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| Random Vibration Running-in Method of a Micro-gear Mechanism |
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| DOI：10.7643/issn.1672-9242.2023.03.013 |
| KeyWord:random vibration running-in method orthogonal test friction behavior delay time micro-gear mechanism |
| Author | Institution |
| YU Qi-hang |
Tribology Research Institute, Southwest Jiaotong University, Chengdu , China |
| LI Yan |
DEC Academy of Science and Technology Co., Ltd., Chengdu , China |
| PENG Xue-feng |
Tribology Research Institute, Southwest Jiaotong University, Chengdu , China |
| GENG Shao-yin |
Tribology Research Institute, Southwest Jiaotong University, Chengdu , China |
| CAI Zhen-bing |
Tribology Research Institute, Southwest Jiaotong University, Chengdu , China |
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| Abstract: |
| The work aims to optimize the interface performance of friction pair of micro-gear mechanism by running-in to improve its service durability to solve the problem of short service life of micro-gear mechanism in random vibration environment. In this work, the orthogonal experiment method was used to study the vibration time and the random vibration energy in the OX and OZ directions to carry out running-in test of the micro-gear mechanism. In order to verify the running-in effect of different parameter combinations, a vibration load spectrum verification test under standard operating conditions was designed. The delay time change before and after the test was used as the basis for judging the running-in effect, and the wear degree of the micro-gear mechanism was judged according to the surface wear area of the balance pin. Through statistical analysis, the influence trend of each factor on the running-in effect and the optimal parameters were obtained. The experimental results showed that the primary and secondary effects of various factors on the running-in effect were:vibration time > random vibration value in the OZ direction > random vibration value in the OX direction. With the increase of the vibration time and the vibration energy in the OZ direction, the variation of the delay time appeared to a minimum value and the growth rate of the wear area of the balance pin tended to slow down. By observing the surface interface, it was found that the vibration in the OZ direction caused abrasive wear on the surface, which was conducive to the running-in of the surface interface, while the vibration energy in the OX direction had no significant effect on the running-in effect. The optimal combination of running-in parameters is obtained by range analysis on change of delay time:the vibration time is 450 minutes, and the equivalent energy of random vibration in the OX and OZ directions is 6.79g and 15.17g, respectively. |
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