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補(bu)償(chang)(chang)器(qi)習(xi)慣上(shang)(shang)也叫膨脹節(jie),或伸縮(suo)節(jie)。由構成(cheng)其(qi)工作(zuo)(zuo)主體(ti)的(de)(de)波紋管(guan)(guan)(guan)(一種彈性元件(jian))和(he)端管(guan)(guan)(guan)、支(zhi)架、法蘭、導管(guan)(guan)(guan)等附件(jian)組成(cheng)。 屬(shu)于(yu)一種補(bu)償(chang)(chang)元件(jian)。利(li)用(yong)(yong)其(qi)工作(zuo)(zuo)主體(ti)波紋管(guan)(guan)(guan)的(de)(de)有效伸縮(suo)變(bian)形,以(yi)吸收管(guan)(guan)(guan)線、導管(guan)(guan)(guan)、容(rong)器(qi)等由熱脹冷縮(suo)等原因而(er)產生的(de)(de)尺寸變(bian)化,或補(bu)償(chang)(chang)管(guan)(guan)(guan)線、導管(guan)(guan)(guan)、容(rong)器(qi)等的(de)(de)軸向、橫(heng)向和(he)角向位移。也可(ke)用(yong)(yong)于(yu)降噪減振。在現代工業中(zhong)用(yong)(yong)途廣泛。供(gong)熱上(shang)(shang),為了防止供(gong)熱管(guan)(guan)(guan)道升溫時,由于(yu)熱伸長或溫度應力(li)(li)而(er)引起管(guan)(guan)(guan)道變(bian)形或破(po)壞,需要(yao)在管(guan)(guan)(guan)道上(shang)(shang)設置補(bu)償(chang)(chang)器(qi),以(yi)補(bu)償(chang)(chang)管(guan)(guan)(guan)道的(de)(de)熱伸長,從而(er)減小管(guan)(guan)(guan)壁(bi)的(de)(de)應力(li)(li)和(he)作(zuo)(zuo)用(yong)(yong)在閥件(jian)或支(zhi)架結構上(shang)(shang)的(de)(de)作(zuo)(zuo)用(yong)(yong)力(li)(li)。