遠心ポンプで生じるキャビテーションエロージョンとその対策

DOI Web Site

書誌事項

タイトル別名
  • Centrifugal Pump Cavitation Erosion and Its Countermeasures
  • エンシン ポンプ デ ショウジル キャビテーションエロージョン ト ソノ タイサク

この論文をさがす

説明

<p>This article explains the cavitation erosion of centrifugal pumps and its countermeasure technology. The principle of cavitation generation is water vaporization when its pressure drops below the saturated vapor pressure. In a fluid machine, cavitation occurs when the pressure drops at a point where the flow velocity increases and becomes below the saturated vapor pressure. Bubbles generated by cavitation collapse at the place where the pressure of the fluid recovers, and an impact force of several MPa to GPa acts on the material surface due to the underwater shock wave and microjet generated at the time of the collapse. Cavitation erosion is a phenomenon in which the surface of a material is spongy-like damaged by repeated bubble collapse, and is a very serious problem that causes through-holes and breakage of the machine parts. This article proposes three countermeasures against cavitation erosion of centrifugal pumps. The first is to keep the erosion stage in the incubation period for as long as possible, which can be realized by suppressing the occurrence of cavitation itself. The second is a method of reducing the erosion rate, which can be achieved by replacing the member with a material that is less eroded based on the quantified erosion resistance value of the material. The third method is a repair / shape restoration method for the part where cavitation erosion has occurred, and is a countermeasure for cases where the cavitation erosion problem cannot be solved even with the above two methods.</p>

収録刊行物

  • トライボロジスト

    トライボロジスト 66 (12), 881-886, 2021-12-15

    一般社団法人 日本トライボロジー学会

キーワード

詳細情報 詳細情報について

問題の指摘

ページトップへ