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山东大学学报 (工学版) ›› 2020, Vol. 50 ›› Issue (5): 50-55.doi: 10.6040/j.issn.1672-3961.0.2020.009

• 机械与能动工程 • 上一篇    下一篇

柔性Rushton桨的振动特性

刘欣1(),杨锋苓1,2,3,*()   

  1. 1. 山东大学机械工程学院, 山东 济南 250061
    2. 高效洁净机械制造教育部重点实验室(山东大学), 山东 济南 250061
    3. 机械工程国家级实验教学示范中心(山东大学), 山东 济南 250061
  • 收稿日期:2020-01-10 出版日期:2020-10-20 发布日期:2020-10-19
  • 通讯作者: 杨锋苓 E-mail:LiuxinToDo@163.com;fly@sdu.edu.cn
  • 作者简介:刘欣(1995—)，男，河南虞城人，硕士研究生，主要研究方向为流体搅拌混合. E-mail:LiuxinToDo@163.com
  • 基金资助:
    山东省重点研发计划资助项目(2017GGX70101)

Vibration characteristics of flexible-blade Rushton impeller

Xin LIU1(),Fengling YANG1,2,3,*()   

  1. 1. School of Mechanical Engineering, Shandong University, Jinan 250061, Shandong, China
    2. Key Lab of High-Efficiency and Clean Mechanical Manufacture (Shandong University), Ministry of Education, Jinan 250061, Shandong, China
    3. National Experimental Teaching Demonstration Center of Mechanical Engineering(Shandong University), Jinan 250061, Shandong, China
  • Received:2020-01-10 Online:2020-10-20 Published:2020-10-19
  • Contact: Fengling YANG E-mail:LiuxinToDo@163.com;fly@sdu.edu.cn

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摘要：

为了避免柔性Rushton桨的共振现象,研究搅拌桨的固有频率。采用试验测试的方法,研究该桨在静止及不同转速时的时域特性,并基于快速傅里叶变换法,得到频域特性。结果表明:静止状态下柔性叶片的振动能量主要集中在1~7Hz的频带上,不同转速时柔性叶片的振动能量主要集中在各自峰值对应的频带上,其中在47~52Hz的频带上,试验测量的各转速数据均有加速度峰值分布。在转速为2.5r/s时,加速度幅值明显增大,主振频率等于固有频率2.5Hz,可判定此时发生共振。因此,通过试验测试得到共振转速的方法,可为柔性桨合理选择转速提供依据。

关键词: 搅拌槽, 柔性Rushton桨, 振动特性, 试验测试, 共振

Abstract:

A natural frequency of a new type of flexible-blade Rushton impeller was studied to avoid a resonance phenomenon. The vibration characteristics of this impeller under stationary and rotating working conditions were experimentally investigated. Frequency domain characteristics were obtained by making Fast Fourier Transformation (FFT) of time domain characteristics. The results showed that a vibration energy of the impeller was mainly concentrated in a frequency band of 1-7Hz under the stationary state. A vibration energy of a rotating impeller with different speeds was mainly concentrated in a frequency bands corresponding to their respective peaks. Specifically, a peak acceleration distribution of acceleration data was shown in a frequency band of 47-52Hz. The acceleration amplitude increased significantly at 2.5r/s, and a main vibration frequency was equal to the natural frequency, which was 2.5Hz. So it was judged that resonance occured at this time. Therefore, the method of obtaining the resonance rotational speed through the test provided a basis for a reasonable selection of the rotational speed of the flexible-blade impeller.

Key words: stirred vessel, flexible-blade Rushton impeller, vibration characteristics, experimental measurement, resonance

中图分类号: 

  • TQ051

图1

搅拌装置及搅拌桨"

图2

试验测试装置示意图及测试设备 1—搅拌设备框架; 2—联轴器; 3—搅拌轴; 4—搅拌槽; 5—1A803E加速度传感器; 6—电动机; 7—搅拌轴固定支架; 8—电动机调速器; 9—DH5916坚固微型动态数据采集分析系统; 10—柔性Rushton桨; 11—底盘"

图3

转速为0时的柔性桨叶的振动特性曲线"

图4

转速为120r/min的柔性桨叶的振动特性曲线"

图5

转速为150r/min柔性桨叶的振动特性曲线"

图6

转速为180r/min柔性桨叶的振动特性曲线"

图7

转速为240r/min柔性桨叶的振动特性曲线"

表1

叶片振动性能测量数据"

转速/(r·min-1) 加速度幅值/(m·s-2) 主振频率/Hz
0 537.376 2.500
120 9.946 49.805
150 34.906 2.500
180 18.215 196.250
240 19.768 251.250
1 NIENOW A W . Stirring and stirred-tank reactors[J]. Chemie-Ingenieur-Technik: Verfahrenstechnik Technische Chemie Apparatewesen Biotechnologie, 2014, 86 (12): 1- 13.
2 NIENOW A W . Gas-liquid mixing studies: a comparison of Rushton turbines with some modern impellers[J]. Chemical Engineering Research and Design, 1996, 74 (4): 417- 423.
3 BOUAIFI M , ROUSTAN M . Power consumption, mixing time and homogenisation energy in dual-impeller agitated gas-liquid reactors[J]. Chemical Engineering & Processing: Process Intensification, 2001, 40 (2): 87- 95.
4 WILLIAMS J A . Keys to bioreactor selections[J]. Chemical Engineering Progress, 2002, 98 (3): 34- 41.
5 GELVES R , DIETRICH A , TAKORS R . Modeling of gas-liquid mass transfer in a stirred tank bioreactor agitated by a Rushton turbine or a new pitched blade impeller[J]. Bioprocess and Biosystems Engineering, 2014, 37 (3): 365- 375.
doi: 10.1007/s00449-013-1001-8
6 ROMAN R V , GAVRILESCU M . Oxygen transfer efficiency in the biosynthesis of antibiotics in bioreactors with a modified Rushton turbine agitator[J]. Acta Biotechnologica, 1994, 14 (2): 181- 192.
doi: 10.1002/abio.370140212
7 DEVI T T , KUMAR B . Mass transfer and power characteristics of stirred tank with Rushton and curved blade impeller[J]. Engineering Science and Technology, 2017, 20 (2): 730- 737.
8 SAITO F , NIENOW A W , CHATWIN S , et al. Power, gas dispersion and homogenisation characteristics of Scaba SRGT and Rushton turbine impellers[J]. Journal of Chemical Engineering of Japan, 1992, 25 (3): 281- 287.
9 WARMOESKERKEN M M C G , SMITH J M . The hollow blade agitator for dispersion and mass transfer[J]. Chemical Engineering Research and Design, 1989, 67, 193- 198.
10 PATWARDHAN A W , JOSHI J B . Design of gas-inducing reactors[J]. Industrial and Engineering Chemistry Research, 1999, 38 (1): 49- 80.
doi: 10.1021/ie970504e
11 MYERS K J , THOMAS A J , BAKKER A , et al. Performance of a gas dispersion impeller with vertically asymmetric blades[J]. Chemical Engineering Research and Design, 1999, 77 (8): 728- 730.
doi: 10.1205/026387699526872
12 YANG F L , ZHOU S Z , AN X H . Gas-liquid hydrodynamics in a vessel stirred by dual dislocated-blade Rushton impellers[J]. Chinese Journal of Chemical Engineering, 2015, 23 (11): 1746- 1754.
doi: 10.1016/j.cjche.2015.09.002
13 杨锋苓, 周慎杰. 错位Rushton桨的水动力学特性[J]. 华中科技大学学报(自然科学版), 2016, 44 (2): 31- 35.
YANG Fengling , ZHOU Shenjie . Characterization on hydrodynamics of dislocated-blade Rushton impeller[J]. Journal of Huazhong University of Science and Technology(Natural Science Edition), 2016, 44 (2): 31- 35.
14 YANG F L , ZHOU S Z , ZHANG C X . Turbulent flow and mixing performance of a novel six-blade grid disc impeller[J]. The Korean Journal of Chemical Engineering, 2015, 32 (5): 816- 825.
doi: 10.1007/s11814-014-0255-4
15 ZHENG Z , SUN D , LI J , et al. Improving oxygen transfer efficiency by developinga novel energy-saving impeller[J]. Chemical Engineering Research and Design, 2018, 130, 199- 207.
doi: 10.1016/j.cherd.2017.12.021
16 VASCONCELOS J M T , ORVALHO S C P , RODRIGUES A M A F , et al. Effect of blade shape on the performance of six-bladed disk turbine impellers[J]. Industrial and Engineering Chemistry Research, 2000, 39, 203- 213.
doi: 10.1021/ie9904145
17 杨锋苓, 张翠勋, 苏腾龙. 柔性Rushton搅拌桨的功耗与流场特性研究[J]. 化工学报, 2020, 71 (2): 614- 625.
YANG Fengling , ZHANG Cuixun , SU Tenglong . Power and flow characteristics of flexible-blade Rushton impeller[J]. CIESC Journal, 2020, 71 (2): 614- 625.
18 杨锋苓, 张翠勋, 李美婷. 柔性Rushton搅拌桨混合性能的试验研究[J]. 化工学报, 2020, 71 (2): 626- 632.
YANG Fengling , ZHANG Cuixun , LI Meiting . Experimental study on mixing characteristics of flexible-blade Rushton impeller[J]. CIESC Journal, 2020, 71 (2): 626- 632.
19 拉奥.机械振动[M]. 5版.李欣业,杨理诚,译.北京:清华大学出版社, 2016: 672.
20 刘习军, 贾启芬. 工程振动理论与测试技术[M]. 北京: 高等教育出版社, 2004: 397.
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