Damage Mechanism Analysis of the Connecting Screw of Turbine Disk-Drum Assembly

IF 4.7 Q2 MATERIALS SCIENCE, BIOMATERIALS ACS Applied Bio Materials Pub Date : 2024-07-19 DOI:10.3390/machines12070489

Haijun Wang, Shengxu Wang, Pu Xue, Yongxin Guo, Liang Jiang

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Abstract

The turbine disk-drum is one of the key components of an aero-engine and its assembly is connected with high-strength refined screws. But due to the uncoordinated rotation and deformation, the screws have abnormal wear damage. Through detailed contact stress analysis of screw body and component level using the finite element method, combined with experimental observation, the mechanism of wear damage of screw surface in screws is determined. It mainly includes the following: Firstly, the finite element method is used to calculate the deformation and stress distribution of the connecting screw of the turbine disk-drum assembly. Then, after the overspeed test, the morphology of the screws disassembled from the disk-drum assembly is evaluated. It was found that the wear degree in the circumferential direction and axial direction of the screw was quite different, that is, the screw wear experiment was consistent with the finite element analysis results. Finally, the influence of different rotation states and screw tightening states on screw wear was compared and analyzed. Conclusions obtained in this paper will be helpful to improve the assembly reliability of turbine drum.

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涡轮机盘鼓组件连接螺杆的损伤机理分析

涡轮盘鼓是航空发动机的关键部件之一，其装配采用高强度精制螺杆连接。但由于不协调的旋转和变形，螺杆出现了异常磨损损坏。通过使用有限元法对螺杆本体和组件层面进行详细的接触应力分析，并结合实验观察，确定了螺杆中螺杆表面的磨损损伤机理。主要包括以下几个方面：首先，采用有限元法计算涡轮盘鼓组件连接螺杆的变形和应力分布。然后，在超速试验后，对从盘-鼓组件上拆卸下来的螺杆的形态进行评估。结果发现，螺杆圆周方向和轴向的磨损程度大不相同，即螺杆磨损实验与有限元分析结果一致。最后，比较分析了不同旋转状态和螺钉拧紧状态对螺钉磨损的影响。本文得出的结论将有助于提高涡轮滚筒的装配可靠性。

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来源期刊

ACS Applied Bio Materials Chemistry-Chemistry (all)

CiteScore

9.40

自引率

2.10%

发文量

464

期刊介绍： ACS Applied Bio Materials is an interdisciplinary journal publishing original research covering all aspects of biomaterials and biointerfaces including and beyond the traditional biosensing, biomedical and therapeutic applications. The journal is devoted to reports of new and original experimental and theoretical research of an applied nature that integrates knowledge in the areas of materials, engineering, physics, bioscience, and chemistry into important bio applications. The journal is specifically interested in work that addresses the relationship between structure and function and assesses the stability and degradation of materials under relevant environmental and biological conditions.