| As a main kind of journal bearing, Water-lubricated rubber bearing uses water as lubrication medium, it is widely used in rotor system of rotating machinery such as large ships, turbo-generators and aerospace engines, etc.. The static and dynamic characteristics of water-lubricated rubber bearing have great impact on capacity, noise and life-span of bearing. Therefore, the research is very significant for the practical engineering.This paper mainly investigates the static and dynamic lubrication characteristics of a water-lubricated rubber bearing of a ship shaft and its non-linear contact characteristics between bearing and shaft, the main content and its conclusions are as follows:(1) The Reynolds equation of radial bearing was derived from hydrodynamic theory. And then its boundary condition was deduced from the working condition.(2) Characteristics of rigid bearing were analyzed using Finite Difference Method (FDM). It is found that the FDM result is more quite coincident with classical conclusion. That proved the reliability of this algorithm.(3) A coupling algorithm is used to calculate the pressure distribution of journal bearing. The lubrication performance of journal bearing is carried out after considering the influence of elastic deformation of bush, and the elastic deformation of bush can not be ignored in the case of high eccentric ratio.(4) The nonlinear contact analysis for two kinds of bearings including steel-plate and no steel-plate is carried out, the results show that the existence of the steel-plate greatly enhanced the lubrication performance of water-lubricated rubber bearing.
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