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 Londonfl jerseys supplyn 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 swomen nfl jerseystaying 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, "yecheap nfl jerseys wholesales," 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 http://govoriotkrito.bg/libs/nflcn08.htmthe 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.cheap nfl jerseys
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交流接觸器吸合不正常怎么處理

2014/8/9 14:24:05      點擊:

交流接觸器吸合不正常是指交流接觸器吸合過于緩慢,觸頭不能完全閉合,鐵芯發出異常噪聲等不正常現象。交流接觸器吸合不正常的原因及處理辦法如下:

  1、由于控制回路的電源電壓低于85%額定電壓,電磁線圈通電后產生的電磁力小,不能將動鐵芯迅速吸向靜鐵芯,造成接觸器吸合緩慢或吸合不緊,此時應將控制回路的電源電壓調整到額定工作電壓。

  2、彈簧壓力不足,造成接觸器吸合不正常;彈簧的反作用力過大,造成吸合緩慢;觸頭彈簧壓力超程過大,使鐵芯不能完全閉合;觸頭的彈簧壓力與釋放壓力過大,造成觸頭不能完全閉合。處理的辦法是適當調整彈簧壓力,必要時更換彈簧。

  3、由于動靜鐵芯間的間隙過大,可動部分卡住、轉軸生銹或變形,造成接觸器吸合不正常。處理時可拆下動靜鐵芯進行檢查,調小間隙,清洗轉軸和支承桿,必要時更換配件。

  4、由于長期頻繁碰撞,鐵芯板面不平整,并沿疊片厚度方向向外擴張,此時可用銼刀修整,必要時更換鐵芯。

  5、短路環斷裂,造成鐵芯發出異常聲響。在這種情況下,應換上同樣尺寸的短路環。

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