| 发动机启动发电机弹性轴断裂分析 |
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| 引用本文： | 胡春燕,李莹,陶春虎,黎明,刘新灵. 发动机启动发电机弹性轴断裂分析[J]. 理化检验(物理分册), 2009, 0(7): 448-450 |
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| 作者姓名： | 胡春燕 李莹 陶春虎 黎明 刘新灵 |
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| 作者单位： | 北京航空材料研究院;南昌航空大学无损检测技术教育部重点实验室; |
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| 基金项目： | 无损检测技术教育部重点实验室开放基金(ZD200729011) |
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| 摘 要： | 通过硬度检验、断口分析和金相检验等方法，确认断裂的发动机启动发电机弹性轴为扭转疲劳断裂失效，弹性轴锥体和衬套间配合松动导致的反复冲击是其断裂失效的关键因素，键槽设计的深度较大和加工质量粗糙进一步增大了转角处的应力水平，促进了裂纹萌生。
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| 关 键 词： | 弹性轴 冲击栽荷 扭转疲劳 键槽结构 |
Fracture Analysis of Flexible Shaft of Engine Starter-generator |
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| HU Chun-yan,LI Ying,TAO Chun-hu,LI Ming,LIU Xin-ling. Fracture Analysis of Flexible Shaft of Engine Starter-generator[J]. Physical Testing and Chemical Analysis Part A:Physical Testing, 2009, 0(7): 448-450 |
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| Authors: | HU Chun-yan LI Ying TAO Chun-hu LI Ming LIU Xin-ling |
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| Affiliation: | 1.Beijing Institute of Aeronautical Materials;Beijing 100095;China;2.Key Laboratory of Nondestructive Test of Chinese Ministry of Education;Nanchang Hangkong University;Nanchang 330063;China |
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| Abstract: | The flexible shaft of engine starter-generator was analyzed through hardness test,fracture analysis and metallography examination.The results showed that the fracture mode of the flexible shaft was torsion fatigue.The iterative impact load which was mainly due to the flexible shaft cone and bush cone cooperate become flexible was the key factor.The stress lever of striking angle was more increased because of keyslot configuration and machining quality which accelerate initiation of crack. |
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| Keywords: | flexible shaft impact load torsion fatigue keyslot configuration |
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