LUO Hongjian, ZHOU Chonghui, ZHAO Zhoufeng Electric Power Science Institute of Zhejiang Electric Power Company. Heating pipe leakage in cylinder of a 600 MW unit turbine:reason analysis and treatment[J]. Thermal power generation, 2013, 42(5): 102-103.
LUO Hongjian, ZHOU Chonghui, ZHAO Zhoufeng Electric Power Science Institute of Zhejiang Electric Power Company. Heating pipe leakage in cylinder of a 600 MW unit turbine:reason analysis and treatment[J]. Thermal power generation, 2013, 42(5): 102-103.DOI:
600MW机组高压缸暖管泄漏原因分析及处理
摘要
某600MW机组高压缸暖管频繁发生泄漏
通过管道应力分析指出管道的二次应力过大是导致管道失效的主要原因。由于暖管的支吊架以刚性吊架为主
且接管座处的大小头设计不合理
造成大小头连接处二次应力超标。将暖管的刚性吊架更换为弹性吊架
接管座处的大小头设计为圆滑过渡
避免了应力集中。
Abstract
Leakage occurred on warm tubes of high pressure cylinder of a 600 MW unit turbine frequently.By pipeline stress analysis
the over large secondary stress on the pipe was considered as the major reason causing the pipe failure.The warm tube supports and hangers are mainly rigid and the design of the reducer at pipe connection is unreasonable
leading to overproof of secondary stress on the reducer connection joint.To avoid the stress concentration
the rigid supports and hangers should be better replaced by the resilient ones
and the reducer at the pipe connection joint should be designed in smooth transition.