空氣閥水錘防護特性的主要影響參數(shù)分析及優(yōu)

doi:10.3969/j.issn.1000-1298.[year].[issue].[sequence]

首頁 > 過刊瀏覽>2009年第40卷第6期 >85-89. DOI:10.3969/j.issn.1000-1298.[year].[issue].[sequence]

空氣閥水錘防護特性的主要影響參數(shù)分析及優(yōu)
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                        10.3969/j.issn.1000-1298.[year].6.[sequence]
                    
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and Optimization of Main Influencing Parameters for Water-hammer Prevention Characteristic of Air Valves

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摘要:

對空氣閥水錘防護特性的主要影響因素進行了試驗分析。結果表明：在合理位置安裝合適進排氣孔口徑的空氣閥可有效防止因水柱分離再彌合而導致的巨大水錘升壓,，但空氣閥的防護效果受安裝位置和進排氣孔口徑的影響較大,；口徑過大,，在排氣過程中會產(chǎn)生較大的水錘升壓,，口徑過小則可能因進氣量和進氣速度不夠而達不到水錘防護的效果,，實際應用中應對進,、排氣孔口徑進行優(yōu)化或采用“快進慢出”的結構形式,；對本試驗裝置,，空氣閥應安裝在首先產(chǎn)生水柱分離的位置,，不合理的安裝位置會加劇管道中的水錘壓力上升。在此基礎上,，建立了空氣閥參數(shù)和泵出口閥關閉程序的優(yōu)化模型,，并采用遺傳算法進行求解。將上述優(yōu)化方法應用到實際供水工程的水錘防護,，提出了適宜的水錘防護措施,。

Abstract:

The main influencing parameters for water-hammer prevention characteristic of air valves are analyzed through experiment. The result indicates that the air valve with reasonable size and installation position can prevent high water hammer pressure caused by water column separation. However, the prevention effect is impressible to the size and installation position of air valve: too large size will cause large pressure during the venting process, while too little size can not obtain prevention effect for insufficient air quantity and slow intake speed. So the air valve should have rapid intake speed and slow venting speed. For the experimental system in this study, the air valve should be installed in the position where the water column separation occurs firstly. Based on the analysis result, the optimization model for the air valve parameters and closure procedure of pump outlet valve is set up and solved by using genetic arithmetic. In the end, the above optimization method is used for the water-hammer prevention of a practical water-supply project and the suggestion of suitable prevention measure is proposed. 

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劉志勇,劉梅清.空氣閥水錘防護特性的主要影響參數(shù)分析及優(yōu)[J].農(nóng)業(yè)機械學報,2009,40(6):85-89. and Optimization of Main Influencing Parameters for Water-hammer Prevention Characteristic of Air Valves[J]. Transactions of the Chinese Society for Agricultural Machinery,2009,40(6):85-89.

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