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。
The wire roller (DL series) is the commonly used component for the wire passing,it is used in the wire passing position of the coil winding machinethe textile machinery as well.
The porcelain ring is trapped out of the bearing, it will rotate by the threadwire passing on the surface of the ring. Thus the sliding friction has been converted to the static friction. But at the startstop, in order to overcome the inertia, there will be a partial sliding friction.
The difference between the usage of wire rollerceramic ring is: there is a sliding friction between thread, wirethe surface of the ceramic ring, so it is applied for the smaller angle of the wire, lower pressureother such kind of less demanding occasions. The wire roller is mainly used of static friction (part sliding friction); it is applied for the bigger angle of the wire, a certain pressureother such kind of higher occasions. Recently, as improved processing technology, ceramic rings can also be used for important occasions, further illustration will be provided when orders.
The surface polish degree of the porcelain ring reaches Ra0.2; the beating during rotation is under 0.15. We the 99% AL2O3 as the material with the hardness of HRa88the density of 3.85.
There are three types of the wire roller---wire roller (DL series), ceramic roller (NT-2 series)the wire jump preventer (NT series). Two nylon sidewalls have been put to the both side of the ceramic ringthe bearing, it combines one wire roller. Two ceramic sidewalls have been put to the both side of the ceramic ringbearing, there is a reverse hooka ball to prevent the thread jumping out above the ring. The roller which is without the ceramic sidewalls is called ceramic roller.