A fan-shaped cushion block for a converter transformer and its installation method
A converter transformer and spacer technology, applied in the direction of transformer/inductor coil/winding/connection, coil manufacturing, etc., can solve problems such as transformer oil passing, reduce temperature rise, smooth axial oil flow, and improve electrical strength Effect
Active Publication Date: 2012-02-22
TBEA SHENYANG TRANSFORMER GRP CO LTD
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Problems solved by technology
Because the ±800kV converter transformer coil is equipped with an axial oil channel to reduce the temperature rise of the converter transformer under long-term working voltage, the traditional fan-shaped pad is set between the wires of the adjacent cakes of the coil, and the fan-shaped body of the fan-shaped pad It is a closed structure and cannot allow transformer oil to pass through, so it cannot meet the above requirements
Method used
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Embodiment Construction
[0019] like figure 1 , 2 As shown, the fan-shaped spacer 1 for the converter transformer of the present invention is installed in the vacancy after the transposition of the wire, and has a fan-shaped body 11, and the fan-shaped body 11 is provided with an open slot 12; the open slot 12 is multiple, and the coil The axial oil passages correspond one by one. The slot spacing of the plurality of open slots 12 is the thickness of the transformer coil wires; the segment 11 has a block 13 extending from the inner diameter side to the center of the circle. In order to ensure the electric strength of the coil, the fan-shaped spacer 1 must be made of laminated cardboard. At the same time, the periphery of the fan-shaped spacer 1 must be chamfered, the surface treatment should be smooth and free of burrs, and its widthwise size cannot exceed the widthwise size of the coil.
[0020] like image 3 , 4 As shown, in this embodiment, the fan-shaped pad 1 is applied to the coil transposit...
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The invention relates to a fan-shaped pad for a converter transformer and an installation method thereof. The fan-shaped pad is installed in the vacant place after the transposition of the wire, and has a fan-shaped body, and an opening groove is arranged on the fan-shaped body; the method of the invention includes the following steps : Under the support of the inner support bar, the wire is wound to the specified number of turns and then transposed and continues to be wound; the fan-shaped spacer is used to supplement the vacant position due to the wire transposition; the block on the fan-shaped spacer is stuck on the line On the stay inside the circle. Applying the large-capacity converter transformer coil of the present invention does not deform the wire at the transposition during the pressurization process, and at the same time ensures that the coil surface at the transposition is flat and free of depressions, thereby improving the electric strength of the coil and ensuring the axial oil flow of the coil on the other hand Smooth, reduce the temperature rise of the converter transformer under long-term working voltage and other problems.
Description
technical field [0001] The invention relates to a transformer preparation technology, in particular to a fan-shaped cushion block for a converter transformer and an installation method thereof. Background technique [0002] In the ±800kV converter transformer high-voltage power equipment, the fan-shaped spacer is generally used at the transposition of the spiral coil. Its function is to ensure that the wires at the transposition of the coil are not deformed during the coil compression process, and at the same time ensure that the transposition of the coil is not deformed. The surface of the coil is flat and free of depressions, thereby improving the electrical strength of the coil. Because the ±800kV converter transformer coil is equipped with an axial oil channel to reduce the temperature rise of the converter transformer under long-term working voltage, the traditional fan-shaped pad is set between the wires of the adjacent cakes of the coil, and the fan-shaped body of the...
Claims
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IPC IPC(8): H01F27/28H01F41/06
Inventor 高兴耀礼建石曲菠
Owner TBEA SHENYANG TRANSFORMER GRP CO LTD