COIL OF SUBMERSIBLE ELECTRIC MOTOR ENCAPSULATED INTO HEAT SHRINK TUBE Russian patent published in 2012 - IPC E21B43/12 H02K5/132 H02K3/34 

FIELD: electric engineering.

SUBSTANCE: the invention relates to submersible electric motors used in pumps. The electric motor comprises a frame, numerous stator laminations inside the frame, several rotors. Each stator lamination has a central window and several slots. The rotors are positioned inside the space formed by the central windows of stator laminations. The coil wires pass through each slot of each stator laminations. The heat shrink tube wraps the coil wires and tightens them into cords. Furthermore, the space between the heat shrink tube around the coil wires and the inner space of stator laminations allows the fluid flow through stator lamination slots. The heat shrink tube is installed into the stator lamination slots to improve the heat transfer in the electric motor. Numerous wires are inserted into the slots in stator laminations. The coil wires are heated, shrinking the heat shrink tube around the coil wires and tightening them into cords, in such a way so the gap between the heat shrink tube and inner surface of the stator laminations allows the fluid flow through wire cords inside the stator laminations.

EFFECT: improved heat transfer during cooling of submersible electric motors used in pumps, improved coil wires protection from wearing.

11 cl, 3 dwg