Analysis of Vibration Characteristics of Marine Centrifugal Pump Excited by Multiple Vibration Sources
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摘要: 为了确定流体激励和轴系激励对离心泵振动的主要影响,通过对离心泵进行非定常流场计算,分析流体激励和轴系激励诱导离心泵振动特性。选择采用轴系不对中作为激励源,结果表明:轴系不对中时,离心泵在1APF(电机转动频率)处振动响应增强,并出现明显的2APF响应,1BPF(1倍叶片通过频率)处振级和中频段振级几乎无变化;当流体激励并伴有轴系不对中时,离心泵在1APF处和1BPF处出现明显的振动响应,1BPF处的振级与仅轴系激励时相差较大。Abstract: In order to determine the scope of influence of fluid excitation and shafting excitation on the centrifugal pump vibration, we calculated the unsteady flow field of a centrifugal pump and analyzed the vibration characteristics of this pump under fluid excitation and shafting excitation. We choose to use misalignment fault of rotor system as the shafting excitation in this paper. The numerical simulation results show that when the shafting is misaligned, the vibration response of the pump at 1APF (motor rotational frequency) is enhanced, a significant vibration response occurred at 2APF, and there is almost no change in the vibration level at 1BPF (blade passing frequency) and the middle-frequency. When the centrifugal pump is excited by fluid excitation and the misaligned excitation, the centrifugal pump has obvious vibration response at 1APF and 1BPF. The vibration level at 1BPF differs greatly from that at shafting excitation only.
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表 1 离心泵主要结构参数
参数名称 数值 叶轮进口直径D1/mm 100 叶轮出口直径D2/mm 260 叶片数Z 6 叶片包角$ \theta $/(°) 130 叶片出口宽度b2/mm 13 蜗壳基圆直径D3/mm 270 蜗壳进口宽度b3/mm 25 蜗壳出口直径D4/mm 80 表 2 网格无关性验证
方案 蜗壳网格数 泵腔网格数 叶轮网格数 扬程/m 1 $ {\text{9}}{\text{.6}} \times {\text{1}}{{\text{0}}^{\text{4}}} $ $ {\text{8}}{\text{.94}} \times {\text{1}}{{\text{0}}^{\text{5}}} $ $ {\text{2}}{\text{.17}} \times {\text{1}}{{\text{0}}^{\text{5}}} $ 84.81 2 $ {\text{1}}{\text{.38}} \times {\text{1}}{{\text{0}}^{\text{5}}} $ $ {\text{1}}{\text{.52}} \times {\text{1}}{{\text{0}}^{\text{6}}} $ $ {\text{3}}{\text{.08}} \times {\text{1}}{{\text{0}}^{\text{5}}} $ 83.02 3 $ {\text{1}}{\text{.76}} \times {\text{1}}{{\text{0}}^{\text{5}}} $ $ {\text{1}}{\text{.72}} \times {\text{1}}{{\text{0}}^{\text{6}}} $ $ {\text{3}}{\text{.75}} \times {\text{1}}{{\text{0}}^{\text{5}}} $ 82.24 4 $ {\text{5}}{\text{.27}} \times {\text{1}}{{\text{0}}^{\text{5}}} $ $ {\text{1}}{\text{.93}} \times {\text{1}}{{\text{0}}^{\text{6}}} $ $ {\text{4}}{\text{.45}} \times {\text{1}}{{\text{0}}^{\text{5}}} $ 82.03 5 $ {\text{2}}.43 \times {\text{1}}{{\text{0}}^{\text{6}}} $ $ {\text{2}}{\text{.75}} \times {\text{1}}{{\text{0}}^{\text{6}}} $ $ {\text{5}}{\text{.87}} \times {\text{1}}{{\text{0}}^{\text{5}}} $ 82.17 -
[1] 赵宇琪. 离心泵空化判定及其流声特性研究[D]. 镇江: 江苏大学, 2018ZHAO Y Q. Research on cavitation diagnosis and its characteristics of flow field and acoustic field in centrifugal pump[D]. Zhenjiang: Jiangsu University, 2018 (in Chinese) [2] DONG L, DAI C, LIN H B, et al. Noise comparison of centrifugal pump operating in pump and turbine mode[J]. Journal of Central South University, 2018, 25(11): 2733-2753 doi: 10.1007/s11771-018-3950-1 [3] 谈明高, 王勇, 刘厚林, 等. 叶片数对离心泵内流诱导振动噪声的影响[J]. 排灌机械工程学报, 2012, 30(2): 131-135 doi: 10.3969/j.issn.1674-8530.2012.02.002TAN M G, WANG Y, LIU H L, et al. Effects of number of blades on flow induced vibration and noise of centrifugal pumps[J]. Journal of Drainage and Irrigation Machinery Engineering, 2012, 30(2): 131-135 (in Chinese) doi: 10.3969/j.issn.1674-8530.2012.02.002 [4] DONG L, DAI C, LIU H L, et al. Experimental and numerical investigation of interior flow-induced noise in pump as turbine[J]. Journal of Vibroengineering, 2016, 18(5): 3383-3396 doi: 10.21595/jve.2016.17096 [5] 邱家俊. 汽轮发电机转子由电磁参数所激发的参数振动规律[J]. 天津大学学报, 1981(4): 83-95QIU J J. The rules of Parameters vibration of rotor of steamturbine generator excited by electromagnetic parameters[J]. Journal of Tianjin University, 1981(4): 83-95 (in Chinese) [6] 马震岳, 张雷克, 陈婧. 水轮发电机组转子-轴承系统横向振动特性分析[J]. 黑龙江大学工程学报, 2010, 1(4): 17-23MA Z Y, ZHANG L K, CHEN J. Lateral vibration analysis of rotor-bearing system for hydroelectric set[J]. Journal of Engineering of Heilongjiang University, 2010, 1(4): 17-23 (in Chinese) [7] 古振学. 离心泵产生振动的原因及解决方法[J]. 油气储运, 2000, 19(10): 55-57, 7 doi: 10.3969/j.issn.1000-8241-D.2000.10.020GU Z X. A case analysis on the vibration of centrifugal pump[J]. Oil & Gas Storage and Transportation, 2000, 19(10): 55-57, 7 (in Chinese) doi: 10.3969/j.issn.1000-8241-D.2000.10.020 [8] 曾永龙. 冶金除尘风机状态监测与故障诊断系统研究[D]. 武汉: 武汉科技大学, 2008ZENG Y L. The system of metallurgie dedusting fan status monitoring and faulty diagnosis[D]. Wuhan: Wuhan University of Science and Technology, 2008 (in Chinese) [9] 安辉, 刘光临, 沈全成, 等. 除尘风机网络化在线监控与故障诊断系统的研制[J]. 机床与液压, 2006(12): 230-231, 195 doi: 10.3969/j.issn.1001-3881.2006.12.081AN H, LIU G L, SHEN Q C, et al. Research on the remote network online monitoring and diagnostics system of dust-collecting fan[J]. Machine Tool & Hydraulics, 2006(12): 230-231, 195 (in Chinese) doi: 10.3969/j.issn.1001-3881.2006.12.081 [10] MUSZYŃSKA A. Rotordynamics[M]. Boca Raton: Taylor & Francis, 2005 [11] 钟一谔, 何衍宗, 王正, 等. 转子动力学[M]. 北京: 清华大学出版社, 1987ZHONG Y E, HE Y Z, WANG Z, et al. Rotor dynamics[M]. Beijing: Tsinghua University Press, 1987 (in Chinese) [12] 吴仁荣. 降低船用离心泵运行振动和噪声的结构设计(一)[J]. 舰船科学技术, 1980(4): 23-26WU R R. Structural design for reducing vibration and noise of marine centrifugal pump (I)[J]. Ship Science and Technology, 1980(4): 23-26 (in Chinese) [13] 吴仁荣. 降低船用离心泵运行振动和噪声的结构设计(二)[J]. 舰船科学技术, 1980(5): 79-84WU R R. Structural design for reducing vibration and noise of marine centrifugal pump (II)[J]. Ship Science and Technology, 1980(5): 79-84 (in Chinese) [14] 何宵琼. 轴系振动对两级离心泵组振动影响分析[D]. 哈尔滨: 哈尔滨工程大学, 2015HE X Q. Analysis of the effect on shafting vibration of the centrifugal two stage pump unit[D]. Harbin: Harbin Engineering University, 2015 (in Chinese) [15] YOSHIDA Y, TSUJIMOTO Y, KAWAKAMI T, et al. Unbalanced hydraulic forces caused by geometrical manufacturing deviations of centrifugal impellers[J]. Journal of Fluids Engineering, 1998, 120(3): 531-537 doi: 10.1115/1.2820695 [16] 董亮, 代翠, 孔繁余, 等. 离心泵作透平流体诱发内场噪声特性及贡献分析[J]. 机械工程学报, 2016, 52(18): 184-192DONG L, DAI C, KONG F Y, et al. Flow-induced noise characteristic and contribution to interior noise for centrifugal pump as turbine[J]. Journal of Mechanical Engineering, 2016, 52(18): 184-192 (in Chinese) [17] 何涛, 尹志勇, 孙玉东. 离心泵流动诱发振动特性数值计算分析[J]. 振动与冲击, 2012, 31(12): 96-102HE T, YIN Z Y, SUN Y D. Numerical analysis for flow induced vibration of a centrifugal pump[J]. Journal of Vibration and Shock, 2012, 31(12): 96-102 (in Chinese) [18] 郭宁, 向阳, 张波, 等. 船用离心泵低频振动特性分析[J]. 船海工程, 2018, 47(4): 88-93 doi: 10.3963/j.issn.1671-7953.2018.04.021GUO N, XIANG Y, ZHANG B, et al. Analysis of low-frequency vibration characteristics of marine centrifugal pump[J]. Ship & Ocean Engineering, 2018, 47(4): 88-93 (in Chinese) doi: 10.3963/j.issn.1671-7953.2018.04.021