| Flow and cavitation characteristics of water hydraulic poppet valves |
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| 作者姓名： | 廖义德 刘银水 黄艳 李壮云 |
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| 作者单位： | Dept. of Mechanical Engineering，College of Mechanical Engineering and Science，College of Mechanical Engineering and Science，College of Mechanical Engineering and Science Wuhan Institute of Chemical Technology，Wuhan 430073，China，College of Mechanical Engineering and Science，Huazhong University of Science and Technology，Wuhan 430074，China，Huazhong University of Science and Technology，Wuhan 430074，China，Huazhong University of Science and Technology，Wuhan 430074，China，Huazhong University of Science and Technology，Wuhan 430074，China |
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| 基金项目： | SponsoredbytheNationalNaturalScienceFoundationofChina (GrantNo.5 9975 0 31) . |
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| 摘 要： | 0 ＩＮＴＲＯＤＵＣＴＩＯＮＷａｔｅｒｈｙｄｒａｕｌｉｃｓｙｓｔｅｍｈａｓｍａｎｙａｄｖａｎｔａｇｅｓｓｕｃｈａｓｅｎｖｉｒｏｎｍｅｎｔａｌｆｒｉｅｎｄｌｉｎｅｓｓ ,ｓａｆｅｔｙ ,ｅｔｃ .ａｎｄａｔｔｒａｃｔｓｍｏｒｅａｎｄｍｏｒｅａｔｔｅｎｔｉｏｎｎｏｗａｄａｙｓ1] .Ｐｏｐｐｅｔｖａｌｖｅｓ ,ｊｕｓｔａｓｉｎｏｉｌｈｙｄｒａｕｌｉｃｓｙｓｔｅｍ ,ａｒｅｃｏｍｍｏｎｌｙｕｓｅｄｉｎｗａｔｅｒｈｙｄｒａｕｌｉｃｓｙｓｔｅｍ .Ｈｏｗｅｖｅｒ ,ｂｅｃａｕｓｅｏｆｌｏｗｖｉｓｃｏｓｉｔｙａｎｄｈｉｇｈｖ…
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Flow and cavitation characteristics of water hydraulic poppet valves |
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| LIAO Yi-de ,LIU Yin-shui,HUANG Yan,LI Zhuang-yun.Flow and cavitation characteristics of water hydraulic poppet valves[J].Journal of Harbin Institute of Technology,2002,9(4). |
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| Authors: | LIAO Yi-de LIU Yin-shui HUANG Yan LI Zhuang-yun |
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| Affiliation: | 1. Dept. of Mechanical Engineering,Wuhan Institute of Chemical Technology, Wuhan 430073, China;College of Mechanical Engineering and Science, Huazhong University of Science and Technology, Wuhan 430074,China
2. College of Mechanical Engineering and Science, Huazhong University of Science and Technology, Wuhan 430074,China |
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| Abstract: | Two types of poppet valves were tested, one is a poppet with a sharp-edged seats, and the other is that with a chamfered seat. During the tests, the effects of backpressure and poppet lift on flow characteristics were considered. Cavitation inception was detected by the appearance and rapid growth of a particular low frequency component of the outlet pressure fluctuation of valve when cavitation occurs. Experimental results show cavitation, back pressure, valve opening and its geometrical shape have significant effects on the flow characteristics of valve. The flow coefficient of throttle with water used as working medium is 0. 85～0. 95 when there is no cavitation. The pressure drop of flow saturation decreases with the increasing of poppet lift. The sharp-edged throttle has stronger anti-cavitation ability than the chamfered one. |
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| Keywords: | water hydraulics poppet valve flow coefficient frequency spectra analysis cavitation inception |
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