CAUSE ANALYSIS OF CONNECTIN-END FAILURE FOR BEARING PEDESTAL OF THE VALVE CONCERNING SEA-WATER PUMP OF UNIT NO.5

ZHAO Gang; CHEN Peng; GAO Yan

doi:10.19666/j.rlfd.2006.12.020

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CAUSE ANALYSIS OF CONNECTIN-END FAILURE FOR BEARING PEDESTAL OF THE VALVE CONCERNING SEA-WATER PUMP OF UNIT NO.5

更新时间：2025-09-28

- CAUSE ANALYSIS OF CONNECTIN-END FAILURE FOR BEARING PEDESTAL OF THE VALVE CONCERNING SEA-WATER PUMP OF UNIT NO.5
- Thermal Power Generation Issue 12, Pages: 62-63(2006)
- 作者机构：
  
  1. 月亮湾燃机电厂
  2. 华南理工大学
- 作者简介：
- 基金信息：
- DOI：10.19666/j.rlfd.2006.12.020
  CLC： TG172.2
- Published：2006
- 稿件说明：
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ZHAO Gang, CHEN Peng, GAO Yan. CAUSE ANALYSIS OF CONNECTIN-END FAILURE FOR BEARING PEDESTAL OF THE VALVE CONCERNING SEA-WATER PUMP OF UNIT NO.5[J]. Thermal power generation, 2006, (12): 62-63.
DOI：

ZHAO Gang, CHEN Peng, GAO Yan. CAUSE ANALYSIS OF CONNECTIN-END FAILURE FOR BEARING PEDESTAL OF THE VALVE CONCERNING SEA-WATER PUMP OF UNIT NO.5[J]. Thermal power generation, 2006, (12): 62-63. DOI： 10.19666/j.rlfd.2006.12.020.

摘要

采用宏观检查、化学分析、金相检验、能谱分析和断口扫描等方法

对月亮湾燃机电厂5号机海水泵阀门轴承座失效原因进行分析。分析结果显示

失效主要为缝隙腐蚀引起的沿晶脆性断裂

对此提出了使用不吸湿的垫片或填料、轴承座边缘部位喷耐蚀涂层(?)刷防腐涂料

以及改变设计结构

避免出现缝隙及停滞区等措施。

Abstract

Adopting methods

such as macroscopic inspection

chemical analysis

metallographic examination

energy spectrum analysis

and fracture scanning etc.

the causes leading to bearing pedestal falure of the valve concerning seaweter pump of unit no. 5 have been analysed. It is believed that the main cause to be intercrystalline brittle fracture resulted from crevice corrosion. For this reason

some measures have been put forward

namely using non - hygroscopic gaskets or fillers; edges of the bearing pedestal to be sprayed with corrosion resistant coating or brushed with anticorrosive paint; changing designed structure to advoid crevice and stagnated regian

etc.

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Related Author

YAO Yiwen

Related Institution

Yong'an Thermal Power Plant, Fujian Yong'an

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