Observation and Pressure Measurement of Cavitation Region in Mechanical Seal

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  • ITADANI Masatoshi
    Engineering Research Department, Engineering Division, Eagle Industry Co., Ltd.
  • UEMURA Norio
    Engineering Division, Eagle Industry Co., Ltd.
  • SUGIMURA Joichi
    Department of Mechanical Engineering, Faculty of Engineering, Kyushu University

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Other Title
  • メカニカルシールにおけるキャビテーション領域の観察と圧力測定
  • メカニカルシールにおけるキャビテーション領域の観察と圧力測定 : 水を密封流体とした場合
  • メカニカルシール ニ オケル キャビテーション リョウイキ ノ カンサツ ト アツリョク ソクテイ : ミズ オ ミップウ リュウタイ ト シタ バアイ
  • ―In the Case with Water as Sealed Fluid―
  • ―水を密封流体とした場合―

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Abstract

<p>The objective of this study is to experimentally investigate cavitation pressure in the sliding surface of a mechanical seal. The reversed Rayleigh-step was formed to generate negative pressure and the formation of cavities was directly observed with a CMOS camera. A pinhole was produced in the Rayleigh-step groove, and the pressure in the cavitation region was measured directly with a diaphragm-type pressure sensor placed in the hole. Water was used as the sealing fluid. It was found that the cavitation pressure depended on temperature of water, and was almost equal to the vapor pressure of water. On the other hand, the pressure of the sealed water had no effect on the cavitation pressure.</p>

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