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<p>As crucial connections of the equipment in the nuclear power plant, the reliability of the metal hoses has a significant influence on its safety and operational stability. However, the mutual wear between the bellows and the wire braid occurring in the metal hose incur potential risks under vibration load, which significantly compromise system reliability and service life. This study focuses on a specific type of metal hose and proposes a solution of covering the outer surface of the bellows with an aramid wear-resistant layer. Wear experiment indicate that the bellows with an aramid wear-resistant layer did not wear through after 650000 cycles of abrasion and the untreated bellows wear through after 10010 cycles. Finite element simulation show that after adding aramid wear-resistant layer, the wear resistance of metal hose is increased by 104 times. The untreated bellows shows obvious plough-like wear marks on the bellows surface and the bellows with an aramid wear-resistant layer shows no abnormalities such as wear-through or tearing on the wear-resistant layer after vibration experiment, which indicate that this solution not only effectively prevents mutual wear between the bellows and the wire braid but also ensures that the mechanical properties of the metal hose are maintained.</p>

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Design and wear protection research of metal hose based on aramid wear-resistant layer

  • 期刊论文

  • 发表日期：

    2025年9月19日

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  • Chunxiang Gan,
  • Shibo Zhang,
  • Xiaoyu Zheng,
  • Jianrun Zhang,
  • Xi Lu

摘要

As crucial connections of the equipment in the nuclear power plant, the reliability of the metal hoses has a significant influence on its safety and operational stability. However, the mutual wear between the bellows and the wire braid occurring in the metal hose incur potential risks under vibration load, which significantly compromise system reliability and service life. This study focuses on a specific type of metal hose and proposes a solution of covering the outer surface of the bellows with an aramid wear-resistant layer. Wear experiment indicate that the bellows with an aramid wear-resistant layer did not wear through after 650000 cycles of abrasion and the untreated bellows wear through after 10010 cycles. Finite element simulation show that after adding aramid wear-resistant layer, the wear resistance of metal hose is increased by 104 times. The untreated bellows shows obvious plough-like wear marks on the bellows surface and the bellows with an aramid wear-resistant layer shows no abnormalities such as wear-through or tearing on the wear-resistant layer after vibration experiment, which indicate that this solution not only effectively prevents mutual wear between the bellows and the wire braid but also ensures that the mechanical properties of the metal hose are maintained.