| Innovative Design |
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| Structure and fatigue life analysis of damping type tripod universal joint |
| LI Song-mei, ZHENG Zhe, LI Shuai-shuai, CHANG De-gong |
| College of Electromechanical Engineering, Qingdao University of Science and Technology, Qingdao 266061, China |
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Abstract In order to improve the operational reliability of the tripod universal joint in the power transmission system, according to the periodic variation of radial load and axial load on the slider assembly of the tripod universal joint, a rubber damping type tripod universal joint was designed and its life was predicted. Based on the nominal stress method, the S-N curve of the fluororubber material was obtained by the test, and the fatigue life of the damping structure was analyzed. It was found that the minimum number of fatigue cycles for the damping type tripod universal joint was 5.88×106, which appeared at the position of the fluororubber damping element. According to the relationship between the mileage and the number of cycles, the life expectancy of the damping type tripod universal joint was about 1.47×106 km. The study results can provide a theoretical basis for the regular maintenance and replacement of joints in the application.
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Received: 30 November 2018
Published: 28 October 2019
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减振型三叉式万向联轴器结构及其疲劳寿命分析
为了提高动力传动系统中三叉式万向联轴器的工作可靠性，根据三叉式万向联轴器工作时滑块组件上存在的周期性变化的径向载荷和轴向载荷，设计了橡胶减振型三叉式万向联轴器新型结构，并对其寿命进行预测。采用名义应力法，通过试验获得氟橡胶材料的S—N曲线，并对减振结构进行疲劳寿命有限元分析。结果表明减振型三叉式万向联轴器的最小疲劳循环次数为5.88×106 次，出现在氟橡胶减振元件处；由减振型万向联轴器运行的里程与循环次数的关系确定其寿命约为1.47×106 km。研究结果可为联轴器在应用过程中的定期维修与更换提供理论依据。
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