BOREHOLE EQUIPMENT SUPPLY GENERATOR Russian patent published in 2008 - IPC E21B47/00 

FIELD: electrical engineering.

SUBSTANCE: invention pertains to electrical machines and is meant for a supply generator for borehole equipment. The generator has a protective case and at least one attachment point, a rotor with a turbine, fitted on a hollow sleeve, a stator, an exciting coil and permanent magnets. On the supports of the hollow sleeve, there is an extra rotor and a device for non-contact tapping off electrical energy, made in form of primary and secondary coils. The turbine is birotating with oppositely rotating levels, one of which is fitted on the rotor, and the second is fitted on the extra rotor. The permanent magnets are fitted on the extra rotor, and the exciting coil is fitted opposite the permanent magnets on the lower part of the hollow sleeve, on which the primary coil of the non-contact electrical energy tapping device is fitted. The secondary coil is fitted inside the stator. The primary and secondary coils are connected to the exciting coil by intermediate wires for transmission of electrical energy. Inside the hollow sleeve, there is an immoveable bushing, through with cables pass from the coils to the electrical connector. To refill the cavity of the generator with lubricating liquid, there is a filler hole on the stator, covered by a screw, and inside the stator there is spring loaded piston.

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

2 cl, 1 dwg