補(bu)償器(qi)習(xi)慣上(shang)也(ye)叫膨(peng)脹(zhang)節(jie)，或(huo)伸(shen)縮(suo)節(jie)。由(you)(you)構成其(qi)工(gong)(gong)作(zuo)主(zhu)體的(de)波紋(wen)管(guan)(guan)(guan)(guan)（一種(zhong)彈性元件(jian)）和端管(guan)(guan)(guan)(guan)、支(zhi)(zhi)架、法蘭、導(dao)管(guan)(guan)(guan)(guan)等附(fu)件(jian)組(zu)成。 屬于一種(zhong)補(bu)償元件(jian)。利用其(qi)工(gong)(gong)作(zuo)主(zhu)體波紋(wen)管(guan)(guan)(guan)(guan)的(de)有效伸(shen)縮(suo)變(bian)形(xing)(xing)，以吸收(shou)管(guan)(guan)(guan)(guan)線、導(dao)管(guan)(guan)(guan)(guan)、容器(qi)等由(you)(you)熱脹(zhang)冷縮(suo)等原因(yin)而(er)產(chan)生的(de)尺(chi)寸(cun)變(bian)化，或(huo)補(bu)償管(guan)(guan)(guan)(guan)線、導(dao)管(guan)(guan)(guan)(guan)、容器(qi)等的(de)軸向、橫向和角向位(wei)移。也(ye)可用于降噪(zao)減振。在現代工(gong)(gong)業中用途廣泛。供(gong)熱上(shang)，為了防止供(gong)熱管(guan)(guan)(guan)(guan)道(dao)(dao)(dao)升溫(wen)時(shi)，由(you)(you)于熱伸(shen)長(chang)或(huo)溫(wen)度應(ying)力(li)而(er)引起(qi)管(guan)(guan)(guan)(guan)道(dao)(dao)(dao)變(bian)形(xing)(xing)或(huo)破壞，需要在管(guan)(guan)(guan)(guan)道(dao)(dao)(dao)上(shang)設(she)置(zhi)補(bu)償器(qi)，以補(bu)償管(guan)(guan)(guan)(guan)道(dao)(dao)(dao)的(de)熱伸(shen)長(chang)，從(cong)而(er)減小管(guan)(guan)(guan)(guan)壁的(de)應(ying)力(li)和作(zuo)用在閥(fa)件(jian)或(huo)支(zhi)(zhi)架結構上(shang)的(de)作(zuo)用力(li)。