| 引用本文: | 王优强,胡宇,徐莹,房玉鑫,莫君.考虑温度变化的复合织构轴承的摩擦学性能仿真[J].中国表面工程,2024,37(4):218~228 |
| WANG Youqiang,HU Yu,XU Ying,FANG Yuxin,MO Jun.Simulation of Tribological Properties of Compound Dimple Bearing Considering Temperature Variation[J].China Surface Engineering,2024,37(4):218~228 |
|
| 摘要: |
| 表面微织构化是改善轴承摩擦学性能重要手段之一，目前对于表面微织构的设计多以加工简单的单层形状为主，但在对轴承织构化试验和数值模拟研究中发现，单层微织构在减少摩擦磨损和降低能耗方面仍不够突出。基于圆筛藻壳的多层孔状结构，设计矩形-半球型双层复合微织构，并应用于水润滑轴承的高压区，采用热流固耦合的方法，探究在考虑进水温度变化的条件下、双层复合型织构的尺寸变化和轴承转速对水润滑轴承摩擦性能的影响。结果表明：对于任何进水温度，双层复合型织构轴承的减摩性能优于光滑轴承和单层织构轴承。复合织构尺寸效应对润滑水膜压力影响不稳定，但对摩擦因数的影响相对平稳。另外，在任何温度下，复合型织构轴承的转速越高，润滑水膜压力和摩擦因数越大。研究成果在改善水润滑轴承摩擦学性能方面有更进一步的突破，可为减小摩擦磨损及延长轴承使用寿命的相关研究提供借鉴。 |
| 关键词: 矩形-半球型复合织构 水润滑轴承 热流固耦合 有限元分析 |
| DOI：10.11933/j.issn.1007-9289.20230910001 |
| 分类号:TG156；TB114 |
| 基金项目:国家自然科学基金（51575289）；山东省自然科学基金面上项目（ZR2021ME063） |
|
| Simulation of Tribological Properties of Compound Dimple Bearing Considering Temperature Variation |
|
WANG Youqiang1，2，HU Yu1，2，XU Ying1，2，FANG Yuxin1，2，MO Jun1，2
|
|
1.School of Mechanical and Automotive Engineering, Qingdao University of Technology,Qingdao 266520 , China ；2.Key Lab of Industrial Fluid Energy Conservation and Pollution Control of Ministry of Education,Qingdao 266520 , China
|
| Abstract: |
| Surface texturing is one of the main methods used to improve the tribological performance of bearings, and previous studies on microstructures mainly focused on a single-layer shape, such as rectangular, spherical, or cylindrical. However, in experimental and numerical simulation investigations of the tribological performance of textured lubricated bearings, the bearings have a single-layer pore shape and can only generate a dynamic pressure effect, which makes single-layer microtexture models in the reduction of friction, wear, and energy consumption insufficient for analyzing the performance. In addition, many recent studies on the tribological performance of textured water-lubricated bearings were based on isothermal assumptions but ignored the effect of temperature on the lubrication performance of bearings. This study mimicked the multilayered pore-like structure of circular-sieve algal shells and established a rectangular–hemispherical double-layered composite microtextured model to investigate the tribological performance of composite texturing-sized water-lubricated bearings. The model is applied to the high-pressure region of water-lubricated bearings and is based on the method of heat fluid–solid coupling to determine the water film load-carrying capacity of the water-lubricated bearing, the frictional force, and the friction factor effects. Inputs such as geometrical parameters from the literature were calculated, and the calculated water film load-carrying capacities were compared. The results were found to be consistent with results obtained from the literature, verifying the accuracy of the model. Based on this, the effects of the change in bearing speed and size of the double-layer composite texture on the tribological performance of composite textured water-lubricated bearings were investigated for different water inlet temperatures. The results indicate that for any water inlet temperature, the friction-reduction performance of double-layer composite textured bearings is better than those of smooth bearings and single-layer textured bearings. At a specific temperature, the higher the rotational speed, the higher the lubricating water-film pressure and the friction coefficient. At the same rotational speed, the water film pressure decreases with an increase in inlet water temperature when the inlet water temperature is low (20–50 ℃), whereas the coefficient of friction increases gradually. When the inlet water temperature increases to 50–60 ℃, the effects of temperature on the water film pressure and friction coefficient of the composite textured bearings gradually tend to stabilize. This indicates that the inlet temperature and bearing speed combine to influence the friction performance of the composite textured bearings. By changing the size of the composite textured structure, the inlet water temperature directly influences the friction performance of the composite textured bearing; the higher the inlet water temperature, the lower the water film pressure, but the coefficient of friction increases. At the same water inlet temperature, the size of the composite texture significantly influences the water film pressure but has a minimal effect on the coefficient of friction. This study promotes further breakthroughs in improving the tribological properties of water-lubricated bearings and provides a reference for related studies on reducing the frictional wear and extending the service life of bearings. |
| Key words: rectangular-spherical compound dimple water-lubricated bearings thermal-fluid-structure coupling finite element analysis |
