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本文分析了旋翼轴颈故障断口及轴颈受力状态后,采用在PBV卧式程控疲劳试验机上附加一个对试件沿轴向施加静态拉伸负荷的液压加力装置,对新件、旧件及旧件经喷丸的三组不同状态的轴颈进行了拉弯组合载荷作用下的元件疲劳试验。用t检验方法对三组轴颈疲劳寿命的显著性检验结果表明,采用轴颈螺纹部分喷玻璃丸的工艺可以提高轴颈的疲劳寿命1.13～10.14倍。此外,作者还通过对轴颈断口的宏观和电子扫描观察分析表明,试验件靳口基本上再现了故障件断口;喷丸轴颈的疲劳裂纹产生于轴颈表皮下面,从而导致了疲劳寿命的提高。
This paper analyzes the rotor shaft fracture and neck shaft fracture state, the use of PBV horizontal program-controlled fatigue testing machine attached to the specimen along the axial load exertion static tensile force of the hydraulic device, the new pieces of old And old parts by shot peening of three different states of the journal under tension and bending load fatigue component test. The test results of t-test on the fatigue life of three groups of journal showed that the use of journal-threaded part of the process of spraying glass pills can improve the fatigue life of the journal 1.13 ~ 10.14 times. In addition, the author also through the macroscopic and electronic scanning of the journal fracture analysis showed that the test piece Jin mouth basically reproduce the fault fracture; shot peening fatigue cracks occur in the journal epidermis, resulting in fatigue life improve.