Transformer coil bending-shaped oil guide system

Abstract

The invention relates to a transformer coil bending-shaped oil guide system. A longitudinal oil channel-bending-shaped oil guide structure is arranged in a coil. The transformer coil bending-shaped oil guide system is characterized by comprising a coil wire, a transverse oil channel, a coil inner diameter side longitudinal oil channel, a coil outer diameter side longitudinal oil channel, a coil middle longitudinal oil channel, an inner oil stopping ring and an outer oil stopping ring. Each coil pie in the coil is divided into three equal portions. According to the odd number coil pies, the longitudinal oil channels are only arranged between a first portion coil pie and a second portion coil pie. According to the even number coil pies, the longitudinal oil channels are only arranged between a second portion coil pie and a third portion coil pie, a result is calculated according to the height of the coil, the number of the coil pies and distribution of oil flow and an inner oil stopping clapboard and an outer oil stopping clapboard are arranged along the height direction of the coil. The transformer coil bending-shaped oil guide system is high in filling coefficient, good in cooling effect, excellent in performance parameters and capable of effectively guaranteeing coil heat dissipation effect, reducing coil temperature rise and satisfying the requirement for transformer service life of a user.

Description

technical field [0001] The invention relates to a zigzag oil guide system for a transformer coil. Background technique [0002] At this stage, with the development of high-voltage and large-capacity AC-DC power transmission systems, the capacity of a single transformer coil is getting larger and larger. At the same time, considering that the requirements for transformer impedance voltage are also increasing, the radial size of the coil is also increasing. Large; due to the influence of inter-cake capacitance, oil flow velocity, and economy, the height of the horizontal oil passage cannot be too large; a "dead oil zone" is easily formed in the middle of the line cake. If the longitudinal cooling oil passage is not designed, the wire here The generated heat cannot be dissipated, which will increase the local temperature rise, which will seriously affect the load capacity and service life of the transformer. [0003] In the past, two longitudinal oil passages were designed in ...

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Problems solved by technology

[0002] At this stage, with the development of high-voltage and large-capacity AC-DC transmission systems, the capacity of a single coil of a transformer is increasing. At the same time, considering that the requirements for transformer impedance voltage are also increasing, the radial size of the coil is also increasing. Large; due to the influence of inter-cake capacitance, oil flow velocity, and economy, the height of the horizontal oil passage cannot be too large; a "dead oil zone" is easily formed in the middle of the line cake. If the longitudinal cooling oil passage is not designed, the wire here The generated heat cannot be dissipated, which will increase the local temperature rise, which will seriously affect the load capacity and service life of the transformer

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