The characteristics of the transient rotational speed of centrifugal pumps are of great significance for pump state recognition as it is closely related to the internal flow and the state of operating centrifugal pumps. In order to investigate the characteristics of the transient rotational speed of centrifugal pumps, the transient speed of a singlestage singlesuction centrifugal pump (type IS6550160) was measured precisely by an encoder with the utilization of virtual instrument technology. Furthermore, a time—frequency characteristic spectrum of the transient rotating speed under different operation conditions was established and analyzed. The results show that the speed of the centrifugal pumps decreases turbulently with the increasing of flow rate. Under design conditions, the speed also fluctuate by about 20 r/min. In addition, the fluctuation is periodic and the rotating frequency of the impeller plays a dominant role in the speed fluctuation under both design and offdesign conditions. The RMS of the speed fluctuation and the amplitude of the dominant frequency become higher with the increasing of flow rate.
[1] 马新华,冯琦,蒋小平,等.多级离心泵内部非定常压力脉动的数值模拟[J]. 排灌机械工程学报,2016,01:26-31.
MA Xinhua, FENG Qi, JIANG Xiaoping, et al. Numerical simulation of unsteady pressure pulsation in multistage centrifugal pump[J]. Journal of Drainage and Irrigation Machinery Engineering, 2016,01:26-31.
[2] Ahonen Tero, Tamminen Jussi, Ahola Jero, et al. Frequency-converter-based hybrid estimation method for the centrifugal pump operational state[J]. IEEE Transactions on Industrial Electronics, 2012,59(12):4803-4809.
[3] 冒杰云,袁寿其,张金凤,等.低比转数离心泵驼峰工况附近内部流动特性分析[J]. 排灌机械工程学报, 2015,33(4):283-289.
MAO Jieyun,YUAN Shouqi, ZhANG Jinfeng, et al. Analysis of inner flow in low——specific centrifugal pump at conditions near hump[J]. Journal of Drainage and Irrigation Machinery Engineering, 2015, 33(4): 283-289.
[4] 付燕霞,袁寿其,袁建平,等. 离心泵小流量工况下的内部流动特性[J]. 排灌机械工程学报, 2014,32(3):185-190.
FU Yanxia, YUAN Shouqi, YUAN Jianping, et al. Internal flow characters of centrifugal pump at low flow rates[J]. Journal of Drainage and Irrigation Machinery Engineering, 2014,32(3):185-190.
[5] Tan L, Zhu B, Wang Y, et al. Numerical study on characteristics of unsteady flow in a centrifugal pump volute at partial load condition[J]. Engineering Computations, 2015, 32(6): 1549-1566.
[6] Tsukamoto H., Yoneda H., Sagara K. The response of a centrifugal pump to fluctuating rotational speed[J]. Journal of fluids engineering, 1995,117(3):479-484.
[7] Perovic S, Unsworth P J, Higham E H. Fuzzy logic system to detect pump faults from motor current spectra[C]//Industry Applications Conference, 2001. Thirty-Sixth IAS Annual Meeting. Conference Record of the 2001 IEEE. IEEE, 2001, 1: 274-280.
[8] Chudina M. Noise as an Indicator of Cavitation in a Centrifugal Pump[J]. Acoustical Physics, 2003,49(4):463-474.
[9] Ahonen T., Tamminen J., Ahola J., et al. Novel method for detecting cavitation in centrifugal pump with frequency converter[J]. Insight-Non-Destructive Testing and Condition Monitoring, 2011,53(8):439-449.
[10] Clark Joseph B., Guan Yulong, McCoach Robert, et al. An investigational study of minimum rotational pump speed to avoid retrograde flow in three centrifugal blood pumps in a pediatric extracorporeal life support model[J]. Perfusion, 2011,26(3):185-190.
[11] 周盼,张权,率志君,等. 离心泵进水口形式设计及其对振动噪声的影响[J]. 排灌机械工程学报, 2015, 33(1): 16-19.
ZHOU Pan,ZHANG Quan,SHUAI Zhijun,et al. Inlet design and its influence on vibration and noise of centrifugal pump[J]. Journal of Drainage and Irrigation Machinery Engineering, 2015, 33(1): 16-19.
[12] 谈明高, 戴菡葳, 刘厚林, 等. 多级离心泵叶轮时序对振动性能影响的数值研究[J]. 振动与冲击,2015,34(24): 117-122.
TAN Minggao, DAI Hanwei, LIU Houlin, et al. Numerical simulation on the effect of impeller clocking position on vibration of multistage centrifugal pump[J]. JOURNAL OF VIBRANTION AND SHOCK, 2015, 34(24): 117-122.
[13] 李凤琴, 郑光泽, 艾晓玉. 发动机双平衡轴系统设计分析[J]. 振动与冲击,2014,33(5): 58-63.
LI Fengqin, ZHENG Guangze, AI Xiaoyu. Analysis of balancer shafts system in internal combustion engines[J]. JOURNAL OF VIBRANTION AND SHOCK, 2014, 33(5): 58-63.
[14] 贾然, 王立勇, 徐小力. 往复发动机故障诊断转速测量与相位识别系统研究[J]. 内燃机,2015 (1): 32-34.
JIA Ran, WANG Liyong, XU Xianli. Research of Speed Measurement and Phase Identification System for Reciprocating Engine Fault Diagnosis[J]. Internal Combustion Engines, 2015 (1): 32-34.
[15] 董静, 万秋华, 赵长海, 等. 光电编码器故障诊断技术研究现状与展望[J]. 中国光学,2015,8(5):755-767.
DONG Jing, WAN Qiuhua, ZHAO Changhai, et al. Current situation and prospect of fault diagnosis for photoelectric encoder[J]. Chinese Optics, 2015,8(5):755-767.
[16] Al-Hashmi S, Gu F, Li Y, et al. Cavitation Detection of a Centrifugal Pump Using Instantanous Angular Speed[C]//ASME 7th Biennial Conference on Engineering Systems Design and Analysis. American Society of Mechanical Engineers, 2004: 185-190.
[17] 郭义航,袁寿其,骆寅,等. 基于CFD的离心泵叶片水力矩非定常特性[J]. 排灌机械工程学报,2016,06:470-476.
GUO Yihang, YUAN Shouqi, LUO Yin, et al. Unsteady characteristics of blade hydraulic moment in centrifugal pumps with CFD[J]. Journal of Drainage and Irrigation Machinery Engineering, 2016,06:470-476.
[18] Lei T, Shan Z B, Liang C S, et al. Numerical simulation of unsteady cavitation flow in a centrifugal pump at off-design conditions[J]. Proceedings of the Institution of Mechanical Engineers, Part C: Journal of Mechanical Engineering Science, 2014, 228(11): 1994-2006.
[19] 王松林,谭磊,王玉川. 离心泵蜗壳内非定常流动特性[J]. 振动与冲击,2014,11:43-48.
WANG Songlin, TAN Lei, WANG Yuchuan. Characteristics of unsteady flow in a centrifugal pump volute[J]. JOURNAL OF VIBRANTION AND SHOCK, 2014,11:43-48.
[20] Qu W, Tan L, Cao S, et al. Numerical investigation of clocking effect on a centrifugal pump with inlet guide vanes[J]. Engineering Computations, 2016, 33(2): 465-481.
[21] 王少君,刘永强,杨绍普,等. 基于光电编码器的测速方法研究及实验验证[J]. 自动化与仪表,2015,06:68-72.
WANG Shaojun, LIU Yongqiang, YANG Shaopu, et al. Research of Speed Measuring Methods and Experimental Verification Based on Photoelectric Encoder.[J], Automation &Instrumentation, 2015,06:68-72.
[22] Luo Yin, Yuan Shouqi, Yuan Jianping, et al. Research on Characteristic of the Vibration Spectral Entropy for Centrifugal Pump[J]. Advances in Mechanical Engineering, 2014,6:698938.