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常州大学学报(自然科学版)[ISSN:2095-0411/CN:32-1822/N]

卷:

期数:

2010年03期

页码:

53-57

栏目:

机械制造及其自动化

出版日期:

2010-09-25

文章信息/Info

Title:

Fracture Analysis of Turbine Impeller

作者:

纪 熙;  魏安安

常州大学江苏省油气井口装备技术研究中心, 江苏 常州 213016

Author(s):

JI Xi;  WEI An- an

Jiang su Oil & Gas Well Head Equipment Technolog y Research Center, Chang zhou U niversity, Changzho u 213016, China

关键词:

透平机;  叶轮;  断裂;  超速

Keywords:

turbine;  impeller;  fracture;  speeding

分类号:

T Q 0511 3

文献标志码:

A

摘要:

透平机叶轮在装置大检修后刚开机就突然发生断裂。宏观检察发现轮盘断口上存在铸造缺陷, 经评定排除了铸造缺陷造 成断裂的可能。从断裂裂纹的位置、走向, 端口形貌, 自锁控制系统动作过程的分析得知, 由于管壁上有残留水会使介质中水 分增加, 从而引起叶轮超速, 在制动控制系统有误的情况下使叶轮不能按照正确程序停车, 造成叶轮超速进一步加剧, 产生过 高的离心力, 从而引起叶轮断裂, 是这次事故的真正原因。

Abstract:

T he turbine impeller w as f ractur ed suddenly w hen it started to w or k, af ter it w as ex amined carefully. Af ter Macro ex aminat ion, casting defects w ere found on roulet te; the cast ing defect s w ere assessed. T he r esult s show ed the defects may have caused the ruptur e. From the analy sis of f racture crack locat ion, direct ion, po rt shape, self- lo cking cont rol system w hich mo ved the process, it w as learned that the r emaining w ater left on the pipeline incr eased the moisture in the medium and csused the impeller to speed excessively. Because of an erro r pro gram in the cont ro l br eak system, the impeller could not stop in the correct pr ocedures, and the speed of impeller w as further accelerated. T he cent rifug al fo rce w as generated too high, so the high cent rifug al fo rce w as the real cause o f the f racture accident .

备注/Memo

备注/Memo:

作者简介: 纪熙( 1984- ) , 男, 江苏盐城人, 硕士研究生; 联系人: 魏安安。

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更新日期/Last Update: 2010-09-25