屋頂風機是安裝在屋頂上進行排風換氣的,由于安裝使用環境的特殊性,決定了風機使用材質和結構的特殊。 屋頂風機設置停機(ji)(ji)后防止空氣倒流的(de)(de)裝(zhuang)置,因為(wei)在(zai)(zai)熱壓作(zuo)用(yong)下(xia)風(feng)(feng)(feng)(feng)機(ji)(ji)高速旋轉(zhuan),造成風(feng)(feng)(feng)(feng)筒內(nei)風(feng)(feng)(feng)(feng)速增大很多(duo),風(feng)(feng)(feng)(feng)機(ji)(ji)倒轉(zhuan)對電機(ji)(ji)的(de)(de)啟(qi)動(dong)很不(bu)利,可能(neng)因啟(qi)動(dong)電流過大而損(sun)壞(huai)。屋頂(ding)風(feng)(feng)(feng)(feng)機(ji)(ji)在(zai)(zai)設計(ji)時應該(gai)具有可靠的(de)(de)防雨(yu)、防飛(fei)雪(xue)、防風(feng)(feng)(feng)(feng)沙的(de)(de)性能(neng),風(feng)(feng)(feng)(feng)雪(xue)和風(feng)(feng)(feng)(feng)沙不(bu)像雨(yu)水那(nei)樣,因為(wei)飛(fei)雪(xue)和風(feng)(feng)(feng)(feng)沙不(bu)僅會從上(shang)部(bu)進(jin)入(ru)風(feng)(feng)(feng)(feng)機(ji)(ji),在(zai)(zai)室外風(feng)(feng)(feng)(feng)速達到一(yi)定強度下(xia),還可能(neng)從下(xia)部(bu)進(jin)入(ru)風(feng)(feng)(feng)(feng)機(ji)(ji)。
屋(wu)頂(ding)(ding)(ding)(ding)風機安(an)裝(zhuang)的(de)基礎須(xu)高出屋(wu)面(mian),表面(mian)要(yao)(yao)求平整,以(yi)防(fang)(fang)滲(shen)水(shui)漏水(shui),并須(xu)預埋(mai)好地(di)腳螺栓(shuan)。2、風機底座與基礎之間加墊(dian)一層5mm橡(xiang)膠(jiao)板,以(yi)減少(shao)振動,地(di)腳螺栓(shuan)應配有彈簧(huang)墊(dian)圈(quan),防(fang)(fang)止使用時松動。3、屋(wu)頂(ding)(ding)(ding)(ding)風機出口的(de)管(guan)(guan)(guan)徑只能變大、不能變小,最(zui)后出風口要(yao)(yao)安(an)裝(zhuang)防(fang)(fang)蟲網,偏向上出風時須(xu)增加風雨帽;如遇冬季下雪(xue),冰(bing)凍日期,必須(xu)經常開(kai)動,以(yi)防(fang)(fang)大雪(xue)堵塞風機出口。4、屋(wu)頂(ding)(ding)(ding)(ding)風機與風管(guan)(guan)(guan)采用軟管(guan)(guan)(guan)(柔性(xing)材料且(qie)不燃燒)連(lian)接,長度(du)不宜(yi)小于(yu)200mm、管(guan)(guan)(guan)徑與屋(wu)頂(ding)(ding)(ding)(ding)風機進出口尺(chi)寸(cun)相同。為(wei)保證(zheng)軟管(guan)(guan)(guan)在系統(tong)運轉過程中不出現扭曲變形,應安(an)裝(zhuang)的(de)松緊(jin)適(shi)度(du)。對于(yu)裝(zhuang)在屋(wu)頂(ding)(ding)(ding)(ding)風機吸入端(duan)的(de)帆布(bu)軟管(guan)(guan)(guan),可安(an)裝(zhuang)稍(shao)緊(jin)些(xie),防(fang)(fang)止屋(wu)頂(ding)(ding)(ding)(ding)風機運轉時被吸入,減少(shao)帆布(bu)軟管(guan)(guan)(guan)的(de)截面(mian)尺(chi)寸(cun)
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德州凱億網宣辦:徐 20200725
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