Effect of Manufacturing Processes on Blade Throat Size and Position in a Steam Turbine Diaphragm

Q2 Engineering

Journal of Machine Engineering Pub Date : 2022-06-12 DOI:10.36897/jme/150830

P. Eret, M. Hoznedl

引用次数: 1

Abstract

Despite a sustainable energy future, steam turbines are requisite for the reliability and security of the electric power supply in many countries. Accurate and precise manufacturing of the steam path is crucial to turbine efficiency. Before entering the rotor blades, the steam must be correctly guided using stationary blading in a diaphragm. Steam turbine diaphragms are complicated components to manufacture, and welding is the most common fabrication method. A case study presented in this paper employs data from a 3D optical scanner for a geometric deviation analysis of the upper half of the diaphragm at two production steps, after complete welding and after final machining. Unrolled cylinder cross-sections at different diameters are used to evaluate the blade throat sizes and positions compared to the nominal geometry. The results indicate significant geometric changes between the two fabrication steps, and several suggestions are put forward for targeted future work.

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制造工艺对汽轮机隔板叶片喉部尺寸和位置的影响

尽管未来的能源是可持续的，但在许多国家，蒸汽轮机对于电力供应的可靠性和安全性是必不可少的。蒸汽路径的精确制造对汽轮机的效率至关重要。在进入转子叶片之前，必须使用膜片中的固定叶片正确引导蒸汽。汽轮机膜片是制造复杂的部件，焊接是最常用的制造方法。在本文中提出的一个案例研究中，使用来自3D光学扫描仪的数据，在完成焊接和最终加工后的两个生产步骤中，对膜片上半部分进行几何偏差分析。不同直径的展开圆柱截面用于评估与标称几何形状相比的叶片喉道尺寸和位置。结果表明，两个加工步骤之间存在明显的几何变化，并对今后有针对性的工作提出了几点建议。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Journal of Machine Engineering Engineering-Industrial and Manufacturing Engineering

CiteScore

2.70

自引率

0.00%

发文量

审稿时长

25 weeks

期刊介绍： ournal of Machine Engineering is a scientific journal devoted to current issues of design and manufacturing - aided by innovative computer techniques and state-of-the-art computer systems - of products which meet the demands of the current global market. It favours solutions harmonizing with the up-to-date manufacturing strategies, the quality requirements and the needs of design, planning, scheduling and production process management. The Journal'' s subject matter also covers the design and operation of high efficient, precision, process machines. The Journal is a continuator of Machine Engineering Publisher for five years. The Journal appears quarterly, with a circulation of 100 copies, with each issue devoted entirely to a different topic. The papers are carefully selected and reviewed by distinguished world famous scientists and practitioners. The authors of the publications are eminent specialists from all over the world and Poland. Journal of Machine Engineering provides the best assistance to factories and universities. It enables factories to solve their difficult problems and manufacture good products at a low cost and fast rate. It enables educators to update their teaching and scientists to deepen their knowledge and pursue their research in the right direction.