Influence of slip effect on dynamic performance of miniature tilting-pad dynamic pressure gas bearing

This paper takes the micro tilting-pad gas bearing as the research object. Based on the continuous model, first-order slip model, and Wu's new slip model, the static and dynamic Reynolds equations with the slip effect are established and solved by MATLAB software. First, a hybrid method integrating the Newton–Raphson iteration and finite difference methods was used to solve the static Reynolds equation. Then, the dynamic Reynolds equation was calculated by combining the partial derivative method with the equivalent coefficient method. So, the static and dynamic performance of the micro tilting-pad gas bearing can be obtained. The calculation results indicate that the bearing capacity and film pressure of the tilting-pad gas bearing are reduced, and the dynamic stiffness is reduced after considering the slip effect. In the calculation results, the value of the continuous model is the largest, followed by the first-order slip model, Wu's new slip model is minimum. It provides a reference for the design of the micro tilting-pad gas bearing.