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　　负压风机电机由组成部分：机身铝合金外壳、前后铸铁端盖、定子、转子、轴承、漆包线等这几大部件组成，每一个部件都起到关键作用。

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　　QIAN、HOUZHUTIEDUANGAI：QIAN、HOUDUANGAICAIYONGZHUTIECAIZHI，YIFANGMIANSHIWEILEZENGJIADIANJIYUNDONGGUOCHENGZHONGDEZHICHENGQIANGDU，ERSHIWEILERANGZHOUCHENGYUZHOUCHENGWEIZAISHOURESHIDEPENGZHANGZENGLIANGBAOCHIYIZHI，BIMIANYUNXINGSHIJIANZHANGLEZHOUCHENGJINGXIANGCHUANDONG。

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　　轴承：轴承是电机转动部件，它的精度、强度、硬度都影响着电机的使用状况及寿命。

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　　XUANZETONGFENGJIANGWENSHEBEIJIFUYAFENGJITONGFENGFANGSHI

　　1、ZIRANTONGFENGFANGSHI

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　　(1) 合理设计进风口和排风口。厂房自然通风时由于风压作用受自然条件限制，具有多变性,无风时即无风压作用，因此风压在一般情况下不宜作为厂房自然通风的动力考虑。当厂房建筑形式和散热量为一定时，合理的设计进、排气口，是提厂房自然通风效果的关键所在。厂房自然通风设计的原则应该是尽量设法降低中和面的位置。因为中和面的位置低，就意味着由室外进入厂房内的新鲜空气，绝大部分或全部都流经作业区范围，显然这对降低作业区温度、提作业区空气质量,即提自然通风效果，将起着决定性作用。由自然通风原理可知，当进、排气量为定值时，降低中和面位置的关键手段，就是合理协调进、排气口面积的比值。

　　(2) YINGJINLIANGBIMIANJINQIDUANLIUXIANXIANG。SUOWEIJINQIDUANLIU，XIZHIYOUJINQIKOUJINRUCHANGFANGNEIDEXINXIANKONGQI，ZAIWEIJINRUZUOYEQUFANWEIZHIQIAN，JIUYIJINGBEIJIAREERSHANGSHENGZHITIANCHUANGPAIQIKOUPAICHUSHIWAIDEXIANXIANG。XIANERYIJIAN，ZHEIYANGDEJINQI，MEIYOUQIDAOTIZUOYEQUKONGQIZHILIANGHEGAISHANZUOYEQUREHUANJINGDEZUOYONG。YINCI，WEITICHANGFANGZIRANTONGFENGXIAOGUO，YINGJINLIANGBIMIANZHEIZHONGJINQIDUANLIUDEXIANXIANG。ZAICHANGFANGLIYONGCECHUANGJINQISHI，JIHUIZAOCHENGJINQIDUANLIUXIANXIANG，SUOYIZAIYIBANQINGKUANGXIASHIYINGGAIJINLIANGBIMIANDE。ZAOCHENGCHANGFANGJINQIDUANLIUXIANXIANGDEYINSUYOUDUOZHONG，YINCIZAIJINXINGFUYAFENGJISHIYONGZHONG，YINGZIXIFENXI、DUIZHENGXIAYAO、CAIQUYOUXIAOCUOSHI，JINLIANGBIMIANCHUXIANZHEIZHONGXIANXIANG。

　　(3) 对多跨工厂房的自然通风，必须采取有效的措施。在大型企业中，有一些多跨厂房。这类厂房内不但有很大的散热量，而且是多跨，有的厂房宽度竟达150m以上。因此是厂房通风降温设计中的一大难题。由于厂房很宽，仅靠两侧外墙进气，不但进气口面积无法满足要求，而且进气深度也远远无法达到。对于厂房中部而言，无可避免地将形成全面进气短流。此种情况下，如果不采取有效措施，只是勉强通过自然通风计算求得天窗面积，再多的天窗也难以满足要求。必须广开

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