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平面有限元计算和平面光弹性试验,用于新齿形的分析比较,是简捷而有效的方法。但对于计算轮齿的真实应力,则具有较大的近似性。而三维光弹性试验,则可对轮齿的真实应力作进一步的探讨,并能得到沿全齿宽的应力分布规律,从而为双圆弧齿轮承载能力的设计计算提供更确切的试验依据。本试验只研究了FSPH—75型齿轮的轮齿周边应力,特别是根部应力状态,并与平面光弹性试验结果和有限元计算作了比较。一、试验模型和加载装置 1、齿轮试件为了制作方便,采用机加工的方法制造模型,模型与原型(实际齿轮)的尺寸比为1:1,这样可以很方便地选用制作实际齿轮的刀具(滚刀)来加工试验模型,毛坯为图柱形的实心体,直径110mm,高度为55
Planar finite element calculation and plane photoelasticity test are very simple and effective for the analysis and comparison of new tooth profiles. However, for calculating the true stress of gear teeth, it has a larger approximation. The three-dimensional photoelasticity test can further probe the true stress of gear teeth and obtain the law of stress distribution along the entire tooth width, so as to provide a more accurate test basis for the design and calculation of the carrying capacity of the double circular arc gear. In this study, only the stress around the gear tooth, especially the root stress state, of the FSPH-75 gear was studied and compared with the results of the plane photoelastic test and the finite element calculation. First, the test model and the loading device 1, the gear specimen for the convenience of making, the use of machining methods to create the model, the prototype and the prototype (actual gear) size ratio of 1: 1, so you can easily choose the actual gear manufacturing tool (Hob) to process the test model, the blank is a solid cylinder with a diameter of 110 mm and a height of 55