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Through the simulation of lubrication condition, the solution of the nonlinear oil film force of the three-lobe journal bearing with Difference Method and the solution of the axis equilibrium position of the three-lobe journal bearing based on Secant Method, we obtained that installation angle of the three-lobe journal bearing has a great influence on bearing capacity of bearing oil film. By use of Secant Method and Decomposition Method of position solving, the axis position can well be solved. The influence of system load on the axis equilibrium position is nonlinear, while under light load and heavy load, the axis equilibrium position can be linearized processing, which is helpful to the solution of equilibrium position.

Lubrication Simulation and Solution of Oil Film Force and the Equilibrium Position of Three-lobe Journal Bearing