An oil-immersed transformer

By designing an alternating breathing mechanism and a drying mechanism, the automatic regeneration of the moisture-absorbing shell of the oil-immersed transformer is achieved, solving the problem of desiccant failure in a single cavity, ensuring the insulation performance of the transformer and reducing maintenance costs.

CN122136139BActive Publication Date: 2026-07-07JIANGSU NARI TURBOSTAR ELECTRIC +1
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
JIANGSU NARI TURBOSTAR ELECTRIC
Filing Date
2026-04-15
Publication Date
2026-07-07

AI Technical Summary

Technical Problem

Existing desiccant desiccators for oil-immersed transformers use a single-cavity desiccant, which is prone to saturation and failure after long-term operation. They require regular manual replacement, increasing maintenance costs and potentially causing moisture to enter the transformer oil, affecting insulation performance.

Method used

An alternating breathing mechanism is designed, in which a drive motor drives a rotating frame to intermittently cycle three sets of moisture-absorbing shells in a moisture-absorbing, drying, and standby mode. The desiccant is dried and regenerated using waste heat from the transformer. Combined with a self-sealing mechanism and a drying mechanism, the desiccant is ensured to remain effective.

Benefits of technology

This avoids desiccant saturation due to moisture absorption, reduces maintenance costs, ensures transformer insulation performance, enables automatic regeneration and continuous operation of the desiccant, and reduces downtime risks.

✦ Generated by Eureka AI based on patent content.

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  • Figure CN122136139B_ABST
    Figure CN122136139B_ABST
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Abstract

The application relates to the technical field of transformers, and relates to an oil-immersed transformer which comprises an oil tank, the bottom of the oil tank is provided with a support frame, the outer wall of the oil tank is uniformly provided with heat dissipation fins, the top of the oil tank is fixedly installed with an upper sealing plate, an iron core is arranged in the oil tank, a coil winding is arranged on the iron core, the coil winding is connected with a wire sleeve fixed at the top of the upper sealing plate through a wire; one corner of the top of the upper sealing plate is fixedly provided with an oil storage tank, and the oil storage tank is provided with an alternating breathing mechanism; the driving motor intermittently drives the rotating frame to rotate at regular time, so that three groups of moisture absorption shells are intermittently circulated in the mode of moisture absorption, drying and standby to participate in the drying process, the single moisture absorption shell is prevented from being long-term worked to cause the internal drying agent to be saturated with water adsorption and be disabled, the air cavity of the oil storage tank can always be connected with dry air, the moisture is effectively prevented from invading the transformer oil, the insulation performance of the transformer is ensured to be stable, the drying agent does not need to be frequently replaced by manual work, and the maintenance cost and the shutdown risk are reduced.
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