Effect of Structural Parameters on Dynamic Characteristic of Fluid Pivot Journal Bearing

The stiffness and damping of the fluid pivot journal bearing (FPJB) which has been selected as the subject of study in this paper are systematically investigated. Based on the FPJB structure and principle of operation, geometrical models have been established and numerical methods (FDM) are used to determine the floating conditions of the pads and the dynamic coefficients of the bearings. Initially, the floating conditions of the pads according to the preload factor are indicated. On this basis, the equilibrium position of the shaft and bearing system is determined according to the bearing parameters: preload, gap size, recess area. Finally, the effects of these parameters on the stiffness and damping coefficients are shown. © 2022, The Institution of Engineers (India).