斯特林制冷机渐开线型中涡旋柔性弹簧强度研究

Strength study on spiral flexure spring based involute curve of Stirling cryocooler

建立渐开线型涡旋柔性弹簧的力学模型,在此基础上采用有限元法建立弹簧的强度仿真模型,以位移方式加载模拟,研究弹簧在实际工况下的变形与受力状况,确定弹簧的强度分布与极限。研究表明涡旋柔性弹簧最大应力发生在涡旋臂根部,选取合适的型线结构以及弹簧材料,可以使得弹簧满足工作强度要求。最后,采用弹簧工作状态下应变实验对仿真模型结果进行验证,二者结果具有一致性。结果表明,建立的涡旋柔性弹簧有限元模型准确,研究方法有效,结果可信。

Mechanics model of involute spiral flexure spring was established. The finite element method was adopted to establish the strength simulation model. Through the displacement loading method,it was studied that the deformation and stress of the spring under the actual work condition. Then it was determined that the strength distribution and limitation. Studies have shown that the maximum working stress occurred in the root of spiral arms. Proper type line structure and spring material can be selected to satisfy the intensity of work performance requirements. Finally,the spring strain experiment under the working state is used to validate the simulation model and the results are consistent. The results show that the finite element model of spiral flexure spring is accurate,research method is effective and results are believable.