Abstract

The results of experimental studies of the possibility of using strain gauges under local pulsed thermal loading to evaluate the tension of the press connections of bearing rings with shafts are presented. Samples of press-fit joints in the range from 38 to 118 μm were prepared. As a result of the study of the patterns of heat flow propagation in bearing rings and tension samples by contact method and by means of thermal imaging, the possibility of separating strains associated with the influence of temperature on the strain measurement area and the temperature gradient in the heating area is shown. The methods of inspecting a press joint exposed to a heater ring with a heat power capacity of 80 kJ and a temperature of 200°C and measuring the strains of the ring and shaft by an opto-polarizing sensor with a base of 60 mm and a resolution of \(2 \times {{10}^{{ - 7}}}\) relative deformation units have been experimentally implemented. A correlation has been established between the time of reaching the maximum of local strains in the shaft with the tightness of the press joints and of the sign of strains in the bearing ring with a press fit leak with the gap between the ring and the shaft.

中文翻译：

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基于局部热载荷下变形模式分析的压接接头检测

摘要

提出了在局部脉冲热载荷下使用应变仪来评估轴承套圈与轴压接连接张力的可能性的实验研究结果。制备了 38 至 118 μm 范围内的压配合接头样品。通过接触法和热成像研究轴承套圈和拉伸样品中的热流传播模式，分离与温度对应变测量区域和温度梯度影响相关的应变的可能性。显示加热区域。检查暴露在热功率为 80 kJ、温度为 200°C 的加热环上的压接接头，并通过底座为 60 mm 的光偏振传感器测量环和轴的应变。\(2 \times {{10}^{{ - 7}}}\)相对变形单位的分辨率已通过实验实现。轴中达到最大局部应变的时间与压接接头的紧密度以及轴承套圈中的应变符号与压配合泄漏与套圈和轴之间的间隙之间建立了相关性。