b. 做好轴加热部位的保温,内层包裹玻璃丝布,外层包裹2mm厚的电解石棉布。为防止叶轮过热,加热部位的叶轮也包裹2mm厚的电解石棉布,特别是叶轮两侧的石棉布的直径要大出100mm,以便将多余的边压进叶轮槽内,用玻璃丝带整圈捆好。最后,加热部位的保温层外均布瓷套管,在瓷套管外缠绕加热线圈,以便于通风散热。
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