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为优化国际热核聚变实验堆校正场线圈的真空压力浸渍工艺,对线圈圆弧段的充模过程进行了基于Darcy定律的数值模拟和工艺实验。对比了4种注胶方案的流动前沿和压力分布,确定了高效并能减少残留空隙的方案。优化的注胶口位置为沿长度方向1/4和3/4处,出胶口位置为沿长度方向两端和中间处。按优化工艺进行了试验,实测充模时间7.62×103 s,与模拟时间7.67×103 s接近。CT扫描显示试样内部被树脂完全填充,仅有少量空隙,大小约为100~200μm。试样绝缘性能优良,在10kV下漏电流小于1μA。试验结果表明了工艺模拟的可靠性,模拟方法可应用到整个线圈中,确定方案和技术参数。
In order to optimize the vacuum pressure impregnation process of IMC field reactor coils, numerical simulation and process experiments based on Darcy’s law were carried out on the process of filling the circular arc segments. Contrasting the flow front and pressure distribution of the four injection schemes, a scheme of high efficiency and reduction of residual voids was established. Optimized injection port position along the length of 1/4 and 3/4, the outlet position is along the length of both ends and the middle. According to the optimized technology, the experiment was carried out. The actual filling time was 7.62 × 103 s, which was close to the simulation time of 7.67 × 103 s. The CT scan showed that the interior of the sample was completely filled with resin with only a few voids and a size of about 100-200 μm. Excellent insulation properties of the sample, the leakage current of less than 1μA at 10kV. The experimental results show the reliability of process simulation. The simulation method can be applied to the entire coil to determine the program and technical parameters.