波紋補償器
不銹鋼波紋補償器
球形補償器
旋轉補償器
套筒補償器
波紋補償(chang)器(qi)是用以利用波紋補償(chang)器(qi)的彈性元件(jian)的有效(xiao)伸縮變形來吸收(shou)管線、導管或容器(qi)由熱(re)脹冷縮等原因而(er)產生(sheng)的尺寸變化的一(yi)種補償(chang)裝置,屬于一(yi)種補償(chang)元件(jian)。可(ke)對(dui)軸向(xiang),橫(heng)向(xiang),和角向(xiang)位移的的吸收(shou)。
由于不同(tong)類(lei)型(xing)的(de)波紋補(bu)償器補(bu)償形式(shi)不同(tong),主要(yao)有軸(zhou)(zhou)(zhou)向(xiang)(xiang)、橫向(xiang)(xiang)、角向(xiang)(xiang)以及(ji)組合(he)補(bu)償方式(shi)。對同(tong)時存在(zai)多種(zhong)位(wei)(wei)移(yi)的(de)波紋補(bu)償器,要(yao)對其各(ge)種(zhong)位(wei)(wei)移(yi)進行合(he)成,求(qiu)出總(zong)(zong)等(deng)效(xiao)軸(zhou)(zhou)(zhou)向(xiang)(xiang)位(wei)(wei)移(yi),檢(jian)測(ce)是(shi)對總(zong)(zong)等(deng)效(xiao)軸(zhou)(zhou)(zhou)向(xiang)(xiang)位(wei)(wei)移(yi)而(er)言(yan)。也(ye)就是(shi)說(shuo),波紋補(bu)償器公稱位(wei)(wei)移(yi)的(de)檢(jian)測(ce)是(shi)對總(zong)(zong)等(deng)效(xiao)軸(zhou)(zhou)(zhou)向(xiang)(xiang)位(wei)(wei)移(yi)檢(jian)測(ce)。
通(tong)用(yong)類波(bo)(bo)紋(wen)(wen)管(guan)(guan)(guan)(guan)的公稱位(wei)(wei)(wei)(wei)移(yi)(yi),實際上就是波(bo)(bo)紋(wen)(wen)管(guan)(guan)(guan)(guan)給(gei)定(ding)的名義位(wei)(wei)(wei)(wei)移(yi)(yi)變形的能力。對于用(yong)波(bo)(bo)紋(wen)(wen)管(guan)(guan)(guan)(guan)制成的膨脹(zhang)節(補償(chang)器(qi))、補償(chang)器(qi)而言,通(tong)常稱為補償(chang)量,反映(ying)了波(bo)(bo)紋(wen)(wen)管(guan)(guan)(guan)(guan)吸收(shou)系統位(wei)(wei)(wei)(wei)移(yi)(yi)的能力,表示在一(yi)定(ding)條件(jian)下,產(chan)品(pin)所具有(you)的zui大(da)的補償(chang)能力。波(bo)(bo)紋(wen)(wen)管(guan)(guan)(guan)(guan)在正(zheng)(zheng)常工(gong)作時(shi)(shi)(shi),要吸收(shou)系統位(wei)(wei)(wei)(wei)移(yi)(yi)而產(chan)生位(wei)(wei)(wei)(wei)移(yi)(yi)變形,同時(shi)(shi)(shi)還要保證(zheng)一(yi)定(ding)次數的正(zheng)(zheng)常安(an)全(quan)工(gong)作位(wei)(wei)(wei)(wei)移(yi)(yi)循(xun)環(huan)次數。因此波(bo)(bo)紋(wen)(wen)管(guan)(guan)(guan)(guan)在設(she)計(ji)時(shi)(shi)(shi),根據每一(yi)個波(bo)(bo)可以(yi)承受(shou)的位(wei)(wei)(wei)(wei)移(yi)(yi)大(da)小,設(she)計(ji)有(you)一(yi)定(ding)的波(bo)(bo)紋(wen)(wen)數,當每個波(bo)(bo)都(dou)在均(jun)勻地承受(shou)位(wei)(wei)(wei)(wei)移(yi)(yi)載荷(he),沒有(you)局部超負荷(he)時(shi)(shi)(shi),波(bo)(bo)紋(wen)(wen)管(guan)(guan)(guan)(guan)可以(yi)正(zheng)(zheng)常的工(gong)作。設(she)計(ji)合(he)理時(shi)(shi)(shi),可以(yi)保證(zheng)一(yi)定(ding)的設(she)計(ji)工(gong)作位(wei)(wei)(wei)(wei)移(yi)(yi)循(xun)環(huan)壽命次數。在JB/T 6169-92“金屬波(bo)(bo)紋(wen)(wen)管(guan)(guan)(guan)(guan)”標準中,對此項性(xing)能的檢測(ce)做(zuo)出(chu)了規定(ding)。
△T為(wei)溫差(介質溫度-安裝(zhuang)時環(huan)境溫度)
失(shi)效(xiao)分析(xi)
生(sheng)產企業對(dui)波(bo)(bo)紋(wen)(wen)(wen)管(guan)(guan)補(bu)償(chang)(chang)器失(shi)(shi)(shi)(shi)效原因(yin)分析發現(xian),在運行期間的(de)失(shi)(shi)(shi)(shi)效主要表現(xian)為腐(fu)蝕(shi)(shi)(shi)泄漏和(he)(he)失(shi)(shi)(shi)(shi)穩(wen)(wen)變形(xing)兩種形(xing)式,其中(zhong)以腐(fu)蝕(shi)(shi)(shi)失(shi)(shi)(shi)(shi)效居多。從腐(fu)蝕(shi)(shi)(shi)失(shi)(shi)(shi)(shi)效波(bo)(bo)紋(wen)(wen)(wen)膨脹(zhang)節(補(bu)償(chang)(chang)器)的(de)解剖分析發現(xian),腐(fu)蝕(shi)(shi)(shi)失(shi)(shi)(shi)(shi)效通(tong)常(chang)分點(dian)腐(fu)蝕(shi)(shi)(shi)穿孔和(he)(he)應力腐(fu)蝕(shi)(shi)(shi)開裂,其中(zhong)氯離(li)子應力腐(fu)蝕(shi)(shi)(shi)開裂約(yue)占整個腐(fu)蝕(shi)(shi)(shi)失(shi)(shi)(shi)(shi)效的(de)95%。因(yin)此(ci),正(zheng)確(que)地選(xuan)擇波(bo)(bo)紋(wen)(wen)(wen)管(guan)(guan)制作材料(liao)和(he)(he)結構(gou)、合理設計(ji)(ji)波(bo)(bo)形(xing)參數和(he)(he)疲勞壽(shou)(shou)命(ming)(ming)、保(bao)證安裝質量等措(cuo)施,能大(da)大(da)提高(gao)波(bo)(bo)紋(wen)(wen)(wen)膨脹(zhang)節(補(bu)償(chang)(chang)器)的(de)安全可靠性(xing)。設計(ji)(ji)上,應該考慮(lv)補(bu)償(chang)(chang)器的(de)穩(wen)(wen)定性(xing),預(yu)防波(bo)(bo)紋(wen)(wen)(wen)管(guan)(guan)失(shi)(shi)(shi)(shi)穩(wen)(wen)。資料(liao)顯示,波(bo)(bo)紋(wen)(wen)(wen)管(guan)(guan)的(de)補(bu)償(chang)(chang)量取決于(yu)其疲勞壽(shou)(shou)命(ming)(ming),疲勞壽(shou)(shou)命(ming)(ming)越高(gao),波(bo)(bo)紋(wen)(wen)(wen)管(guan)(guan)單(dan)波(bo)(bo)補(bu)償(chang)(chang)量越小。當波(bo)(bo)紋(wen)(wen)(wen)管(guan)(guan)設計(ji)(ji)的(de)許用壽(shou)(shou)命(ming)(ming)較(jiao)低時(shi),不(bu)僅其子午向綜合應力較(jiao)高(gao),環向應力也比較(jiao)高(gao),使波(bo)(bo)紋(wen)(wen)(wen)管(guan)(guan)局部很(hen)快(kuai)進(jin)入塑性(xing)變形(xing),導致波(bo)(bo)紋(wen)(wen)(wen)管(guan)(guan)失(shi)(shi)(shi)(shi)穩(wen)(wen)引起(qi)失(shi)(shi)(shi)(shi)效。
標準(zhun)
2008-08-04發布,2009-02-01實施(shi)
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