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膨脹節習(xi)慣上(shang)也叫(jiao)補(bu)(bu)償(chang)(chang)器,或伸(shen)(shen)縮節。由(you)(you)構(gou)(gou)成其工(gong)作主體(ti)(ti)的(de)(de)(de)波(bo)紋管(guan)(guan)(guan)(一種彈性(xing)元(yuan)件(jian)(jian))和(he)(he)端管(guan)(guan)(guan)、支架、法蘭(lan)、導(dao)管(guan)(guan)(guan)等(deng)附(fu)件(jian)(jian)組成。 膨脹節是為(wei)了(le)補(bu)(bu)償(chang)(chang)因溫度差與機(ji)械振動(dong)引起的(de)(de)(de)附(fu)加(jia)應力(li),而(er)(er)設置在容(rong)器殼體(ti)(ti)或管(guan)(guan)(guan)道(dao)上(shang)的(de)(de)(de)一種撓性(xing)結構(gou)(gou)。利用(yong)其工(gong)作主體(ti)(ti)波(bo)紋管(guan)(guan)(guan)的(de)(de)(de)有效伸(shen)(shen)縮變形,以吸收管(guan)(guan)(guan)線、導(dao)管(guan)(guan)(guan)、容(rong)器等(deng)由(you)(you)熱(re)(re)(re)脹冷縮等(deng)原因而(er)(er)產生的(de)(de)(de)尺寸變化,或補(bu)(bu)償(chang)(chang)管(guan)(guan)(guan)線、導(dao)管(guan)(guan)(guan)、容(rong)器等(deng)的(de)(de)(de)軸向、橫向和(he)(he)角(jiao)向位移。也可(ke)用(yong)于降(jiang)噪減振。供熱(re)(re)(re)上(shang),為(wei)了(le)防止供熱(re)(re)(re)管(guan)(guan)(guan)道(dao)升(sheng)溫時,由(you)(you)于熱(re)(re)(re)伸(shen)(shen)長(chang)或溫度應力(li)而(er)(er)引起管(guan)(guan)(guan)道(dao)變形或破(po)壞,需要在管(guan)(guan)(guan)道(dao)上(shang)設置補(bu)(bu)償(chang)(chang)器,以補(bu)(bu)償(chang)(chang)管(guan)(guan)(guan)道(dao)的(de)(de)(de)熱(re)(re)(re)伸(shen)(shen)長(chang),從而(er)(er)減小(xiao)管(guan)(guan)(guan)壁的(de)(de)(de)應力(li)和(he)(he)作用(yong)在閥件(jian)(jian)或支架結構(gou)(gou)上(shang)的(de)(de)(de)作用(yong)力(li)。