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排灌机械工程学报
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排灌机械工程学报  0, Vol. Issue (): 17-    DOI:
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自清洗网式过滤器排污流量的计算
骆秀萍1,刘焕芳1,宗全利1,易平2
(1.石河子大学水利建筑工程学院,新疆 石河子 832003;2.新疆生产建设兵团勘测规划设计研究院,乌鲁木齐 832000)
 Drainage flow's calculation of self-cleaning filter
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摘要 对影响自清洗网式过滤器排污流量大小的因素进行分析,发现过滤器排污流量Qp由流量系数 决定。为了探讨排污流量系数的变化规律, 主要进行了过滤器吸沙组件相对入流面积bl/A2对排污流量系数影响的试验研究, 发现流量系数随着吸沙组件相对入流面积的增大而增大,但当相对入流面积增大到一定程度后, 流量系数就不再发生变化, 而是趋近于某一恒定值。建立了排污流量系数关系式,分析排污流量系数关系式发现:当bl/A2>0.15,即当吸沙组件入口长度l>500 mm后(吸沙组件入口宽度b=300 mm,为定值),吸沙组件开口面积对排污流量的影响已不到0.5%,即过滤器排污系数几乎不随吸沙组件开口面积的增加而改变,该变化规律与试验所作出的分析结果定性一致。根据排污流量系数关系式,进而建立了自清洗网式过滤器排污流量计算公式,对建立的公式进行均方差ERMS检验,得到ERMS=0.00 174,说明该公式具有很高的拟合度。
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骆秀萍1
刘焕芳1
宗全利1
易平2
关键词微灌   网式过滤器   自清洗   排污系统   流量系数     
Abstract: Analyzed the impact factor of the self-cleaning screen filter's drainage flow, found that the filter drainage flow Qp is determined by the flow coefficientμ. In order to investigate the drainage flow coefficient variation, mainly conducted the sand suction opening size's impact on the flow coefficient of the self-cleaning screen filter drainage system, found that the flow coefficient increases with the sand suction relative inflow area's increase, but when the relative inflow area increases to a certain extent, the flow coefficient doesn’t change and tends to a constant. Established the drainage flow coefficient formula, analyzed the drainage flow coefficient formula and found that: when bl/A2>0.15,that is when the sand suction entrance length l>500mm(The sand suction entrance width b=300mm ,is a constant ),the sand suction opening area has less than 0.5% impact on drainage flow, the drainage coefficient hardly changes with the sand suction opening area’s increase, this variation is con-sistent with the test analysis results. According to the drainage flow coefficient for-mula, established the self-cleaning screen filter drainage flow calculation formula, conducted the mean square deviation ERMS inspection of the formula, obtained ERMS=0.00174,showed that the formula has a high fitness.
Key wordsMicro-irrigation;Screen filter;Self-cleaning   Drainage system;Flow co-efficient   
引用本文:   
骆秀萍1,刘焕芳1,宗全利1等. 自清洗网式过滤器排污流量的计算[J]. 排灌机械工程学报, 0, (): 17-.
LUO Xiu-Ping-1,LIU Huan-Fang-1,ZONG Quan-Li-1 et al.  Drainage flow's calculation of self-cleaning filter[J]. Journal of Drainage and Irrigation Machinery Engin, 0, (): 17-.
 
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