補(bu)償(chang)器習慣上(shang)也叫膨(peng)脹節(jie)，或(huo)伸(shen)縮節(jie)。由(you)構(gou)成(cheng)(cheng)其工(gong)作主體(ti)的(de)波紋管(guan)(guan)(guan)(guan)(guan)(guan)（一種(zhong)彈(dan)性元(yuan)件(jian)）和端(duan)管(guan)(guan)(guan)(guan)(guan)(guan)、支架、法蘭、導管(guan)(guan)(guan)(guan)(guan)(guan)等附件(jian)組成(cheng)(cheng)。 屬于一種(zhong)補(bu)償(chang)元(yuan)件(jian)。利用其工(gong)作主體(ti)波紋管(guan)(guan)(guan)(guan)(guan)(guan)的(de)有效(xiao)伸(shen)縮變(bian)形，以(yi)吸收管(guan)(guan)(guan)(guan)(guan)(guan)線(xian)、導管(guan)(guan)(guan)(guan)(guan)(guan)、容(rong)器等由(you)熱(re)脹冷(leng)縮等原因而產生的(de)尺(chi)寸變(bian)化，或(huo)補(bu)償(chang)管(guan)(guan)(guan)(guan)(guan)(guan)線(xian)、導管(guan)(guan)(guan)(guan)(guan)(guan)、容(rong)器等的(de)軸向(xiang)、橫(heng)向(xiang)和角向(xiang)位移(yi)。也可用于降噪減(jian)振。在現代工(gong)業中(zhong)用途廣(guang)泛。供熱(re)上(shang)，為了防止供熱(re)管(guan)(guan)(guan)(guan)(guan)(guan)道升溫(wen)時，由(you)于熱(re)伸(shen)長或(huo)溫(wen)度(du)應力而引起管(guan)(guan)(guan)(guan)(guan)(guan)道變(bian)形或(huo)破壞(huai)，需要在管(guan)(guan)(guan)(guan)(guan)(guan)道上(shang)設(she)置(zhi)補(bu)償(chang)器，以(yi)補(bu)償(chang)管(guan)(guan)(guan)(guan)(guan)(guan)道的(de)熱(re)伸(shen)長，從而減(jian)小管(guan)(guan)(guan)(guan)(guan)(guan)壁的(de)應力和作用在閥件(jian)或(huo)支架結構(gou)上(shang)的(de)作用力。