陈一凡,吴天行.重载螺旋压缩弹簧轴向和径向承载性能分析[J].有色金属工程,2018,8(3):.
重载螺旋压缩弹簧轴向和径向承载性能分析
Study on Axial and Radial Bearing Behavior of Heavy Helical Compression Spring
投稿时间:2017-05-02  修订日期:2017-06-20
DOI:
中文关键词:  螺旋压缩弹簧  重载  轴向刚度  径向刚度  切应力
英文关键词:helical compression springs  heavy load  axial stiffness  radial stiffness  shearing stress
基金项目:
     
作者单位
陈一凡 上海交通大学机械与动力工程学院
吴天行 上海交通大学
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中文摘要:
      重载螺旋压缩弹簧常用于大载荷矿山机械的振动控制系统中。由于其几何结构的不对称性,容易发生弯曲变形,造成系统发生横向振动,甚至导致系统失效。本文采用有限元方法数值分析了这类弹簧在轴向和径向载荷作用下的刚度和最大切应力。结果表明,采用螺旋压缩弹簧的经典理论公式计算重载弹簧的刚度和应力会产生较大误差。其中弹簧的轴向刚度不应忽略并紧圈变形所产生的影响,而在轴向载荷作用下的最大切应力则会受到轴向载荷偏心的影响,且与偏心的方向有关。弹簧在轴向和径向载荷共同作用下的径向刚度与径向载荷作用点位置有关。因此在实际使用中,必须选择合理的弹簧安装方式。
英文摘要:
      Due to the asymmetry geometry of the heavy helical compression springs used in vibration control systems of large load mining machinery, the bending deformation of these springs can be found easily. It can lead to transverse vibration and even failure of the system. The axial and radial stiffness and maximum shearing stress of the heavy spring under axial and radial load were simulated using the finite element method in this paper. The results showed that classical theoretical formulas of helical compression springs will result in a major error for the heavy spring. The influence of its tight ends deformation on the axial stiffness of the spring cannot be ignored, and the maximum shearing stress of the spring under axial load is relative to the eccentricity of the axial load and its direction of the eccentricity. The radial stiffness of the spring under axial and radial load varies according to the radial loading position. Thus the assembly mode of the heavy spring must be considered in practical use.
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