Coast-Down Modeling of Canned Motor Based on Torque Behavior Study

doi:10.1007/s12204-015-1643-6

上海交通大学学报（英文版） ›› 2015, Vol. 20 ›› Issue (4): 420-426.doi: 10.1007/s12204-015-1643-6

Coast-Down Modeling of Canned Motor Based on Torque Behavior Study

XUE Ya-bo (薛亚波), YAO Zhen-qiang1,2* (姚振强), CHENG De1 (成德), SHEN Hong1,2 (沈洪), LI Meng-chao3 (李孟超)

(1. School of Mechanical Engineering, Shanghai Jiaotong University, Shanghai 200240, China; 2. State Key Laboratory of Mechanical System and Vibration, Shanghai 200240, China; 3. Harbin Electric Power Equipment Co. Ltd., Harbin 150040, China)

发布日期:2015-08-05
通讯作者: YAO Zhen-qiang (姚振强) E-mail:zqyaosjtu@gmail.com

Coast-Down Modeling of Canned Motor Based on Torque Behavior Study

XUE Ya-bo (薛亚波), YAO Zhen-qiang1,2* (姚振强), CHENG De1 (成德), SHEN Hong1,2 (沈洪), LI Meng-chao3 (李孟超)

(1. School of Mechanical Engineering, Shanghai Jiaotong University, Shanghai 200240, China; 2. State Key Laboratory of Mechanical System and Vibration, Shanghai 200240, China; 3. Harbin Electric Power Equipment Co. Ltd., Harbin 150040, China)

Published:2015-08-05
Contact: YAO Zhen-qiang (姚振强) E-mail:zqyaosjtu@gmail.com

摘要/Abstract

摘要： The coast-down behavior is specially designed to satisfy the certain flow requirements in a special kind of canned motor pump when it is used in primary reactor coolant system. However, coast-down models once used are not suitable for designing ultra-large canned motor pumps with flywheels, in which case rotor’s fluid resistance of canned motor is modeled by an empirical constant. When the size of canned motor increases, the error of empirical relationship becomes remarkable. In thrall to material’s density and strength, flow resistance of coast-down behavior should be dynamically modeled accurately to reduce the demands of materials. In this paper, an improved analytical model is proposed to study barbell-like canned motor’s coast-down characteristic based on basic torque behavior researches in Taylor-Couette flow and hydraulic coupler, where bearing’s resistance is ignored. This model takes geometric and kinematic parameters into consideration. In addition, the influence of pressure and temperature is coupled into this coast-down model by using Reolands’ viscosity relationship. Based on this model, coast-down behavior is studied and parameters sensitivity analysis is conducted from design view point. Parameters sensitivity analysis indicates that the density and distribution of materials have more remarkable influence on coast-down behavior compared with working condition and geometric parameters.

关键词: canned motor pump, coast-down behavior, Taylor-Couette (TC) flow, torque behavior, theoretical model

Abstract: The coast-down behavior is specially designed to satisfy the certain flow requirements in a special kind of canned motor pump when it is used in primary reactor coolant system. However, coast-down models once used are not suitable for designing ultra-large canned motor pumps with flywheels, in which case rotor’s fluid resistance of canned motor is modeled by an empirical constant. When the size of canned motor increases, the error of empirical relationship becomes remarkable. In thrall to material’s density and strength, flow resistance of coast-down behavior should be dynamically modeled accurately to reduce the demands of materials. In this paper, an improved analytical model is proposed to study barbell-like canned motor’s coast-down characteristic based on basic torque behavior researches in Taylor-Couette flow and hydraulic coupler, where bearing’s resistance is ignored. This model takes geometric and kinematic parameters into consideration. In addition, the influence of pressure and temperature is coupled into this coast-down model by using Reolands’ viscosity relationship. Based on this model, coast-down behavior is studied and parameters sensitivity analysis is conducted from design view point. Parameters sensitivity analysis indicates that the density and distribution of materials have more remarkable influence on coast-down behavior compared with working condition and geometric parameters.

Key words: canned motor pump, coast-down behavior, Taylor-Couette (TC) flow, torque behavior, theoretical model

中图分类号:

TH 69

XUE Ya-bo (薛亚波), YAO Zhen-qiang1,2* (姚振强), CHENG De1 (成德), SHEN Hong1,2 (沈洪), . Coast-Down Modeling of Canned Motor Based on Torque Behavior Study[J]. 上海交通大学学报（英文版）, 2015, 20(4): 420-426.

XUE Ya-bo (薛亚波), YAO Zhen-qiang1,2* (姚振强), CHENG De1 (成德), SHEN Hong1,2 (沈洪), LI Meng-chao3 (李孟超). Coast-Down Modeling of Canned Motor Based on Torque Behavior Study[J]. Journal of shanghai Jiaotong University (Science), 2015, 20(4): 420-426.

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Coast-Down Modeling of Canned Motor Based on Torque Behavior Study

Coast-Down Modeling of Canned Motor Based on Torque Behavior Study

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