变压器线圈梯形油道垫块

Transformer coil trapezoidal oil channel cushion block

Abstract

The utility model discloses a transformer coil trapezoidal oil channel cushion block. The oil channel cushion block is of a trapezoid shape. The utility model is characterized in that as the oil channel cushion block is of a trapezoid shape, when an electric transformer cake type low-voltage coil adopts a transposition wire or an autoadhesive transposition wire, the transposition space at the inner diameter of the low-voltage coil can be increased without a cross-stay transposition; in terms of conventional square-shaped oil channel cushion block, the circumference of the coil inner diameter turn of the coil and the coil outer diameter turn have quite a large difference, and the percentages of a cushion block compression area of the inner and outer diameter run taking up the whole turn area possess a large difference, thereby the compacting force is not even. The inner diameter side of the transformer coil is the short edge of the trapezoidal cushion block, the outer diameter side of the coil is the long edge of the trapezoidal cushion block, and the short edge is smaller than and the long edge is bigger than the width of the conventional square-shaped cushion block. Under the situation of ensuring heat dissipation property unchanged, the utility model is advantageous in that the percentage of each turn compression area is close to the same; the compacting force is even; mechanical strength is more reliable.
本实用新型公开了一种变压器线圈梯形油道垫块,所述的油道垫块形状为梯形。由于油道垫块的形状为梯形,当电力变压器饼式低压线圈采用换位导线或自粘性换位导线绕制时,可增加低压线圈内径处的换位空间,从而不需跨撑条换位。另外,传统的方形油道垫块由于线圈内径匝与外径匝的周长相差较大,内径匝与外径匝的垫块压紧面积占该匝总面积的百分数差异大,压紧力不均匀。本实用新型所述的变压器线圈内径侧边为梯形垫块的短边,线圈外径侧边为梯形垫块的长边,其短边长度小于传统方形垫块宽度,其长边长度大于传统方形垫块宽度,从而在确保散热性能不变情况下,辐向上各匝压紧面积百分数趋一致,压紧力均匀,机械强度更可靠。

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    CN-103050243-BAugust 05, 2015吴江变压器有限公司变压器绕组