Dual internal water cooled generator rotor coil centre tap hydroelectric connecting loop

The invention provides a dual internal water cooled generator rotor coil centre tap hydroelectric connecting loop, which comprises a small coil which is positioned at the innermost end and at least one first coil which encloses the small coil. The current enters the small coil from a magnetic pole lead, and each coil comprises a bottom line, a middle line which encloses the bottom line and a surface line which encloses the middle line. The loop is characterized in that: every two coils are connected in parallel; a first bottom line water inlet bend is formed on the end part of the bottom lineof the small coil; a center tap water outlet bend is formed on the middle line of each coil; a water inlet bend is respectively formed on the bottom lines and surface lines of the other coils except the small coil; and the cooling water flows into the coil and the connected coil through the water inlet bends simultaneously. By inflowing water through the bottom lines and the surface lines and discharging water through the