A collector ring balance structure with water-cooled rotor

Abstract

The invention provides a collector ring balancing structure equipped with a water-cooled rotor. The collector ring balancing structure comprises a collector ring rotor, wherein a water inlet pipe is arranged in the collector ring rotor; the collector ring rotor is provided with collector rings and a fan; the collector ring rotor is connected with a magnetic pole lead; vent holes are arranged alongthe circumferential direction of each collector ring; and the collector ring balancing structure is characterized in that a solid arc segment free of the vent hole is arranged at the part, in a 180-degree symmetric direction of the magnetic pole lead, of each collector ring, thereby artificially generating unbalance in the opposite direction to offset the unbalance generated by the collector rings and the magnetic pole lead. According to the collector ring balancing structure equipped with the water-cooled rotor, through removing the vent holes of the collector rings and carrying out counterweight design on the collector ring rotor, the unbalance generated by the magnetic pole lead and the collector rings are offset, and vibration of an extended end is effectively improved.

Description

technical field [0001] The invention relates to a collector ring balance structure for a water-cooled rotor. Background technique [0002] In the rotor water-cooled turbogenerator, due to the need for water flow, in order to ensure that the integrated structure of the waterway is not blocked and there is no risk of water leakage, the collector rings are all coaxial with the generator rotor. In the collector ring structure based on a large-capacity water-cooled rotor, due to the increase in the rated excitation current and excitation voltage of the generator, the increase in the number of collector ring brushes will lead to the lengthening of the collector ring rotor 5, and sometimes the generator set is also used in the expansion On a steam turbine with a relatively large volume, the rotor has sufficient length to ensure that the brushes will not disengage from the slip ring when the generator excitation is satisfied and the expansion is large, which will cause the slip ring...

AI Technical Summary

Problems solved by technology

When the rotor rotates at high speed, a large centrifugal force will be generated at the magnetic pole lead 1 to act on the entire slip ring rotor 5, resulting in an unbalance (this unbalance will be amplified on a longer rotor), which will cause the slip ring rotor The extended end of 5 vibrates greatly, which does not meet the design requirements

In the prior art, the filler wire 7 (false copper wire) and the insulating pads 4, 8 did not take into account the unbalance of the slip rings 2, 3 themselves and the magnetic pole lead wire 1, resulting in the failure of the critical rotor of the entire shafting system

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