Effect of Texture Region on the Static and Dynamic Characteristic of Partially Textured Journal Bearings
Effect of Texture Region on the Static and Dynamic Characteristic of Partially Textured Journal Bearings
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DOI：
10.1007/978-3-319-99262-4_31
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发表时间：
2018-08
期刊：
影响因子：
--
通讯作者：
H. Taura
中科院分区：
文献类型：
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作者：
H. Taura
从理论上研究了毛化区域对部分毛化轴承静、动态特性的影响。采用考虑流体惯性和凹坑边缘能量损失影响的数值模型，计算了几种不同织构区域的部分织构滑动轴承的承载能力、刚度和阻尼系数。结果表明，在滑动轴承表面的卸载区域形成表面织构后，在较宽的Sommerfeld数范围内，轴承的承载能力与光滑轴承相当。利用油膜动特性系数计算了对称刚性转子支承在两个相同织构轴承上的线性稳定临界转速。结果表明，在较高Sommerfeld数下，从轴承顶部沿旋转方向270°处开始的织构区的稳定性阈值速度高于完全织构轴承的稳定性阈值速度。从这些结果中，可以得出结论，适当的局部纹理形成的轴承表面上可以提高承载能力和稳定性特性的同时。
The effect of the texturing region on the static and dynamic characteristics of partially textured bearings, of which the texturing area is limited on the bearing surface in the circumferential direction, were investigate theoretically. The load carrying capacity and stiffness and damping coefficients of some partially textured journal bearings with the different textured region were calculated by using a numerical model considering the effects of both fluid inertia and energy loss at the edges of the dimples. The results showed that when the surface texturing was formed in the unloaded region of the journal bearing surface, the load carrying capacity maintains as much as the smooth bearing for a wide range of Sommerfeld number. The linear stability threshold speeds of a symmetrical rigid rotor supported in two identical textured bearings was also calculated with the dynamic coefficients of the oil film. The results obtained showed that when the texture region starts from 270° from the top of the bearing in the rotating direction, the stability threshold speeds are higher than those of the fully textured bearing at relatively high Sommerfeld number. From these results, it was concluded that an appropriate partial texturing formed on the bearing surface can improve both the load carrying capacity and the stability characteristics simultaneously.