GENERATOR Russian patent published in 2005 - IPC

FIELD: well drilling equipment, particularly to supply power to electronic tools of remote bottomhole sensing systems.

SUBSTANCE: generator has body with exciting coils, fastening unit, rotor with shaft, magnets and turbine installed in the body by means of bearings. Generator also has vessel for reserve liquid lubricant supply formed in front generator part and provided with spring-loaded piston and filling means installed inside it. At least one bearing is inserted in bush, which is centered in central body part. The central body part is closed with axis from another end thereof. The axis is restricted from rotation and has the first annular groove for coil receiving. The axis also has cylindrical ledge with inner boring in which at least rear bearing is installed. Through axial orifice is created inside shaft. Adjusting washer may be installed between front bearing and rotor. Exciting coils may be arranged in the body and fixed from displacement by means of pins. Piston spring may be partly inserted. Filling means may be formed as a valve arranged in rod channel closed with plug.

EFFECT: increased reliability of lubrication system, reduced generator weight and size.

5 cl, 1 dwg