Measuring Result of Self-induced Vibration in Pipeline System using Automatic Pressure Regulator and Constant Flow Valve and the Control Measure

Inagaki Hitone, Saito Masaki, Nara Yamato, Takeshita Shinichi, Akiyoshi Yasuhiro

doi:10.7132/jrcsa.kj00004364698

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Other Title

自動減圧弁と定流量弁を含むパイプラインシステムにおける自励振動の発生例とその抑制対策
ジドウゲンアツベントテイリュウリョウベンオフクムパイプラインシステムニオケルジレイシンドウノハッセイレイトソノヨクセイタイサク

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Description

Self-induced vibration is possibly caused by the semi-closed pipeline combining the automatic pressure regulator with the automatic constant flow valve. Thus, a test was conducted on the site to analyze the generation of the coupled oscillation between the automatic pressure regulator and the direct-acting constant flow valve. Further, the investigation was conducted in order to show the function of the constant flow valve, obtain self-excited oscillation, and to study the control measure. Consequently, when the direct-acting constant flow valve is used near the setting flow, the working mechanism activates the valve using the pipe pressure and the large self-excited oscillation can be induced. On the other hand, when the flow is smaller than that of the setting flow of the direct-acting constant flow valve, the self-excited oscillation is not generated. Further, with regard to the measures to control self- excited oscillation, it is known that self- excited oscillation is not completely restrained by merely blunting the response sensitivity of the automatic pressure regulator.

Journal

Journal of Rainwater Catchment Systems

Journal of Rainwater Catchment Systems 11 (2), 25-37, 2006

Japan Rainwater Catchment Systems Association

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