螺纹连接在横向振动或冲击作用下自动旋转松动的原因及防松  

Reasons for Auto-rotation Loosening of Threaded Connection Under the Action of Transverse Vibration or Impact and Anti-loosening

作　　者：许松林 XU Songlin(Zhangjiagang Jiangsu 215600,China)

机构地区：[1]江苏张家港215600

出　　处：《机械设计与研究》2024年第6期88-96,共9页Machine Design And Research

摘　　要：由于螺纹连接在横向振动或冲击作用下自动旋转松动的原因不明确,在螺纹连接防松结构的设计、选用以及防松性能测试等方面存在一些误区,为了明确该原因,利用软件SOLIDWORKS 2022以M16右旋螺纹螺纹连接模型为例对普通螺纹连接和双螺母防松、新防松技术Ⅰ、Ⅱ的防松结构进行了横向振动试验有限元模拟和分析,同时对尼龙锁紧螺母防松和弹簧垫圈防松的防松结构进行了理论分析,从而得出以下结论:螺纹连接在横向振动或冲击作用下的自动旋转松动是内、外螺纹件之间的滚动运动,因此,螺纹连接防松需要解决的首要技术问题是通过何种螺纹连接的结构和方式有效防止在内、外螺纹件之间产生相对横向位移和螺纹件做滚动运动的空间;当螺纹连接的结构不能有效防止在内、外螺纹件之间产生螺纹件做滚动运动的空间时增加防松摩擦力,其防松效果是有限的;螺纹连接的防松性能测试,应根据螺纹连接的结构和防松机理选择和设计合理的试验方法。Due to the unclear reasons for loosening of threaded connection under the action of transverse vibration or impact,there are some misconceptions in the design,selection,and anti-loosening performance testing of threaded connection anti-loosening structures,etc.In order to clarify these reasons,SOLIDWORKS software is used to conduct finite element simulation and analyze the transverse vibration tests of ordinary threaded connection,anti-loosening structures of double nut anti-loosening and new anti-loosening technologiesⅠandⅡusing the M16 right-handed threaded connection models as an example.Theoretical analysis is conducted on the anti-loosening structures of nylon lock nut anti-loosening and spring washer anti-loosening.The loosening of the threaded connection under the action of transverse vibration or impact is in fact the rolling motion between the internal and external threaded parts.Therefore,the primary technical problem that the anti-loosening of threaded connection needs to solve is to determine the structure and method of threaded connection to effectively prevent the relative lateral motion and limit the space that the threaded part do rolling motion between the internal and external threaded parts.When the structure of the threaded connection cannot effectively limit the space that the threaded part do rolling motion between the internal and external threaded parts,increasing the anti-loosening friction force is not effective.For the anti-loosening performance test of threaded connection,a reasonable test method should be selected and designed according to the structure and anti-loosening principle of the threaded connection.

关 键 词：螺纹 振动 冲击 松动 防松 

分 类 号：TH131.3[机械工程—机械制造及自动化]