CAUSE ANALYSIS OF CRACKS OCCURRED ON LAST STAGE IMPELLER AND DIAPHRAGM OF C12-3.43/0.981 TYPE STEAM TURBINE

doi:10.19666/j.rlfd.2005.05.014

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CAUSE ANALYSIS OF CRACKS OCCURRED ON LAST STAGE IMPELLER AND DIAPHRAGM OF C12-3.43/0.981 TYPE STEAM TURBINE

Thermal Power Generation Issue 5, Pages: 45-46(2005)

更新时间：2025-09-28

- CAUSE ANALYSIS OF CRACKS OCCURRED ON LAST STAGE IMPELLER AND DIAPHRAGM OF C12-3.43/0.981 TYPE STEAM TURBINE
- 作者机构：
  
  1. 西安热工研究院有限公司
  2. 华能鹤岗发电有限公司
  3. 华能鹤岗发电有限公司,陕西,西安,710032
  4. ,黑龙江,鹤岗,154109
- 作者简介：
- 基金信息：
- DOI：10.19666/j.rlfd.2005.05.014
  CLC： TK269
- Published：2005
- 稿件说明：
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CAUSE ANALYSIS OF CRACKS OCCURRED ON LAST STAGE IMPELLER AND DIAPHRAGM OF C12-3.43/0.981 TYPE STEAM TURBINE[J]. Thermal Power Generation, 2005, (5): 45-46.
DOI：

CAUSE ANALYSIS OF CRACKS OCCURRED ON LAST STAGE IMPELLER AND DIAPHRAGM OF C12-3.43/0.981 TYPE STEAM TURBINE[J]. Thermal Power Generation, 2005, (5): 45-46. DOI： 10.19666/j.rlfd.2005.05.014.

摘要

介绍了某热电厂C12-3.43/0.981型汽轮机末级叶轮和末级隔板径向裂纹的检查情况

并对裂纹产生的原因进行了分析。分析认为

裂纹的产生是由于设计、制造、安装及运行等原因造成末级叶轮、隔板间隙不当

导致叶轮、隔板发生碰磨而产生高温和较大的径向应力所致。

Abstract

The situation of inspecting cracks occurred on last stage impeller and on last stage diaphragm of C123.43/0.981 type steam turbine in one thermal power plant has been presented

and caues leading to occurrence of said cracks being analysed. It is believed that the occurrence of cracks had been resulted from such reasons as in aspects of design

fabrication

installation

and operation etc.

making improper gap between last stage impeller and diaphragm

resulting in high temperature and large radial stress. This result has practical significance of making use for reference in engineering practice.

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