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膨(peng)脹(zhang)(zhang)節(jie)習慣上(shang)(shang)(shang)也叫補償器,或伸(shen)縮節(jie)。由構成(cheng)其工作主體的(de)(de)(de)波紋(wen)(wen)管(guan)(guan)(guan)(guan)(一種(zhong)彈性元件)和端管(guan)(guan)(guan)(guan)、支(zhi)架、法(fa)蘭(lan)、導(dao)管(guan)(guan)(guan)(guan)等(deng)附件組成(cheng)。 膨(peng)脹(zhang)(zhang)節(jie)是為了補償因溫(wen)度差與機械振動(dong)引起(qi)的(de)(de)(de)附加應(ying)力,而(er)(er)設置在容器殼體或管(guan)(guan)(guan)(guan)道(dao)上(shang)(shang)(shang)的(de)(de)(de)一種(zhong)撓性結(jie)構。利用其工作主體波紋(wen)(wen)管(guan)(guan)(guan)(guan)的(de)(de)(de)有效伸(shen)縮變(bian)形,以吸收(shou)管(guan)(guan)(guan)(guan)線(xian)、導(dao)管(guan)(guan)(guan)(guan)、容器等(deng)由熱脹(zhang)(zhang)冷縮等(deng)原因而(er)(er)產生的(de)(de)(de)尺寸變(bian)化,或補償管(guan)(guan)(guan)(guan)線(xian)、導(dao)管(guan)(guan)(guan)(guan)、容器等(deng)的(de)(de)(de)軸(zhou)向、橫(heng)向和角向位移(yi)。也可用于(yu)降噪減(jian)振。供(gong)熱上(shang)(shang)(shang),為了防止供(gong)熱管(guan)(guan)(guan)(guan)道(dao)升溫(wen)時,由于(yu)熱伸(shen)長或溫(wen)度應(ying)力而(er)(er)引起(qi)管(guan)(guan)(guan)(guan)道(dao)變(bian)形或破壞,需要(yao)在管(guan)(guan)(guan)(guan)道(dao)上(shang)(shang)(shang)設置補償器,以補償管(guan)(guan)(guan)(guan)道(dao)的(de)(de)(de)熱伸(shen)長,從(cong)而(er)(er)減(jian)小管(guan)(guan)(guan)(guan)壁的(de)(de)(de)應(ying)力和作用在閥件或支(zhi)架結(jie)構上(shang)(shang)(shang)的(de)(de)(de)作用力。