STUDY ON DETECTION METHOD OF FIR-TREE BLADE ROOT ASSEMBLED ALONG AXIAL DIRECTION OF THE STEAM TURBINE

GAO Lei1; LI Zhifa2; XUE Kaifeng1 1.Xi'an Thermal Power Research Institute Co Ltd

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STUDY ON DETECTION METHOD OF FIR-TREE BLADE ROOT ASSEMBLED ALONG AXIAL DIRECTION OF THE STEAM TURBINE

更新时间：2025-09-28

- STUDY ON DETECTION METHOD OF FIR-TREE BLADE ROOT ASSEMBLED ALONG AXIAL DIRECTION OF THE STEAM TURBINE
- Thermal Power Generation Vol. 41, Issue 2, Pages: 76-78(2012)
- 作者机构：
  
  1. 西安热工研究院有限公司
  2. 华能重庆珞璜发电有限责任公司
- 作者简介：
- 基金信息：
- DOI：
  CLC： TK266
- Published：2012
- 稿件说明：
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GAO Lei1, LI Zhifa2, XUE Kaifeng1 1.Xi'an Thermal Power Research Institute Co Ltd. STUDY ON DETECTION METHOD OF FIR-TREE BLADE ROOT ASSEMBLED ALONG AXIAL DIRECTION OF THE STEAM TURBINE[J]. Thermal power generation, 2012, 41(2): 76-78.
DOI：

GAO Lei1, LI Zhifa2, XUE Kaifeng1 1.Xi'an Thermal Power Research Institute Co Ltd. STUDY ON DETECTION METHOD OF FIR-TREE BLADE ROOT ASSEMBLED ALONG AXIAL DIRECTION OF THE STEAM TURBINE[J]. Thermal power generation, 2012, 41(2): 76-78. DOI：

摘要

采用渗透、超声表面波、磁粉等检测方法对某台汽轮机轴向装配枞树型叶根进行检测

并对以上3种方法进行了比较。结果表明

磁粉检测的磁痕部位缺陷与超声表面波检测的结果完全一致

即在叶根出汽侧第1齿存在长15mm的未开口裂纹。由于磁粉检测不易操作

建议汽轮机轴向装配枞树型叶根的检验方法以超声表面波检测为主

磁粉检测和渗透检测共同验证和配合。

Abstract

By using the dye penetrating method

the ultrasonic surface wave method

and the magnetic particle method

the fir-tree blade roots assembled along axial direction of one steam turbine has been detected

and the said three methods being compared.Results show that the displayed location of magnetic particle detected defects is fully consistent with the detected result of using the ultrasonic surface wave method

a non-opened crack with length of 15 mm has appeared on the first tooth at steam side of N155 blade root

but no defects have been discovered by the dye penetrating detection.Hence

the fir-tree blade root assembled along axial direction of the steam turbine should take the ultrasonic surface wave detection as the dominent method

and using the magnetic particle detection and the dye penetrating detection for verification and cooperation.

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