COOLING SYSTEM FOR ASYNCHRONOUS MACHINE OF VETOHIN FOR OIL-AND-GAS WELLS (AMV OGW) Russian patent published in 2012 - IPC H02K5/132 H02K5/20 H02K9/19 

FIELD: electricity.

SUBSTANCE: asynchronous machine (AMV OGW) contains housing (1) where multipack stator (2) with winding (3) is accommodated, on shaft (5) made of 20X13 steel, multipack rotor (6) with screw-groove multistart thread is mounted for strata water pumping via non-magnetic operating clearance (10). To equalise temperatures throughout the machine the inlet of cold and the outlet of heated strata water is executed through alternating by length symmetrical groups oh holes in the housing (14-16) and (17-18), shifted by angle β/2 relative to each other, and the holes along cross-section radius are shifted by angle β in each group. Flow of strata water via three hemispheric channels (21) between stator and housing, shifted by 120° equalises temperature along stator length.

EFFECT: creation of effective system of cooling with surrounding strata water for internal active parts of multipack electric machines of vertical open configuration for oil-and-gas wells.

2 cl, 3 dwg