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補(bu)(bu)償(chang)(chang)(chang)器習慣上(shang)也(ye)叫膨脹(zhang)節,或(huo)伸縮節。由構(gou)成其(qi)工作(zuo)主(zhu)體的波紋管(guan)(guan)(guan)(guan)(一(yi)種彈性元件(jian))和端管(guan)(guan)(guan)(guan)、支架(jia)、法蘭(lan)、導管(guan)(guan)(guan)(guan)等(deng)附件(jian)組(zu)成。 屬于一(yi)種補(bu)(bu)償(chang)(chang)(chang)元件(jian)。利(li)用(yong)其(qi)工作(zuo)主(zhu)體波紋管(guan)(guan)(guan)(guan)的有效伸縮變(bian)形,以吸收(shou)管(guan)(guan)(guan)(guan)線、導管(guan)(guan)(guan)(guan)、容器等(deng)由熱(re)(re)(re)脹(zhang)冷縮等(deng)原因而(er)產生(sheng)的尺寸變(bian)化,或(huo)補(bu)(bu)償(chang)(chang)(chang)管(guan)(guan)(guan)(guan)線、導管(guan)(guan)(guan)(guan)、容器等(deng)的軸向、橫向和角向位(wei)移。也(ye)可用(yong)于降噪減振(zhen)。在(zai)現代工業中用(yong)途(tu)廣泛(fan)。供熱(re)(re)(re)上(shang),為了防止供熱(re)(re)(re)管(guan)(guan)(guan)(guan)道(dao)升溫(wen)時,由于熱(re)(re)(re)伸長或(huo)溫(wen)度應力而(er)引起管(guan)(guan)(guan)(guan)道(dao)變(bian)形或(huo)破壞,需要在(zai)管(guan)(guan)(guan)(guan)道(dao)上(shang)設置補(bu)(bu)償(chang)(chang)(chang)器,以補(bu)(bu)償(chang)(chang)(chang)管(guan)(guan)(guan)(guan)道(dao)的熱(re)(re)(re)伸長,從而(er)減小(xiao)管(guan)(guan)(guan)(guan)壁的應力和作(zuo)用(yong)在(zai)閥件(jian)或(huo)支架(jia)結構(gou)上(shang)的作(zuo)用(yong)力。