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本文利用通常的三维光弹性实验技术和原理,对超短齿双圆弧齿轮进行了齿廓的应力分析。在实验中,专门设计了啮合位置可调的“摸拟啮合冻结试验装置”,使得模型齿轮在加载冻结过程中更真实妥贴的达到理想啮合受载,从而保证了实验结果的精确性。从对齿高参数不同的几种齿形进行探讨与实验表明,各种齿形上的应力分布规律大致相同,但齿根部位的最大应力值与位置则与所采用的齿形有关,且主要取决于齿高。本文就超短齿(h=1.4M_n)进行了三维应力分析得到了沿齿廓的应力分布,从而为它应用于低速重载齿轮传动的最佳齿形设计提供了可靠的实验依据。
In this paper, the common three-dimensional photoelasticity experiment technique and principle are used to analyze the tooth profile of ultra-short double circular arc gears. In the experiment, we specially designed a “simulate intermeshing freeze test device” with adjustable intermeshing position to make the model gear reach the ideal meshing load more exactly and reliably during the loading and freezing process, so as to ensure the accuracy of experimental results. The discussion and experiments of several tooth profiles with different tooth height parameters show that the stress distributions on various tooth profiles are roughly the same, but the maximum stress value and location of tooth root are related to the profile of the tooth used, and the main Depends on tooth height. In this paper, the stress distribution along the tooth profile of the ultrashort tooth (h = 1.4M_n) is obtained by 3D stress analysis, which provides a reliable experimental basis for the optimal tooth profile design for low speed and heavy load gear transmission.