振动环境下传动螺纹配合间隙对其自锁性的影响  

INFLUENCE OF SCREW DRIVE FIT CLEARANCE ON SELF-LOCKING ABILITY UNDER VIBRATING INSPIRATION

作　　者：杜一民 李志辉 贾学志[1,4] 李季 柯善良[1,2] DU YiMin;LI ZhiHui;JIA XueZhi;LIKE ShanLiang(Changchun Institute of Optics,Fine Mechanics and Physics,Chinese Academy of Sciences,Changchun 130033,China;University of Chinese Academy of Sciences,Beijing 100049,China;Armor Technique Institute of PLA,Changchun 130117,China;Chang Guang Satellite Technology Ltd.,Changchun 130033,China)

机构地区：[1]中国科学院长春光学精密机械及物理研究所,长春130033 [2]中国科学院大学,北京100039 [3]装甲兵技术学院,长春130117 [4]长光卫星技术有限公司,长春130033

出　　处：《机械强度》2019年第3期509-514,共6页Journal of Mechanical Strength

基　　金：国家重点研发计划项目(2016YFB0502602)资助~~

摘　　要：螺旋传动被广泛应用于空间相机调焦机构中,为了应对火箭发射中的冲击与振动要求其具有一定的锁止能力。建立螺纹配合间隙非线性两自由度简化力学模型,通过数值仿真方法得到了系统在振动环境下的响应,发现无量纲参数峭度指标可以作为评定螺纹自锁失效程度的标准。最后,通过有限元仿真分析验证了简化模型的正确性,证明了峭度指标在分析螺纹配合间隙对其自锁性影响的有效性。Screw drive is widely used in the focusing mechanisms in space cameras,and the self-locking ability is required to resist the shock and vibration in the process of launching.The paper establishes a non-linear simplified mechanical model of thread fit clearance with two degrees of freedom.The dynamic response of the system under the vibrating inspiration is achieved by numerical simulation method.The result shows that non-dimensional kurtosis indexes can be used as an indicator to evaluate the degree of self-locking failure of screw drive.Finally,The simplified model is verified by finite element simulation analysis,and it shows kurtosis indexes is effective to analyze the influence of thread fit clearance on self-locking ability.

关 键 词：螺旋传动 调焦机构 配合间隙 自锁 峭度指标 

分 类 号：V475.2[航空宇航科学与技术—飞行器设计]