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補(bu)(bu)償(chang)(chang)器(qi)(qi)習慣上也叫膨脹節,或(huo)(huo)伸(shen)縮(suo)節。由構(gou)(gou)成(cheng)其(qi)工作主(zhu)體的波(bo)紋管(guan)(guan)(guan)(一種(zhong)彈性元件(jian))和(he)(he)端管(guan)(guan)(guan)、支架、法蘭、導(dao)(dao)管(guan)(guan)(guan)等(deng)附件(jian)組成(cheng)。 屬于一種(zhong)補(bu)(bu)償(chang)(chang)元件(jian)。利用(yong)其(qi)工作主(zhu)體波(bo)紋管(guan)(guan)(guan)的有效伸(shen)縮(suo)變形(xing),以吸收管(guan)(guan)(guan)線(xian)(xian)、導(dao)(dao)管(guan)(guan)(guan)、容器(qi)(qi)等(deng)由熱(re)脹冷(leng)縮(suo)等(deng)原因而(er)(er)產生的尺(chi)寸(cun)變化,或(huo)(huo)補(bu)(bu)償(chang)(chang)管(guan)(guan)(guan)線(xian)(xian)、導(dao)(dao)管(guan)(guan)(guan)、容器(qi)(qi)等(deng)的軸(zhou)向、橫向和(he)(he)角向位移。也可(ke)用(yong)于降噪減(jian)振。在現代工業(ye)中(zhong)用(yong)途廣泛(fan)。供(gong)熱(re)上,為了防(fang)止(zhi)供(gong)熱(re)管(guan)(guan)(guan)道升溫時,由于熱(re)伸(shen)長(chang)或(huo)(huo)溫度(du)應(ying)力而(er)(er)引起管(guan)(guan)(guan)道變形(xing)或(huo)(huo)破(po)壞,需要在管(guan)(guan)(guan)道上設置(zhi)補(bu)(bu)償(chang)(chang)器(qi)(qi),以補(bu)(bu)償(chang)(chang)管(guan)(guan)(guan)道的熱(re)伸(shen)長(chang),從而(er)(er)減(jian)小管(guan)(guan)(guan)壁的應(ying)力和(he)(he)作用(yong)在閥件(jian)或(huo)(huo)支架結構(gou)(gou)上的作用(yong)力。