组合导线轮、过线轮: 线轮的结构是将瓷圈套在轴承外面。当丝、线在瓷圈表面走过时,瓷圈随丝、线转动,从而将滑动摩擦转换成静摩擦。但在起动及停止时,为克服惯性,会有局部滑动摩擦。 线轮与瓷眼使用时的差别是:瓷眼使用时丝、线与表面是滑动摩擦,使用于丝、线角度变化较小,正压力较小的,要求不高的场合。线轮使用时以静摩擦为主(局部滑动摩擦),使用于丝、线角度变化较大,有一定正压力,要求较高的 场合。近来,随着加工技术的提高,瓷眼也可用于重要场合,但定货时需作说明。 瓷圈的表面光洁度达Ra 0.2,转动时跳动小于0.15,材料选用99%的AL2O3,硬度HRa 88,密度3.85。 线轮又分为过线轮、陶瓷线轮及防跳线器。过线轮的结构是在瓷圈及轴承的两侧配上两片尼龙侧板,也有不加側板直接使用的叫陶瓷线轮。防跳线器的结构是在瓷圈及轴承的两侧配上两片陶瓷侧板,陶瓷侧板上带有反钩,或滚珠,可防止丝,线跳出瓷圈上方。 applicable for reasonable guiding of various enameled wires and silks. the middle ceramic coil is made of precise ceramic and matched with high-speed bearing. the groove is polished to ra0.2. baffles in both sides can prevent the enameled wire to jump out of the groove during winding and the winding tension can be maintained in a stable manner. or, whole ceramic is combined with high-speed bearing, which is called ceramic roller and is applicable for wire or rolling of various winding machines and textile machinery. |