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大型低揚程泵與泵裝置特性預(yù)測
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    摘要:

    針對大型低揚程泵站廣泛采用的軸流泵和導(dǎo)葉式混流泵兩類泵型,，通過對泵內(nèi)損失相似性的分析,，從理論上建立了水泵機(jī)械效率、水力效率,、容積效率及泵和泵裝置總效率表達(dá)式,，并采用最小二乘法對模型泵性能試驗數(shù)據(jù)進(jìn)行擬合求取泵的效率常數(shù),。所推導(dǎo)泵和泵裝置的效率公式同時考慮了泵內(nèi)形狀阻力損失、摩擦阻力損失和沖擊損失的影響,，能夠很好地適應(yīng)泵和泵裝置在設(shè)計工況點和非設(shè)計工況點的效率換算,，從而可以較準(zhǔn)確地預(yù)測原型泵裝置的動力特性。

    Abstract:

    In allusion to axial flow pump and mixed-flow diffuser pump that are widely used in large low-head pump stations, the formulas for mechanical efficiency, hydraulic efficiency and volumetric efficiency of pump were given academically by analyzing the similitude of the loss in pumps. New efficiency formulas of pump and pump system were deduced. The coefficients for efficiency of pump have been obtained by using least square method to fit the experimental data of model pump performance. The losses related to shape, hydraulic friction and strike inside pumps were all considered in the efficiency formulas and the conversion methods, so they could be well applied to the design and off-design condition. Thereby the dynamical performance of prototype pumping installation could be well and truly predicted.

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李彥軍,嚴(yán)登豐,袁壽其.大型低揚程泵與泵裝置特性預(yù)測[J].農(nóng)業(yè)機(jī)械學(xué)報,2007,38(10):36-40.[J]. Transactions of the Chinese Society for Agricultural Machinery,2007,38(10):36-40.

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