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尼龙软化变形温度较低(尼龙6为55～80℃),柴油机风扇工作中又承受一定的风载荷,所以使用一段时间后,扇叶由根部沿径向背曲,叶顶后弯至15mm(附图),改变了风扇轴向斜角和圆弧曲面,使柴油机温升加快。我们采用热定型修理法,用3mm厚的钢板制成大于风扇叶片轮廓尺寸的弧形夹板,弧半径170mm,在两夹板上适当位置钻φ8.5mm的孔7个,再用螺栓固定,夹紧变形叶片,以水煮沸20～30min后,冷却并拆卸曲面夹板。由于叶片根厚顶薄,夹好后即可将变形叶片调整到与根部圆
Nylon softens the deformation temperature is lower (nylon 6 is 55 ~ 80 ℃), the diesel engine fan also withstands some wind load, so after using for a period of time, the blade leaves from the root along the radial buckling, Figure), changed the fan axial bevel and arc surface, so that the diesel engine temperature rise faster. We use the heat-setting repair method, with 3mm thick steel blade profile is greater than the size of the curved plywood, arc radius 170mm, the appropriate position in the two plywood drill φ8.5mm 7, and then bolted and clamped Deformation leaves, with water boil 20 ~ 30min, cooling and demolition curved plywood. As the blade root thick thin top, clip the deformation of the blade can be adjusted to the root circle