本文關(guān)鍵詞： 離心泵 試驗 葉輪 平衡孔泄漏量 軸向力　出處：《農(nóng)業(yè)工程學(xué)報》2017年07期 　論文類型：期刊論文

【摘要】：針對離心泵上葉輪平衡孔的實際液體泄漏量難以測量的問題,設(shè)計了通過調(diào)節(jié)平衡腔液體壓力來測量平衡孔液體泄漏量的試驗裝置,在平衡孔直徑4、6、8、11 mm條件下對泵性能、平衡孔液體泄漏量和平衡腔液體壓力進(jìn)行了測試及分析,獲得了不同直徑平衡孔下泵的性能曲線、平衡孔泄漏量系數(shù)和軸向力系數(shù)與比面積的關(guān)系曲線。試驗結(jié)果表明:加大葉輪平衡孔直徑會使泵的揚程降低、輸入功率增大和效率降低;平衡孔液體泄漏量系數(shù)與比面積關(guān)系曲線有明顯的規(guī)律性,其隨著比面積增大而減小,且揚程系數(shù)對其有較大的影響;軸向力系數(shù)曲線是非線性曲線,在比面積小于2.5時,軸向力系數(shù)隨比面積增大而急劇減小;比面積大于等于2.5小于等于4.5時,軸向力系數(shù)曲線趨于平坦,其均值為0.112;比面積大于4.5時,軸向力系數(shù)曲線幾乎與橫坐標(biāo)平行,其均值為0.067。該研究為較精確計算平衡孔液體泄漏量與平衡腔區(qū)域的軸向力提供了參考。
[Abstract]:In order to solve the problem that the actual liquid leakage of impeller balancing hole on centrifugal pump is difficult to be measured, a test device is designed to measure the liquid leakage of balance hole by adjusting the liquid pressure in the balance chamber. The pump performance is obtained under the condition of the diameter of the balance hole being 4 ~ 6 ~ 811 mm. The liquid leakage and pressure of the balance cavity were measured and analyzed, and the performance curves of the pump with different diameters were obtained. The experimental results show that increasing the diameter of the balance hole of the impeller will reduce the head of the pump, increase the input power and reduce the efficiency. The relation curve between liquid leakage coefficient and specific area has obvious regularity, and it decreases with the increase of specific area, and the lift coefficient has a great influence on it, the axial force coefficient curve is a nonlinear curve, when the specific area is less than 2.5, the axial force coefficient curve is a nonlinear curve, and the axial force coefficient curve is a nonlinear curve when the specific area is less than 2.5. The axial force coefficient decreases sharply with the increase of specific area, when the specific area is greater than 2.5 or less than or equal to 4.5, the axial force coefficient curve tends to be flat, its mean value is 0.112, and when the specific area is greater than 4.5, the axial force coefficient curve is almost parallel to the horizontal coordinate. The mean value is 0.067. This study provides a reference for the calculation of the liquid leakage in the balance hole and the axial force in the region of the equilibrium cavity.
【作者單位】： 蘭州理工大學(xué)能源與動力工程學(xué)院;蘭州理工大學(xué)溫州泵閥工程研究院;
【基金】：國家自然科學(xué)基金資助項目(51269010) 甘肅省自然科學(xué)基金資助項目(1508RJYA077) 浙江省自然科學(xué)基金資助項目(LY12E09002)
【分類號】：TH311

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本文編號：1522526