| 基于相态图像在线检测的RCP轴封内流场试验研究 |
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| 引用本文： | 陈侃,郭逸,刘伟,张君凯,任何冰.基于相态图像在线检测的RCP轴封内流场试验研究[J].排灌机械工程学报,2022,40(1):68-73. |
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| 作者姓名： | 陈侃 郭逸 刘伟 张君凯 任何冰 |
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| 作者单位： | 1. 中密控股股份有限公司, 四川 成都 610045;2. 中核核电运行管理有限公司, 浙江 嘉兴 314000 |
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| 摘 要： | 为了研究反应堆冷却剂主泵动压轴封异常工作状态、验证第三级副密封所处工况条件,开展了轴系温度分布仿真分析.采用微型内窥装置在线获取三级低压泄漏流相态图像,对所得图像进行数值化处理;采用Sobel边沿检测算法求取图像边沿化后的均方差,实现了基于内窥图像的主泵轴封低压泄漏流相态的在线监测.通过提高密封第三级泄漏背压,改善浮动...
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| 关 键 词： | 核主泵 两相流 机械密封 流体动压 相态监测 全厂停水停电工况 |
| 收稿时间： | 2020-01-09 |
Experimental study on inner flow field of RCP shaft seal based on phase image edge online detection |
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| CHEN Kan,GUO Yi,LIU Wei,ZHANG Junkai,REN Hebin.Experimental study on inner flow field of RCP shaft seal based on phase image edge online detection[J].Journal of Drainage and Irrigation Machinery Engineering,2022,40(1):68-73. |
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| Authors: | CHEN Kan GUO Yi LIU Wei ZHANG Junkai REN Hebin |
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| Institution: | 1. Sinoseal Holding Co., Ltd, Chengdu, Sichuan 610045, China; 2. China Nuclear Power Operation and Management Corporation, Jiaxing, Zhejiang 314000, China |
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| Abstract: | Abstract:In order to study the abnormal working condition of the reactor coolant pump hydrodynamic pressure shaft seal and verify the working conditions of the third stage secondary seal, a simulation analysis of the shaft temperature distribution of the syatem was carried out. The three-stage low pressure leakage flow phase state images were obtained online by using a micro endoscopic device, and a digital images process method was applied. The mean square error value was obtained by using the Sobel edge detection algorithm. The online monitoring of the phase state of the low pressure leakage flow of the RCP shaft seal was realized based on the endoscopic image. The lubrication state of the dynamic seal was improved by increasing the third-stage leakage back pressure, and the multi-level back pressure validation tests were carried out. The characteristic value obtained by Sobel edge detection algorithm for flow field image is used to evaluate the flow status change of shaft seal leakage flow field. The results show that when the back pressure equivalent water column height are H=0.77 m, 1.30, 1.55, 1.80, and the Sobel mean square error value are δs1s2=0.005 549, δs1s2=0.015 100, δs1s2=0.020 690,δs1s2=0.198 400, respectively. Based on that the above conclusions, a U-shaped pipe with the optimal height was designed, which can improve the low pressure leakage back pressure of the lubrication of the three-stage dynamic O-ring of the three stage seal. |
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| Keywords: | reactor coolant pump two-phases flow mechanical seal hydro-dynamic phase status monitoring SBO |
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