摘要
针对航空自锁螺母锁紧力矩衰减过快的问题,分析了螺纹连接松动的原因和防松措施。从自锁螺母的选材及热处理控制、螺母不同结构、锁紧区收口变形形式及变形量大小等方面研究了影响螺母锁紧性能和使用寿命的主要因素。结合航空自锁螺母典型结构及载荷工况要求,提出了优化设计结构及非金属嵌件自锁螺母新结构,并开展锁紧性能对比试验。试验结果表明,优化设计结构及非金属嵌件螺母新结构的应用提高了自锁螺母使用寿命,并实现了紧固件轻量化设计。
For damping too fast of locking torque of aero-engine self-locking nut, the causes of threaded joint＇ s looseness and the methods of anti-loosening were analyzed. The principal influence factors of locking performance and service life of self-locking nut were discussed, including material and heat treatment, different structures, the form and amount of lock area deformation. The optimization of structure design and non-metallic insert structure were introduced during typical structure of self-locking nut and different load conditions. And comparative test of locking performance were researched. The results show that service life of self-locking nut was improved by the application of optimization of structure design and non-metallic insert structure with light-weight design of self-locking nut.
出处
《航空科学技术》
2017年第4期68-74,共7页
Aeronautical Science & Technology
基金
航空科学基金(2014ZE08010)~~
关键词
自锁螺母
锁紧性能
使用寿命
设计优化
非金属嵌件结构
self-locking nut
locking performance
service life
optimal design
non-metallic insert structure
