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大型雙吸離心泵葉輪動(dòng)應(yīng)力特性
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國(guó)家自然科學(xué)基金資助項(xiàng)目（51079151、50779070）;北京市自然科學(xué)基金重點(diǎn)資助項(xiàng)目（3071002）;高等學(xué)校博士學(xué)科點(diǎn)專項(xiàng)科研基金資助項(xiàng)目（0100008110012）


Dynamic Stress of Large Double-suction Centrifugal Pump Impeller
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    摘要:

    基于順序流固耦合理論，以雙吸泵內(nèi)部非定常流場(chǎng)信息作為力學(xué)邊界條件，采用有限元方法，對(duì)一臺(tái)大型雙吸離心泵葉輪進(jìn)行了瞬態(tài)動(dòng)力學(xué)分析。主要考察了5個(gè)流量工況(0.6Qd、0.8Qd、Qd、1.1Qd、1.2Qd)下的葉輪動(dòng)應(yīng)力特征。結(jié)果表明，在不同流量工況下葉輪表面動(dòng)應(yīng)力分布趨勢(shì)基本相似，最大應(yīng)力點(diǎn)出現(xiàn)在葉片進(jìn)口或出口邊靠近前蓋板的根部區(qū)域；在小流量(0.6Qd)工況下，動(dòng)應(yīng)力水平最高；葉片動(dòng)應(yīng)力隨時(shí)間呈周期性變化；動(dòng)應(yīng)力頻率成分主要為葉輪轉(zhuǎn)頻及其諧頻。

    Abstract:

    The dynamic stress analysis for a large double-suction centrifugal pump impeller was presented by using the finite element method. This analysis was based on the sequential fluid-structure interaction theory. The pressure pulsation obtained from flow simulation by using CFD code was set as the force boundary condition. The dynamic stress characteristics of the impeller under five flow conditions (0.6Qd, 0.8Qd, Qd, 1.1Qd, 1.2Qd) were given. The results showed that the maximum stress of the impeller appeared at trailing edge or leading edge region of the blade near shroud. The stress distributions on impeller blade surfaces under different flow rate conditions are similar to each other. The level of dynamic stress under 0.6Qd is the highest. The dynamic stress varies periodically with the impeller rotating. It is also found that the fundamental frequencies of the dynamic stress are the rotating frequency and its harmonic frequency.

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高江永,王福軍,瞿麗霞,劉竹青,戚蘭英.大型雙吸離心泵葉輪動(dòng)應(yīng)力特性[J].農(nóng)業(yè)機(jī)械學(xué)報(bào),2012,43(1):42-47,52. Gao Jiangyong, Wang Fujun, Qu Lixia, Liu Zhuqing, Qi Lanying. Dynamic Stress of Large Double-suction Centrifugal Pump Impeller[J]. Transactions of the Chinese Society for Agricultural Machinery,2012,43(1):42-47,52.

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  • 在線發(fā)布日期: 2012-01-12
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