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膨(peng)脹(zhang)節習(xi)慣上(shang)(shang)(shang)也(ye)叫補(bu)償器(qi)(qi),或(huo)(huo)(huo)伸(shen)縮節。由構成(cheng)其工作(zuo)主體(ti)的(de)(de)波紋管(guan)(guan)(guan)(一種彈(dan)性(xing)(xing)元(yuan)件(jian)(jian))和端管(guan)(guan)(guan)、支(zhi)架、法蘭、導(dao)管(guan)(guan)(guan)等(deng)(deng)附件(jian)(jian)組成(cheng)。 膨(peng)脹(zhang)節是為(wei)(wei)了補(bu)償因(yin)溫(wen)度差與機(ji)械振動引起的(de)(de)附加(jia)應力,而(er)設(she)置(zhi)在(zai)容器(qi)(qi)殼(ke)體(ti)或(huo)(huo)(huo)管(guan)(guan)(guan)道(dao)(dao)上(shang)(shang)(shang)的(de)(de)一種撓性(xing)(xing)結(jie)構。利(li)用(yong)(yong)其工作(zuo)主體(ti)波紋管(guan)(guan)(guan)的(de)(de)有效伸(shen)縮變形(xing),以吸收管(guan)(guan)(guan)線(xian)(xian)、導(dao)管(guan)(guan)(guan)、容器(qi)(qi)等(deng)(deng)由熱脹(zhang)冷(leng)縮等(deng)(deng)原因(yin)而(er)產生的(de)(de)尺寸變化,或(huo)(huo)(huo)補(bu)償管(guan)(guan)(guan)線(xian)(xian)、導(dao)管(guan)(guan)(guan)、容器(qi)(qi)等(deng)(deng)的(de)(de)軸向(xiang)、橫(heng)向(xiang)和角向(xiang)位移。也(ye)可用(yong)(yong)于降噪減(jian)振。供熱上(shang)(shang)(shang),為(wei)(wei)了防止(zhi)供熱管(guan)(guan)(guan)道(dao)(dao)升溫(wen)時,由于熱伸(shen)長或(huo)(huo)(huo)溫(wen)度應力而(er)引起管(guan)(guan)(guan)道(dao)(dao)變形(xing)或(huo)(huo)(huo)破壞,需(xu)要在(zai)管(guan)(guan)(guan)道(dao)(dao)上(shang)(shang)(shang)設(she)置(zhi)補(bu)償器(qi)(qi),以補(bu)償管(guan)(guan)(guan)道(dao)(dao)的(de)(de)熱伸(shen)長,從而(er)減(jian)小管(guan)(guan)(guan)壁的(de)(de)應力和作(zuo)用(yong)(yong)在(zai)閥(fa)件(jian)(jian)或(huo)(huo)(huo)支(zhi)架結(jie)構上(shang)(shang)(shang)的(de)(de)作(zuo)用(yong)(yong)力。