BOREHOLE GENERATOR Russian patent published in 2011 - IPC E21B47/00 H02K21/12 

FIELD: electricity.

SUBSTANCE: borehole generator is equipped with protective housing, electric connector, at least one attachment fitting, rotor with hydraulic turbine, constant magnets, rotor of generator and excitation windings which are fixed inside protective housing. Magnetic coupling containing drive and driven half-couplings and magnetic permeable partition between them is installed between rotors. Discs having radial slots in which constant magnets are installed are fixed on generator rotor. Excitation windings are installed on both sides of discs. Tight magnetic permeable partition containing parts from magnetic permeable material is arranged between driven and drive half-couplings. At that, drive half-coupling is connected to rotor, and driven coupling is connected to generator rotor. Inner cavity of drive half-coupling is filled with lubricating fluid. On upper edge of rotor there is filling opening of lubricating fluid to the cavity of drive half-coupling. Generator includes at least one pressure and temperature expansion compensator interconnected with cavity of drive half-coupling.

EFFECT: simplifying the design, improving reliability and power of generator at decrease of diametrical dimensions and weight of electric generator.

3 dwg