膨(peng)脹節習(xi)慣上(shang)也叫補(bu)(bu)償器(qi),或(huo)(huo)(huo)伸(shen)縮節。由構成其工作(zuo)主體的(de)波(bo)紋(wen)(wen)管(guan)(guan)(guan)(guan)(guan)(一種彈(dan)性(xing)元件)和端(duan)管(guan)(guan)(guan)(guan)(guan)、支架、法蘭、導(dao)管(guan)(guan)(guan)(guan)(guan)等(deng)附件組成。 膨(peng)脹節是(shi)為(wei)(wei)了補(bu)(bu)償因溫度差與機械振動引起的(de)附加應力(li),而設(she)置在容器(qi)殼(ke)體或(huo)(huo)(huo)管(guan)(guan)(guan)(guan)(guan)道(dao)上(shang)的(de)一種撓性(xing)結(jie)構。利用其工作(zuo)主體波(bo)紋(wen)(wen)管(guan)(guan)(guan)(guan)(guan)的(de)有效伸(shen)縮變(bian)形(xing),以(yi)吸收(shou)管(guan)(guan)(guan)(guan)(guan)線(xian)、導(dao)管(guan)(guan)(guan)(guan)(guan)、容器(qi)等(deng)由熱(re)(re)(re)脹冷縮等(deng)原因而產生的(de)尺寸變(bian)化,或(huo)(huo)(huo)補(bu)(bu)償管(guan)(guan)(guan)(guan)(guan)線(xian)、導(dao)管(guan)(guan)(guan)(guan)(guan)、容器(qi)等(deng)的(de)軸(zhou)向、橫向和角向位移。也可(ke)用于(yu)降噪減(jian)振。供熱(re)(re)(re)上(shang),為(wei)(wei)了防止供熱(re)(re)(re)管(guan)(guan)(guan)(guan)(guan)道(dao)升(sheng)溫時,由于(yu)熱(re)(re)(re)伸(shen)長或(huo)(huo)(huo)溫度應力(li)而引起管(guan)(guan)(guan)(guan)(guan)道(dao)變(bian)形(xing)或(huo)(huo)(huo)破壞,需要在管(guan)(guan)(guan)(guan)(guan)道(dao)上(shang)設(she)置補(bu)(bu)償器(qi),以(yi)補(bu)(bu)償管(guan)(guan)(guan)(guan)(guan)道(dao)的(de)熱(re)(re)(re)伸(shen)長,從而減(jian)小管(guan)(guan)(guan)(guan)(guan)壁(bi)的(de)應力(li)和作(zuo)用在閥(fa)件或(huo)(huo)(huo)支架結(jie)構上(shang)的(de)作(zuo)用力(li)。