Influence of Welding Deformation on Fatigue Life of Main Alternator Fan

MA Tao; YANG Liuqing; SANG Shang

doi:10.7512/j.issn.1001-2303.2023.06.11

Welding Technology | Views : 0 下载量: 3 CSCD: 0

PDF
Export
Share
Collection
Album

Influence of Welding Deformation on Fatigue Life of Main Alternator Fan
Vol. 53, Issue 6, Pages: 70-75(2023)
DOI： 10.7512/j.issn.1001-2303.2023.06.11

扫描看全文

马涛，杨柳青，桑尚.焊接变形对主发电机风扇疲劳寿命的影响分析［J］.电焊机，2023，53（6）：70-75.

MA Tao, YANG Liuqing, SANG Shang.Influence of Welding Deformation on Fatigue Life of Main Alternator Fan[J].Electric Welding Machine, 2023, 53(6): 70-75.
马涛，杨柳青，桑尚.焊接变形对主发电机风扇疲劳寿命的影响分析［J］.电焊机，2023，53（6）：70-75. DOI： 10.7512/j.issn.1001-2303.2023.06.11.

MA Tao, YANG Liuqing, SANG Shang.Influence of Welding Deformation on Fatigue Life of Main Alternator Fan[J].Electric Welding Machine, 2023, 53(6): 70-75. DOI： 10.7512/j.issn.1001-2303.2023.06.11.

摘要

某型内燃机车主发电机转子焊接风扇焊后变形量分散性大，为了研究焊接变形对风扇疲劳寿命的影响，对焊接风扇所属底板引起的不同变形量导致安装产生的装配应力进行测试，进而采用真实载荷谱对风扇进行疲劳试验，同时对比了三种通过改变焊接工艺来减小焊接变形的改进方案。研究结果表明：由焊接导致的风扇变形在安装过程中会产生装配应力，变形越大，装配应力越大，变形量与装配应力近似呈非线性关系；疲劳起裂源发生在风扇叶片焊趾处，底板焊接变形越大，叶片疲劳寿命越小；可通过防变形工装来控制风扇底板焊接变形量，底板焊接变形量小于0.35 mm时，可以满足其风扇设计寿命要求。

Abstract

The deformation of the welding fan of the main generator rotor of a certain type of diesel locomotive is dispersive after welding. In order to study the influence of welding deformation on the fatigue life of the fan, the assembly stress caused by the installation caused by different deformations of the floor of the welding fan is tested, and then the fatigue test of the fan is carried out by using the real load spectrum, three improved schemes to reduce welding deformation by changing welding process are compared. The results show that the fan deformation caused by welding will produce assembly stress in the installation process. The larger the deformation is, the larger the assembly stress is. The deformation is approximately nonlinear with the assembly stress. The fatigue fracture occurs at the weld toe of fan blade. The larger the welding deformation is, the smaller the fatigue life of blade is. Welding deformation can be controlled by anti-deformation tooling. When the welding deformation is less than 0.35 mm, it can meet the design life requirements.

关键词

焊接变形应力测试受力分析疲劳试验

Keywords

welding deformationstress testforce simulationfatigue test

references

俞树文，罗宇，赵晟，等.焊接残余应力及变形对各焊接结构动力特性的影响［J］.热加工工艺，2021，50（21）：140-145+151.

YU S W，LUO Y，ZHAO S，et al. Influence of Welding Residual Stress and Deformation on Dynamic Characteristics of Welding Structures［J］. Hot Working Technology，2021，50（21）：140-145+151.

兆文忠，李向伟，董平沙. 焊接结构抗疲劳设计理论与方法［M］. 机械工业出版社，2017.

周道传. 有限单元法原理与计算［M］. 北京：水利水电出版社，2020.

陈炳岐. LSR69B型冷却风扇的静强度和疲劳强度分析［D］. 辽宁：大连交通大学，2017.

CHEN B Q. Analysis of static strength and fatigue strength of LSR69B cooling fan［D］.Liaoning： Dalian Jiaotong University，2017

唐铃，尚柏林，高星伟，等.某型发动机风扇叶片复合疲劳试验加载系统的分析与测试［J］. 机械强度，2018，40（01）：61-67.

TANG L，SHANG B L，GAO X W，et al. Analysis and test of combined fatigue loading system of certain engine fan blade［J］.Journal of Mechanical Strength，2018，40（01）：61-67.

BS7608：2014+A1：2015.

Guide to fatigue design and assessment of steel products［S］. British：BSI，2015.

刘天奇，时新红，张建宇，等.平均应力对30CrMnSiA钢多轴疲劳失效的影响［J］. 航空动力学报，2018，33（12）：2972-2980.

LIU T Q，SHI X H，ZHANG J Y，et al. Effect of mean stress on multiaxial fatigue failure of 30CrMnSiA steel［J］. Journal of Aerospace Power，2018，33（12）：2972-2980.

李静，佟晓龙，杨烁，等.考虑平均应力的同频拉扭多轴高周疲劳寿命评价方法［J］. 力学学报， 2020， 52（05）：1409-1421.

LI J，TONG X L，YANG S，et al. A multiaxial high cycle fatigue life prediction model considering the effect fo mean stress for tension-torsion loading with same frequency［J］. Chinese Journal of Theoretical and Applied Mechanics，2020，52（05）：1409-1421.

吴宪，丁成钢. Q345E钢薄板小变形焊接工艺［J］.电焊机，2021，51（9）：50-54.

WU X，DING C G. Small deformation welding process of Q345E steel sheet［J］.Electric Welding Machine，2021，51（9）：50-54.

丁维民. 核电站钢制安全壳焊接变形控制［J］. 电焊机，2019，49（4）：173-179.

DING W M.Welding deformation control of nuclear power plant steel containment vessel［J］. Electric Welding Machine，2019，49（4）：173-179.

范祖和，马武福.牵引电机通风机叶轮叶片的断裂原因分析及设计改进［J］. 铁道机车车辆，2010，30（02）：50-52.

FAN Z H，MA W F. The Rupturing Reason Analysis for Impeller Vanes of Traction Motor Ventilator and Improvement of Impeller's Design［J］.Railway Locomotive & Car，2010，30（02）：50-52.

Alert me when the article has been cited

提交

Effect of Liquid Nitrogen Cooling on Microstructure, Residual Stress and Deformation of TC4 Titanium Alloy Laser Welding

Q235 Sheet Welding Deformation Analysis of the Experiment and Simulation

Research and Application of Narrow Gap Robot Welding Technology of Large Pumped Storage Unit Ball Valve

Deformation Control of FSW and MIG Welding of Aluminum Alloy Shell

Finite Element Analysis of Bottom Welds of High Strength Steel CO₂ Welding