Ω形鋼波紋涵管均勻半(ban)徑的極限偏差應(ying)(ying)為(wei)鋼(gang)(gang)波(bo)(bo)紋(wen)(wen)涵(han)(han)(han)(han)管(guan)(guan)(guan)名(ming)義(yi)均勻半(ban)徑的±15%,圓度公(gong)差應(ying)(ying)為(wei)鋼(gang)(gang)波(bo)(bo)紋(wen)(wen)涵(han)(han)(han)(han)管(guan)(guan)(guan)名(ming)義(yi)均勻半(ban)徑15%。若要求對(dui)鋼(gang)(gang)波(bo)(bo)紋(wen)(wen)涵(han)(han)(han)(han)管(guan)(guan)(guan)進行熱處理(li)(li),應(ying)(ying)按有關材料尺度或(huo)圖(tu)樣劃(hua)定的熱處理(li)(li)軌制進行,熱處理(li)(li)后的鋼(gang)(gang)波(bo)(bo)紋(wen)(wen)涵(han)(han)(han)(han)管(guan)(guan)(guan)應(ying)(ying)進行酸洗、鈍(dun)化處理(li)(li)。鋼(gang)(gang)波(bo)(bo)紋(wen)(wen)涵(han)(han)(han)(han)管(guan)(guan)(guan)可分為(wei)有外(wai)波(bo)(bo)紋(wen)(wen)和無外(wai)波(bo)(bo)紋(wen)(wen)兩種(zhong)。對(dui)于不(bu)同的鋼(gang)(gang)波(bo)(bo)紋(wen)(wen)涵(han)(han)(han)(han)管(guan)(guan)(guan)的計算(suan)也是(shi)不(bu)一樣的。由(you)外(wai)圓弧波(bo)(bo)紋(wen)(wen)膜(mo)片(pian)對(dui)壓力(li)有線性特性,所(suo)以得到(dao)的外(wai)圓弧波(bo)(bo)紋(wen)(wen)末膜(mo)片(pian)的計算(suan)結果(guo),還能用于膜(mo)片(pian)受(shou)力(li)變形較大的情(qing)況。
鋼波紋涵管的幾何外形和產業中所采用的成形方法是多種多樣的
由位移產(chan)生(sheng)的(de)鋼波紋涵(han)管(guan)軸向彈力(即剛度)是設計中應當考慮(lv)的(de)重要因(yin)素(su).使波紋、壁(bi)薄的(de)鋼波紋涵(han)管(guan)產(chan)生(sheng)位移比使波淺(qian)、壁(bi)厚的(de)鋼波紋涵(han)管(guan)所需的(de)力要小。
②確定(ding)波(bo)紋(wen)(wen)管(guan)(guan)(guan)層(ceng)(ceng)數(shu)根據波(bo)紋(wen)(wen)管(guan)(guan)(guan)的用(yong)途、工(gong)作(zuo)(zuo)壓(ya)力(li)、剛度(du)、工(gong)作(zuo)(zuo)介質等(deng)(deng)因(yin)素確定(ding)波(bo)紋(wen)(wen)管(guan)(guan)(guan)的層(ceng)(ceng)數(shu)。由分析不(bu)同的剛度(du)計算公(gong)(gong)式知道(dao),在總(zong)壁后相(xiang)等(deng)(deng)的前提下,多(duo)(duo)(duo)層(ceng)(ceng)波(bo)紋(wen)(wen)管(guan)(guan)(guan)的剛度(du)只是單(dan)層(ceng)(ceng)波(bo)紋(wen)(wen)管(guan)(guan)(guan)剛度(du)的1/z1.5或1/z2。因(yin)此多(duo)(duo)(duo)層(ceng)(ceng)波(bo)紋(wen)(wen)管(guan)(guan)(guan)具有(you)變(bian)形(xing)應力(li)小,使(shi)用(yong)壽(shou)命長(chang)等(deng)(deng)很多(duo)(duo)(duo)長(chang)處(chu)。在工(gong)作(zuo)(zuo)壓(ya)力(li)較高(gao)的情況下,一般選用(yong)多(duo)(duo)(duo)層(ceng)(ceng)結構的波(bo)紋(wen)(wen)管(guan)(guan)(guan),對于多(duo)(duo)(duo)層(ceng)(ceng)波(bo)紋(wen)(wen)管(guan)(guan)(guan)需要公(gong)(gong)道(dao)選擇其層(ceng)(ceng)數(shu)和單(dan)層(ceng)(ceng)單(dan)厚。
確定結構型式貴州鋼(gang)波(bo)紋涵管分享波(bo)紋管的計(ji)算公式!①選擇波(bo)紋管外形(xing)根(gen)據波(bo)紋管的用(yong)途、機(ji)能、使用(yong)要求以及各種波(bo)形(xing)的機(ji)能和制造(zao)特點等(deng)因素來選擇比較(jiao)公道的波(bo)紋外形(xing)。在(zai)一般情況下,多數選擇U型波(bo)紋等(deng)。
關于波(bo)紋管(guan)的(de)(de)材料選擇(ze)(ze)根據波(bo)紋管(guan)的(de)(de)用(yong)途(tu)、荷載種類(lei)和大小、精度(du)要求、工作介質、工作溫度(du)及使用(yong)壽命(ming)等已知前提,并考慮(lv)材料的(de)(de)成形和焊接工藝性。選擇(ze)(ze)一種合適的(de)(de)材料。材料選擇(ze)(ze)還要考慮(lv)其市場來源。
現在根據系統給(gei)定的(de)已知前(qian)(qian)提(ti)選擇波紋管的(de)材料、結(jie)構型(xing)式、幾(ji)何(he)尺寸參(can)數(shu)和機能參(can)數(shu)。在選型(xing)過(guo)程(cheng)中應當(dang)全面知足系統對波紋管的(de)使用要(yao)(yao)求,并(bing)力(li)求做(zuo)到結(jie)構提(ti)高前(qian)(qian)輩公(gong)道,在有(you)前(qian)(qian)提(ti)的(de)情況下更好(hao)進(jin)行優(you)化設計。實踐證實,波紋管的(de)設計選型(xing)非(fei)常重要(yao)(yao)的(de),假如(ru)設計選型(xing)不公(gong)道,波紋管制造的(de)質量再高也(ye)知足不了使用要(yao)(yao)求。
本尺度還給出了Ω形鋼波紋涵管的(de)設計公式。它與"u"形(xing)鋼(gang)波(bo)(bo)(bo)紋(wen)(wen)涵(han)管比擬承受(shou)的(de)軸向(xiang)位移(yi)較小,但能(neng)(neng)承受(shou)較高的(de)內(nei)壓力(li),該尺度(du)(du)以(yi)為使膨脹節既(ji)能(neng)(neng)承受(shou)高壓力(li)又能(neng)(neng)經受(shou)大位移(yi)的(de)方法,就是在“u”形(xing)鋼(gang)波(bo)(bo)(bo)紋(wen)(wen)涵(han)管的(de)外部(bu)安(an)設加強環:采用多(duo)層結構或增(zeng)加鋼(gang)波(bo)(bo)(bo)紋(wen)(wen)涵(han)管的(de)厚度(du)(du)也可以(yi)進步(bu)鋼(gang)波(bo)(bo)(bo)紋(wen)(wen)涵(han)管的(de)承壓能(neng)(neng)力(li),但增(zeng)加厚度(du)(du)會明(ming)顯地(di)降低鋼(gang)波(bo)(bo)(bo)紋(wen)(wen)涵(han)管的(de)疲憊壽(shou)命(ming)。疲憊壽(shou)命(ming)是位移(yi)和內(nei)壓的(de)函數
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