| YU Ying-hua,YANg，Shuai-bin,CAO Mao-lin,SHEN Jia-xing,RUAN Wen-xin.Elliptic Bias Parabolic Micro-texture of Sliding Bearing Surface[J],51(9):131-140, 167 |
| Elliptic Bias Parabolic Micro-texture of Sliding Bearing Surface |
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| DOI：10.16490/j.cnki.issn.1001-3660.2022.09.013 |
| KeyWord:sliding bearing load carrying capacity friction coefficient elliptic bias parabolic micro-texture gray correlation response surface analysis optimal design |
| Author | Institution |
| YU Ying-hua |
School of Mechanical Engineering, Liaoning Fuxin , China |
| YANg，Shuai-bin |
School of Mechanical Engineering, Liaoning Fuxin , China |
| CAO Mao-lin |
Shanxi Aerospace Tsinghua Equipment Co., LTD, Shanxi Changzhi , China |
| SHEN Jia-xing |
School of Mechanical Engineering, Liaoning Fuxin , China ;Research Institute of Technology and Equipment for the Exploitation and Utilization of Mineral Resources, Liaoning Technical University, Liaoning Fuxin , China |
| RUAN Wen-xin |
School of Mechanical Engineering, Liaoning Fuxin , China |
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| Abstract: |
| Surface texture technology is to process nano micro texture with specific shape and size and special arrangement on the moving friction surface according to people's will by mechanical processing, chemical or physical methods. In this paper, the effect of elliptic opening bias parabolic microtexture on bearing capacity and friction and wear resistance of plain bearing and its multi-objective parameter optimization are studied. A four-factor and five-level orthogonal experimental table was established, and Workbench software was used to analyze the bearing capacity and friction coefficient of sliding bearings under different micro-texture structural parameters. The range analysis method was used to analyze the influence of microtexture structural parameters on the bearing capacity of sliding bearing oil film in the order of microtexture depth > long half-shaft length > offset > short half-shaft. The order of influence on friction coefficient is as follows:long semi-axial length > micro-texture depth > offset > short semi-axial length. The optimal microtexture parameters are 200 μm long half axis of the ellipse, 110 μm short half axis of the ellipse, 60 μm depth and 30 μm offset. The establishment and the optimal structure parameters of the micro texture open area ratio, the depth the same, no circular openings of the deviation of the symmetric parabolic micro texture, by comparing the oil film bearing capacity and the friction coefficient of the two, prove that compared with the circular opening micro texture elliptic offset class parabolic micro texture on the bearing performance and friction performance of the sliding bearing to improve better. The influence of micro-texture distribution parameters on the bearing performance and friction coefficient of sliding bearings was analyzed by response surface analysis (RSM). The influence degree of distribution parameters on bearing capacity of sliding bearing oil film is as follows:micro-texture envelope angle > micro-texture axial spacing > micro-texture starting angle. The influence degree of friction coefficient on sliding axis is as follows:micro-texture initial angle > micro-texture axial spacing > micro-texture envelope angle. At the same time, a mathematical model was established for the bearing performance and friction coefficient of sliding bearing with the variation of micro-texture distribution parameters. Then, with the optimal bearing performance and the minimum friction coefficient as the objective function, the distribution parameters of micro-texture were optimized. After optimization processing, The optimal microtexture distribution parameters were obtained as follows:microtexture inclusion angle 4.65°, microtexture starting angle 116.75° and microtexture axial spacing 2.79 mm. The optimal parameters of ellipse openings will offset parabolic sliding bearing of the bearing capacity and the friction coefficient is simulated, and its results and the prototype of smooth sliding bearing and the established model prediction were compared, the results show that the established on the basis of micro texture distribution parameters on the micro texture predict the bearing capacity and the friction coefficient of sliding bearing of the mathematical model with sufficient accuracy; Compared with the prototype sliding bearing, the bearing capacity of the optimal micro-texture sliding bearing increases by 21.05%, while the friction coefficient decreases by 27.93%. In a word, the bearing performance and friction and wear resistance of plain bearings can be greatly improved by machining elliptical bias parabolic microtexture with optimal structure and distribution parameters. |
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