BOREHOLE GENERATOR Russian patent published in 2011 - IPC E21B47/00 H02K21/38 

FIELD: electricity.

SUBSTANCE: device 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. At that, inside protective housing there is installed axis on which constant magnets are fixed. Generator rotor is made in the form of cylinder installed between axis and excitation windings. On generator rotor there are longitudinal slots in which magnetic permeable inserts are installed. Magnetic coupling containing drive and driven half-couplings and magnetic permeable partition between them is installed between rotor and generator rotor. Magnetic coupling can be end-type or cylindrical. 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 compensator of pressure and thermal expansion, which is installed in protective housing and interconnected with cavity of rotor or with cavity of drive half-coupling.

EFFECT: improving reliability and power of generator at decreasing diametrical dimensions and weight of electric generator.

9 cl, 3 dwg