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

Abstract

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 line of 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 center tap, the connecting loop increases the water flow, can reduce the water route by half at most, greatly improves the cooling margin of the rotor coil and improves the service life of the unit.

Description

technical field [0001] The invention relates to a water-electric connection method for a middle tap of a rotor coil of a double-water inner-cooled turbogenerator, which can effectively reduce the temperature rise of the rotor coil and belongs to the technical field of the rotor of a double-water inner-cooled generator. Background technique [0002] The rotor coil of the double water internally cooled generator uses water as the cooling medium for cooling. The cooling water takes away the coil heat by flowing in the coil. The water and electricity connection of the rotor coil indicates the flow direction and circuit connection of the cooling water in the coil. The rotor of the traditional double-water internally cooled generator adopts the water and electricity connection method of "bottom line enters water, top line exits". Cooling water flows into the coil from the bottom wire of the coil at the exciter end through the water inlet leg, cools the entire coil, and then flow...

AI Technical Summary

Problems solved by technology

With the increase of generator capacity, if this water and electricity connection is adopted again, the waterway will be longer, the cooling margin of the rotor coil is quite limited, and the temperature rise will increase

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