TURBOGENERATOR SHAFT STUFFING ARRANGEMENT Russian patent published in 2007 - IPC H02K5/124 E21B47/22 

FIELD: electrical engineering and geophysics; electrical machines feeding separate borehole navigation and geophysical instruments in studying bored oil-gas wells.

SUBSTANCE: proposed arrangement designed for stuffing stator shaft of turbogenerator incorporating sealed shaft mounted on fixed hollow shaft and rotor installed in bearings which are secured on fixed hollow shaft and shielded by stuffing arrangements is provided with newly introduced screw-and-groove packed bushing that functions as screw pump affording high pressure within stuffing arrangement in turbogenerator inner cavity and overrunning clutch intended to keep screw pump non-reversible; screw-and-groove packed bushing is installed at outlet of rotor body in turbogenerator sealed stator.

EFFECT: enlarged service life of borehole instruments, enhanced reliability of stator shaft packing in power-generating electrical machines.

2 cl, 2 dwg