A method for installing a lead wire of a water turbine generator stator core penetrating screw rod

By pressing a cold-pressed joint and installing a heat-shrink tubing on the stator core bolt of a hydro-generator, and combining it with a combination structure of threaded sleeve, gasket, and insulating cover, the problems of unreliable lead wire connection and poor sealing are solved, achieving reliable electrical connection and sealing, and making it suitable for online monitoring of the stator core bolt of a hydro-generator.

CN115664098BActive Publication Date: 2026-07-03DONGFANG ELECTRIC MACHINERY
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
DONGFANG ELECTRIC MACHINERY
Filing Date
2022-11-04
Publication Date
2026-07-03

AI Technical Summary

Technical Problem

Existing technologies cannot effectively guarantee the reliability and sealing of the lead wire connection for monitoring electrical quantities of the stator core screw of a hydro generator, and are susceptible to vibration and carbon buildup.

Method used

The system employs a lead wire crimped cold-pressed connector, heat shrink tubing, and a combination of threaded sleeves, gaskets, and insulating caps to ensure reliable electrical connections and overall sealing. Sealant is used to prevent loosening and carbon buildup.

Benefits of technology

It achieves a good electrical connection and reliable mechanical strength between the screw end and the lead wire, ensures the overall structural sealing, prevents the impact of vibration and carbon buildup on insulation, and provides a reliable foundation for online monitoring.

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Abstract

This invention discloses a method for installing the lead wire of the through-core screw of a hydro-generator stator, relating to the field of online monitoring technology for hydro-generator operation. The method includes the following steps: S1, lead wire preparation; S2, assembling the lead wire with the screw sleeve; S3, installing a gasket; S4, assembling the screw sleeve with the end of the screw; S5, installing an insulating cover; and S6, installing the gland. This method ensures a good electrical connection and reliable mechanical strength between the screw end and the lead wire, and guarantees the overall structural sealing, preventing carbon buildup from affecting the screw insulation. It provides a foundation for online monitoring of the insulation of the through-core screw to the stator core.
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