流体激振力对高速泵转子振动特性的影响研究

Effect of the Hydrodynamic Forces on the Vibration of Rotor in a Centrifugal Pump

1.
Beijing Aerospace Propulsion Institute,Beijing 100076;
2.
School of Energy Science and Engineering,Harbin Institute of Technology,Harbin 150001

摘要: 对高速泵三维流场进行了非定常计算,分析了高速泵内的压力分布情况。研究了高速泵叶轮上的稳态径向力和脉动径向力,分析了流体激振力对高速泵叶轮系统的振动及其轴心轨迹的影响。计算结果表明:泵内部流场的压力分布合理,稳态作用力的计算符合实际数据;瞬态作用力与叶轮和隔舌的干涉流动有很大关系;在脉动激振力作用下,泵转子振动响应谱图中出现了脉动激振力的频率及其谐波频率。
- 高速泵 /
- 振动 /
- 转子 /
- 流体激振力 /
- 数值计算
Abstract: Unsteady computation of 3-D flow field in centrifugal pump is calculated,and static pressure distributionof centrifugal pump is analyzed. The volute and the hydrodynamic radial direction forces on the impeller are investi-gated,and the effect on vibration characteristics and the shaft centerline orbit of centrifugal bump system are ob-tained and analyzed. The calculated result shows that the flow field of centrifugal pump is reasonable,the calculat-ed steady force is close to experimental result,the unsteady forces are related to impeller-tongue interactions; Un-der the action of hydrodynamic forces,the frequencies of hydrodynamic forces and harmonics occur in rotor of thecentrifugal pump.
- pump /
- vibration /
- rotor /
- hydrodynamic force /
- numerical computation

[1]	Gonzalez J. Steady and unsteady radial forces for a centrifugalpump with impeller to tongue gap variation[J]. Journal of Flu-id Engineering，2006，128(2):454～462
[2]	Kato C，Yamade Y. Prediction of the noise from a multi-stagecentrifugal pump[A]. ASME Fluids Engineering DivisionSummer Meeting[C]，2005
[3]	Benra F K，Dohmen H J. Comparison of pump impeller orbitcurves obtained by measurement and FSI simulation[A]. 2007ASME Pressure Vessels and Piping Division Conference[C]，2007
[4]	Dring R P，Joslyn H D. Turbine rotor-stator interaction[J]．ASME Journal Engineering Power，1982，104(4):729～742
[5]	Shi F，Tsukamoto H. Numerical study of pressure fluctuationscaused by impeller-diffuser interaction in a diffuser pumpstage[J]. Transactions of the ASME，2001，123 (9):466～474
[6]	黄思，吴玉林. 高速泵内三维流场非对称性及泵受力的数值分析[J]. 流体机械，2006，34(2):30～33
[7]	刘全忠，宫汝志. 高速泵隔舌间隙对叶轮流体作用力的影响[J]. 水泵技术，2009，(4):26～28
[8]	袁寿其，薛菲，袁建平. 高速泵压力脉动对流动噪声影响的试验研究[J]. 排灌机械，2009，27(5):287～290
[9]	王福军，张玲，黎耀军. 轴流式水泵非定常湍流数值模拟的若干关键问题[J]. 机械工学报，2008，44(8):73～77