本文關(guān)鍵詞： 軸向力 離心泵 軸向間隙 水力性能 數(shù)值模擬　出處：《排灌機械工程學(xué)報》2016年04期 　論文類型：期刊論文

【摘要】：為了研究一種新型結(jié)構(gòu)的離心泵葉輪前蓋板與泵體軸向間隙對軸向力的影響,首先采用傳統(tǒng)理論計算方法得到泵的軸向力,然后基于CFX軟件,采用RNG k-ε湍流模型和高階算法,對離心泵進(jìn)行全流場數(shù)值模擬.通過改變?nèi)~輪前蓋板與泵體軸向間隙方法,獲得泵設(shè)計工況下的外特性、軸向間隙之間靜壓變化及轉(zhuǎn)子部件軸向力,研究泵外特性、軸向力隨葉輪前蓋板與泵體軸向間隙的變化情況和變化規(guī)律.通過數(shù)值模擬計算研究表明:在設(shè)計工況下,隨著離心泵葉輪前蓋板與泵體間隙的增加,泵的揚程和效率逐漸減小;葉輪、背葉輪和副葉輪內(nèi)的靜壓變化很小,葉輪前蓋板與泵體軸向間隙內(nèi)的靜壓變化明顯;泵的軸向力先增大后減小.揚程數(shù)值模擬和試驗結(jié)果誤差為0.84%,軸向力理論計算和數(shù)值模擬的最大誤差不超過5.75%,說明數(shù)值模擬的方法驗證了用經(jīng)驗公式計算新型泵所受軸向力的準(zhǔn)確性.
[Abstract]:In order to study the influence of axial clearance between the front cover plate and pump body of a new type of centrifugal pump impeller on axial force, the axial force of the pump is obtained by traditional theoretical calculation method, and then based on CFX software, RNG k- 蔚 turbulence model and high order algorithm are used. By changing the axial clearance between the front cover of the impeller and the pump body, the external characteristics of the pump under the design condition, the static pressure between the axial clearance and the axial force of the rotor parts are obtained, and the external characteristics of the pump are studied. The axial force varies with the axial clearance between the impeller front cover plate and pump body. The numerical simulation results show that: under the design condition, with the increase of the clearance between the impeller front cover plate and pump body, The static pressure in impeller, back impeller and auxiliary impeller is very small, and the static pressure in the axial clearance between the front cover plate of impeller and pump body is obvious. The axial force of the pump first increases and then decreases. The error between the head numerical simulation and the test results is 0.84.The maximum error of the axial force theory calculation and numerical simulation is not more than 5.75. It is shown that the numerical simulation method verifies the calculation of the new type pump by empirical formula. Accuracy of the axial force to which it is subjected.
【作者單位】： 西安泵閥總廠有限公司;江蘇大學(xué)國家水泵及系統(tǒng)工程技術(shù)研究中心;
【基金】：國家自然科學(xué)基金資助項目(51279068)
【分類號】：TH311
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本文編號：1511258