收口量对自锁螺母自锁力矩和防松性能的影响研究  

Study on the Influence of Closing Amount on Self-Locking Torque and Anti-Locking Performance of Self-Locking Nut

作　　者：潘祥 杨永真 石玉红 丁晓宇[3] PAN Xiang;YANG Yongzhen;SHI Yuhong;DING Xiaoyu(Beijing Institute of Radio Measurement,Beijing 100854,China;Beijing Institute of Aerospace Systems Engineering,Beijing 100076,China;School of Mechanical Engineering,Beijing Institute of Technology,Beijing 100081,China)

机构地区：[1]北京无线电测量研究所,北京100854 [2]北京宇航系统工程研究所,北京100076 [3]北京理工大学机械与车辆学院,北京100081

出　　处：《宇航总体技术》2024年第5期39-45,共7页Astronautical Systems Engineering Technology

基　　金：国家自然科学基金“叶企孙”科学基金项目(U2141217)。

摘　　要：自锁螺母是航空航天领域常用的紧固件,防松性能是其重要的技术指标。目前缺少对收口量与防松性能之间关系的深入研究。建立了包含收口过程、装配过程和松动过程的自锁螺母防松性能仿真分析方法,并以航天MJ10规格自锁螺母为对象,进行收口量对自锁力矩和防松性能的影响研究。结果表明,收口量在0~300μm时,自锁力矩随着收口量的增大而增大,即收口量越大自锁螺母的自锁力矩也越大。收口量不超过250μm时,收口量越大预紧力衰减速率越小;收口量超过250μm时,收口量越大预紧力衰减速率越大,即在一定范围内,收口量越大自锁螺母的防松性能也越好,但是当收口量超过某一值后,自锁螺母的防松性能反而下降,并非收口量和自锁力矩越大,自锁螺母的防松性能越好。可以为紧固件制造企业优化自锁螺母收口量提供参考。Self-locking nut is a common fastener in aerospace field,and its anti-loosening performance is an important technical index.At present,there is a lack of in-depth research on the relationship between closure quantity and anti-loosening performance.A simulation analysis method for the locking performance of self-locking nuts including closing process,assembly process and loosening process was established.The effect of closing amount on the locking torque and locking performance of self-locking nuts of aerospace MJ10 specification was studied.The results show that the self-locking torque increases with the increase of the closing amount when the closing amount is between 0 and 300μm,that is,the self-locking torque of the self-locking nut increases with the closing amount.When the closing amount is less than 250μm,the preload attenuation rate decreases with the closing amount increasing.When the closing amount exceeds 250μm,the larger the closing amount,the greater the preload decay rate,that is,within a certain range,the larger the closing amount,the better the anti-loosening performance of the self-locking nut,but when the closing amount exceeds a certain value,the anti-loosening performance of the self-locking nut decreases,not the larger the closing amount and self-locking torque,the better the anti-loosening performance of the self-locking nut.The research in this paper can provide reference for fastener manufacturing enterprises to optimize the closing amount of self-locking nuts.

关 键 词：自锁螺母 收口量 自锁力矩 防松性能 

分 类 号：V465[航空宇航科学与技术—航空宇航制造工程]