Aerostatic journal bearing applications mainly focus on high-speed precision machining, so predictable and smooth functioning of the system is crucial. Air is supplied to the bearing through a number of orifices and any unevenness in the size of these orifices will affect the performance of the system. The size difference could be due to manufacturing error and/or blockage of the orifice because of foreign materials in the air system. In this study, the performance of an aerostatic bearing with a partially blocked orifice is numerically investigated. Firstly, the airflow in the bearing clearance was modeled with Reynolds equation and this equation was numerically solved with the finite difference and differential transform hybrid method to obtain the pressure distribution. Then, the force and the stiffness are calculated from the pressure distribution for different blockage cases of the orifice and different blockage ratios. The results show that the partial blockage of the orifice significantly changes the performance of the system in a positive or a negative way according to the feeding hole position, and the blockage ratio also affects performance.

空气静压轴颈轴承的应用主要集中在高速精密加工上，因此系统的可预测和平稳运行至关重要。空气通过许多孔口供应到轴承，这些孔口尺寸的任何不均匀都会影响系统的性能。尺寸差异可能是由于制造误差和/或由于空气系统中的异物而造成的孔口堵塞。在这项研究中，通过数值研究了孔口部分堵塞的空气静压轴承的性能。首先，利用雷诺方程对轴承间隙中的气流进行建模，并利用有限差分和微分变换混合法对该方程进行数值求解，以获得压力分布。然后，根据孔的不同阻塞情况和不同阻塞率，由压力分布计算出力和刚度。结果表明，孔口的部分堵塞会根据进料孔的位置以正或负的方式显着改变系统的性能，堵塞率也会影响性能。