GENERATOR FOR BOREHOLE EQUIPMENT Russian patent published in 2008 - IPC E21B47/22 

FIELD: electrical engineering.

SUBSTANCE: invention pertains to electrical machines and is meant for supplying borehole equipment. The turbo generator has a protective case, at least one attachment unit, an immoveable axis with a hole through the centre, on which a stator is fitted with an exciting coil, connected to an electrical connector, and a rotor mounted on bearings, with at least one turbine, the inside of which fitted with a group of permanent magnets. Inside the rotor there is an extra group of permanent magnets. On the stator there is an extra exciting coil, connected to an electrical connector, fitted on the lower end of the stator. The rotor has upper and lower parts, mounted on three bearings, fitted on an immoveable axis, which also has upper and lower parts, joined together. One of the exciting coils is low voltage and the second is heavy loaded. Cables from the exciting coils to the electrical connector pass through the opening inside the immoveable axis. The inner cavity of the turbo generator is filled with lubricating liquid. The lubricating liquid filling hole is made on the top and has a screw.

EFFECT: reduction of diameter dimensions and weight of the generator.

3 cl, 1 dwg