Fluid bearings have features of high speed and high rotation accuracy, and therefore, they are used in spindle motors of hard disk drives, cooling fans of central processing units, and other devices. Further, these bearings have microherringbone grooves on the shaft or sleeve inner surface that help generate dynamic pressure in the lubricant fluid around the shaft. Although the depth of the groove is constant, dynamic pressure can be increased by decreasing the depth from both ends to the central corner of each groove on a micron scale. This study aims to verify the effect of sloped herringbone grooves using computational fluid dynamics (CFD) analysis and to develop a new microfabrication method for manufacturing microsloped herringbone grooves on the shaft surface using abrasive jet machining. The generated dynamic pressure is analyzed using CFD; the results indicated that the sloped herringbone grooves result in an increase in the dynamic pressure at the groove tips and cause a decrease in the fluctuations in dynamic pressure in the circumferential direction.

流体轴承具有转速高、旋转精度高等特点，因此广泛用于硬盘驱动器的主轴电机、中央处理器的冷却风扇等设备中。此外，这些轴承在轴或套筒内表面上具有微型人字形凹槽，有助于在轴周围的润滑液中产生动态压力。虽然凹槽的深度是恒定的，但可以通过以微米级减少每个凹槽的两端到中心角的深度来增加动压。本研究旨在使用计算流体动力学 (CFD) 分析验证倾斜人字形凹槽的影响，并开发一种新的微细加工方法，使用磨料喷射加工在轴表面制造微倾斜人字形凹槽。使用CFD分析产生的动态压力；