DOWNHOLE MOTOR SPINDLE SUPPORT Russian patent published in 2010 - IPC F16C17/26 F16C32/06 E21B4/02 

FIELD: engines and pumps.

SUBSTANCE: downhole motor spindle support consists of outer fixed housing and shaft running in axial and radial plain bearings. Set of axial bearings represents annular supports (thrust bearings 7 and end thrust bearings 4) with cross section representing self-conjugate right triangles. Note that basic support plane is perpendicular to spindle support axis. Flat washers 6 are fitted between shaft thrust bearings 7. Elastomer shims 5, 8 represent flat unlocked washers with shaped recesses on load bearing surfaces. Top washer 5 arranged on end thrust bearing 4 has recesses represent circular arcs arranged eccentrically with respect to axis of washer 5 and positive gradient of direction along shaft rotation from edge of washer 5 to its center and rigidity anisotropy in radial system of coordinates: rigidity is greater along shaft rotation than that in reverse direction. Lower washer 8 arranged between fair conical surface of end thrust bearing 4 and thrust bearing 7 have recesses that can be concentric with rigidity anisotropy in radial direction: rigidity is greater to wards center of washer 8, on outside, then that in reverse direction. Proposed support can be filled with oil.

EFFECT: compact design, longer life, smaller materials-output ratio and high reparability, expanded operating performances and ease of manufacture.

4 cl, 4 dwg