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When the magnetoelectric velocity sensor is used to test the vibration of the top cover, distortion is easy to occur due to the inherent characteristics of the sensor and the test conditions, and the data can not truly and effectively reflect the operation state of the water turbine top cover. The correlation among excitation force, vibration and strain was clarified through vibration theoretical analysis and stress calculation of top cover structure. Using finite element structural analysis to determine the weak position of the rigidity and strength of the top cover, the dynamic strain value based on this position was proposed as an indicator parameter for evaluating the operation status of the hydraulic turbine top cover. Based on the vibration value and dynamic strain value in the stable operation area, a mapping relationship between strain and vibration was established to solve the problem of inaccurate vibration measurement of the top cover. Taking a power plant unit as an example, the feasibility of the proposed method was verified.

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常规采用磁电式速度传感器测试顶盖振动时,受传感器固有特性和测试工况影响易出现失真,数据不能真实有效反映水轮机顶盖的运行状态。通过振动理论分析和顶盖结构受力计算,明确了激振力、振动与应变三者之间的相关性。以有限元结构分析确定顶盖刚强度的薄弱部位,提出基于该部位的动态应变值作为评价水轮机顶盖运行状态的指标参数,并以稳定运行区域的振动值和动态应变值为基准,建立应变与振动的映射关系,解决顶盖振动测值不准的问题。最后以某电站机组为例,验证了该方法的可行性。

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陈勇旭(1985-),男,硕士、工程师,研究方向为水电站生产技术管理,E-mail:

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陈勇旭(1985-),男,硕士、工程师,研究方向为水电站生产技术管理,E-mail:

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陈勇旭(1985-),男,硕士、工程师,研究方向为水电站生产技术管理,E-mail:

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基于动态应变的水轮机顶盖运行状态测试研究
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陈勇旭 , 郝亚鹏
水电能源科学 | 机电与控制工程 2023,41(9): 185-188
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水电能源科学 | 机电与控制工程 2023, 41(9): 185-188
基于动态应变的水轮机顶盖运行状态测试研究
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陈勇旭 , 郝亚鹏
作者信息
  • 国能大渡河猴子岩发电有限公司,四川 甘孜 626000
  • 陈勇旭(1985-),男,硕士、工程师,研究方向为水电站生产技术管理,E-mail:

Research on Test of Hydraulic Turbine Top Cover Running State Based on Dynamic Strain
Yong-xu CHEN , Ya-peng HAO
Affiliations
  • Guodian Dadu River Houziyan Hydropower Construction Co, Ltd, Ganzi 626000, China
出版时间: 2023-09-25 doi: 10.20040/j.cnki.1000-7709.2023.20230414
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常规采用磁电式速度传感器测试顶盖振动时,受传感器固有特性和测试工况影响易出现失真,数据不能真实有效反映水轮机顶盖的运行状态。通过振动理论分析和顶盖结构受力计算,明确了激振力、振动与应变三者之间的相关性。以有限元结构分析确定顶盖刚强度的薄弱部位,提出基于该部位的动态应变值作为评价水轮机顶盖运行状态的指标参数,并以稳定运行区域的振动值和动态应变值为基准,建立应变与振动的映射关系,解决顶盖振动测值不准的问题。最后以某电站机组为例,验证了该方法的可行性。

失真  /  振动理论  /  受力计算  /  有限元  /  动态应变  /  映射  /  可行性

When the magnetoelectric velocity sensor is used to test the vibration of the top cover, distortion is easy to occur due to the inherent characteristics of the sensor and the test conditions, and the data can not truly and effectively reflect the operation state of the water turbine top cover. The correlation among excitation force, vibration and strain was clarified through vibration theoretical analysis and stress calculation of top cover structure. Using finite element structural analysis to determine the weak position of the rigidity and strength of the top cover, the dynamic strain value based on this position was proposed as an indicator parameter for evaluating the operation status of the hydraulic turbine top cover. Based on the vibration value and dynamic strain value in the stable operation area, a mapping relationship between strain and vibration was established to solve the problem of inaccurate vibration measurement of the top cover. Taking a power plant unit as an example, the feasibility of the proposed method was verified.

distortion  /  vibration theory  /  force calculation  /  finite element method  /  dynamic strain  /  mapping  /  feasibility
陈勇旭, 郝亚鹏. 基于动态应变的水轮机顶盖运行状态测试研究. 水电能源科学, 2023 , 41 (9) : 185 -188 . DOI: 10.20040/j.cnki.1000-7709.2023.20230414
Yong-xu CHEN, Ya-peng HAO. Research on Test of Hydraulic Turbine Top Cover Running State Based on Dynamic Strain[J]. Water Resources and Power, 2023 , 41 (9) : 185 -188 . DOI: 10.20040/j.cnki.1000-7709.2023.20230414
2023年第41卷第9期
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doi: 10.20040/j.cnki.1000-7709.2023.20230414
  • 接收时间:2023-03-19
  • 首发时间:2026-01-28
  • 出版时间:2023-09-25
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  • 收稿日期:2023-03-19
  • 修回日期:2023-05-04
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    国能大渡河猴子岩发电有限公司,四川 甘孜 626000
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2种不同金属材料的力学参数

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鹅膏菌科Amanitaceae 2 11 5.26 鹅膏菌属 Amanita 10 4.78
小菇科 Mycenaceae 2 12 5.74 丝盖伞属 Inocybe 5 2.39
多孔菌科 Polyporaceae 8 14 6.70 蜡蘑属 Laccaria 5 2.39
红菇科 Russulaceae 3 23 11.00 小皮伞属 Marasmius 6 2.87
小菇属 Mycena 11 5.26
光柄菇属 Pluteus 5 2.39
红菇属 Russula 17 8.13
栓菌属 Trametes 5 2.39
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