Mike Krzyzewski is really a famous coach of Dream Team. She has coached north america men's basketball team for some time, that's clinched numerous medals for his country. Following London Olympic was over, Krzyzewski told The Associated Press that this game will be his final one as national coach, a job he's held for seven years. He had left open the possibility of staying with the team beyond the London Games, when practice on Saturday said these will be his last Olympics.When asked if he was sure, Krzyzewski didn't hesitate before again saying, "yes," this will be his last game "If we could win it, then it might be three major championships in a row, i always do not know when that has been done because we haven't usually won the globe championships," Krzyzewski said. "It becomes an enormous thing for the program." Whatever, he's an awesome coach. His achievement are going to be remembered by the country.
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交流接触器吸合不正常怎么处理

2014/8/9 14:24:05      点击:

吸合不正常是指交流接触器吸合过于缓慢,触头不能完全闭合,铁芯发出异常噪声等不正常现象。交流接触器吸合不正常的原因及处理办法如下:

  1、由于控制回路的电源电压低于85%额定电压,电磁线圈通电后产生的电磁力小,不能将动铁芯迅速吸向静铁芯,造成接触器吸合缓慢或吸合不紧,此时应将控制回路的电源电压调整到额定工作电压。

  2、弹簧压力不足,造成接触器吸合不正常;弹簧的反作用力过大,造成吸合缓慢;触头弹簧压力超程过大,使铁芯不能完全闭合;触头的弹簧压力与释放压力过大,造成触头不能完全闭合。处理的办法是适当调整弹簧压力,必要时更换弹簧。

  3、由于动静铁芯间的间隙过大,可动部分卡住、转轴生锈或变形,造成接触器吸合不正常。处理时可拆下动静铁芯进行检查,调小间隙,清洗转轴和支承杆,必要时更换配件。

  4、由于长期频繁碰撞,铁芯板面不平整,并沿叠片厚度方向向外扩张,此时可用锉刀修整,必要时更换铁芯。

  5、短路环断裂,造成铁芯发出异常声响。在这种情况下,应换上同样尺寸的短路环。