Rotor shaft-penetrating lead structure

By employing potting compound and epoxy pads in the rotor through-shaft lead structure, the heat dissipation and insulation problems in high-power generators are solved, improving insulation performance and structural stability, and ensuring long-term stable operation of the generator.

CN224503083UActive Publication Date: 2026-07-14SEC ELECTRIC MACHINERY
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Patent Information

Application Number
CN202521484059.2
Authority / Receiving Office
CN · China
Patent Type
Utility models(China)
Current Assignee / Owner
Filing Date
2025-07-16
Publication Date
2026-07-14
Estimated Expiration
2035-07-16

AI Technical Summary

Technical Problem

Existing rotor through-shaft lead wire structures have poor heat dissipation performance in high-power generators, unstable insulation performance, heavy conductor weight, safety hazards, and are prone to aging and loosening, leading to failure modes such as slip ring burnout.

Method used

The structure consists of a rotor shaft, through-shaft conductive busbars, insulating blocks, pressure plates, and cover plates. The gap between the conductive busbars and deep holes is filled with potting compound, and the structure is fixed with epoxy pads and pressure plates to form an insulation and heat dissipation system, ensuring insulation performance and structural stability.

Benefits of technology

It achieves good insulation performance, significant heat dissipation effect, lightweight structure, reduced conductor bus temperature, and improved generator operation stability and reliability.

✦ Generated by Eureka AI based on patent content.
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Abstract

The utility model relates to a rotor shaft-penetrating lead structure, and belongs to the technical field of motors. The structure includes: a rotor shaft having a deep hole and an inclined hole connected to the deep hole; the shaft penetrating conducting bar penetrates through the deep hole and the inclined hole; a pouring sealant is filled between the shaft-penetrating conducting bar and the deep hole; an insulating block is arranged between the shaft penetrating conducting bar and the inclined hole; and the pressing plate is connected with the rotor shaft through a fastener, at least part of the pressing plate is in contact with the insulating block, and the pressing plate is used for pressing the insulating block. The insulating block is a split epoxy cushion block, and the inner side of the insulating block is in contact with the pouring sealant and is fixed by the pouring sealant. One insulating block is provided with two pressing plates, and a gap is formed between the two pressing plates for the shaft-penetrating conducting bar to pass through. The shaft-penetrating conducting bar is composed of a plurality of layers of stacked flexible conducting strips. A cover plate is arranged at one end, far away from the inclined hole, of the rotor shaft, and a glue pouring hole is formed in the cover plate and used for pouring of pouring sealant. The rotor shaft-penetrating lead structure is simple in structure and convenient to install, leakage of pouring sealant can be effectively prevented, damage of the insulating blocks to the shaft-penetrating conducting bar under the action of centrifugal force is reduced, and the reliability and the service life of the rotor shaft-penetrating lead structure are improved.
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