金(jin)屬軟(ruan)(ruan)管(guan)(guan)(guan)(guan)(guan)主要由柔性(xing)體(波(bo)紋(wen)管(guan)(guan)(guan)(guan)(guan))、網(wang)(wang)體和(he)各類(lei)不同形(xing)式的(de)(de)(de)接(jie)頭(tou)組(zu)成。金(jin)屬軟(ruan)(ruan)管(guan)(guan)(guan)(guan)(guan)的(de)(de)(de)內管(guan)(guan)(guan)(guan)(guan)是螺旋形(xing)或(huo)(huo)環(huan)形(xing)薄壁(bi)不銹鋼波(bo)紋(wen)管(guan)(guan)(guan)(guan)(guan),其外層網(wang)(wang)套由不銹鋼絲或(huo)(huo)鋼帶(dai)按一定(ding)的(de)(de)(de)參數編(bian)織(zhi)而成。金(jin)屬軟(ruan)(ruan)管(guan)(guan)(guan)(guan)(guan)兩端(duan)接(jie)頭(tou)或(huo)(huo)法(fa)蘭是根(gen)據(ju)用戶管(guan)(guan)(guan)(guan)(guan)道(dao)的(de)(de)(de)接(jie)頭(tou)或(huo)(huo)法(fa)蘭相配的(de)(de)(de)。金(jin)屬軟(ruan)(ruan)管(guan)(guan)(guan)(guan)(guan)的(de)(de)(de)波(bo)紋(wen)管(guan)(guan)(guan)(guan)(guan)是由極(ji)薄的(de)(de)(de)無(wu)縫或(huo)(huo)縱焊縫不銹鋼薄壁(bi)管(guan)(guan)(guan)(guan)(guan)經高精(jing)度(du)塑性(xing)變型加工(gong)形(xing)成,波(bo)紋(wen)管(guan)(guan)(guan)(guan)(guan)輪廓的(de)(de)(de)彈(dan)性(xing)特性(xing)決(jue)定(ding)了軟(ruan)(ruan)管(guan)(guan)(guan)(guan)(guan)的(de)(de)(de)柔性(xing)和(he)抗(kang)疲勞(lao)性(xing),金(jin)屬軟(ruan)(ruan)管(guan)(guan)(guan)(guan)(guan)易吸收各種(zhong)運(yun)動變形(xing)和(he)循(xun)環(huan)載荷(he),尤其能夠(gou)滿足系(xi)統需較(jiao)大位移的(de)(de)(de)補償,對管(guan)(guan)(guan)(guan)(guan)道(dao)系(xi)統的(de)(de)(de)運(yun)動 , 熱膨脹吸收、振動吸收起著重要作用。
彈性元(yuan)件下作時有兩種狀態金屬軟管;一種是(shi)在一定的(de)載(zai)荷和位移情況(kuang)下工作,并保持載(zai)荷、位移始終不變(bian)或很少變(bian)化,
稱為靜態工(gong)作(zuo);另一種使用情況是載荷和位移(yi)不斷周期往(wang)復交替(ti)變(bian)化.元(yuan)件(jian)(jian)處于(yu)循環工(gong)作(zuo)狀態。由于(yu)工(gong)作(zuo)狀態的不同,元(yuan)件(jian)(jian)損壞
或失效的(de)模式(shi)也不同。儀表彈性敏感元(yuan)件工作在彈性范(fan)圍內,基本上處于靜(jing)態(tai)工作狀(zhuang)態(tai),使用壽命很長,高壓膠管一(yi)般達到數萬
次(ci)到數十萬次(ci)。工程(cheng)中應(ying)(ying)用的(de)波紋管類組(zu)件(jian),有時(shi)工作在彈塑性范圍(wei)或(huo)交變應(ying)(ying)力狀態(tai),壽命只有成百上干(gan)次(ci)。元件(jian)在循環工作時(shi)
必須給定(ding)許用工(gong)作壽命,規定(ding)循(xun)環次數、時(shi)間和頻率。
彈性元(yuan)(yuan)件的額定壽命是(shi)元(yuan)(yuan)件設計時定出的預期使用壽命,要求在(zai)這段(duan)期間內元(yuan)(yuan)件不(bu)允許(xu)出現疲(pi)勞、損壞或失效等現象。