负压风机电机介绍选择通风降温设备及负压风机通风方式
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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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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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(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。
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(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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