摘要
为了解决螺栓连接松动失效问题,基于自主研制的航空用自锁螺栓,开展锁紧涂层对自锁螺栓锁紧性能影响的研究,探究涂层材料为二硫化钼(MoS2)、尼龙11(PA11)和聚氯乙烯(PVC)时螺栓的锁紧效果。在探究螺栓连接松动机理的基础上,引入螺纹表面涂层以增大螺纹副间的摩擦因数,提高锁紧性能。采用有限元方法,通过建立螺纹轮廓数学模型,精确网格划分和边界条件载荷设定等,对三种航空用锁紧涂层材料的自锁螺栓锁紧力矩进行了仿真分析,并选择其中的一种材料进行了台架试验验证。结果表明:有限元仿真时,锁紧涂层材料为MoS2、PA11和PVC,锁紧力矩平均值分别为1.06 N·m、1.95 N·m和2.18 N·m, PA11材料作为涂层时,更接近美标IFI524中最大锁紧力矩小于等于2.05 N·m的要求;台架试验验证涂层材料为PA11的锁紧螺栓锁紧力矩平均值为1.82 N·m,与仿真分析值相比在合理的波动范围内,PA11作为涂层材料满足实际生产需求。
In order to solve the problem of bolt loosening and failure, based on self-developed aviation self-locking bolts, the influence of locking coating on locking performance of self-locking bolts was studied, and the locking effect of bolts with molybdenum disulfide(MoS2), nylon 11(PA11) and polyvinyl chloride(PVC) coating materials was explored. Bolt connection locking mechanism are analyzed in this paper, by using the method of finite element simulation analysis and experimental verification, the air with the self-locking bolt lock the simulation and experimental research of the coating material selection, the mathematical model of the thread contour complete accurate set finite element meshing, boundary conditions, load simulation, experimental verification and test bench.The results show that the average locking torque of MoS2, PA11 and PVC is 1.06 N·m, 1.95 N·m and 2.18 N·m respectively in the finite element simulation. When PA11 is used as the coating, it is closer to the requirement that the maximum locking torque is less than or equal to 2.05 N·m in American standard IFI524. The bench test verifies that the average locking torque of the locking bolt with PA11 coating material is 1.82 N·m. Compared with the value of simulation analysis, it is within a reasonable fluctuation range, and PA11 as the coating material can meet the actual production requirements.
作者
刘本领
吴保全
张涛
林忠亮
柴金宝
王洪飞
白清顺
LIU BenLing;WU BaoQuan;ZHANG Tao;LIN ZhongLiang;CHAI JinBao;WANG HongFei;BAI QingShun(Aerospace Precision Products Co.,Ltd.,Tianjin 300300,China;School of Mechatronics Engineering,Harbin Institute of Technology,Harbin 150001,China;The Second Military Representative Ojfice of Air Force Armament Department in Tianjin,Tianjin 300300,China)
出处
《机械强度》
CAS
CSCD
北大核心
2023年第1期244-249,共6页
Journal of Mechanical Strength
基金
国家自然科学基金项目(52075129)资助。
关键词
自锁螺栓
涂层材料
数值模拟
锁紧力矩
Self-locking bolt
Coating material
Numerical simulation
Locking torque
