| The bearing is a kind of important part in the machine for supporting spindles. It is an urgent question for discussion to solve how to reduce the friction between bearings and shafts and how to improve the efficiency. Devisers have done many works to improve the performance of bearings, which include structure, lubricant, subtract friction material, and manufacturing process aspect. The topic of using tap water to substitute mineral oil as medium in many kinds of mechanical transmissions and liquid dynamical systems is the front of saving energy sources in mechanical transmission systems and environment protection science research area. It has also arose the attention pervasively, and been a hotspot in developed countries in the world.Water lubrication bearing is one of the components widely used in transmission because it has lots of merits mentioned above. But from research and development of the water lubrication bearing, we can see that as a young topic, it still has many problems to be researched. The topic has prevalent and import meaning not only on the mechanism but also in design and application. It includes perfect the lubricate mechanism on water lubricated bearings, and to fill up mechanism of non-mental material friction pairs make water as the lubrication medium, even to enlarge the apply range of the bearings and material. Basic equations include Reynolds equation, deform equation and load equation are set on the base of bearings' structure. Elastic mechanic theory and elastic hydrodynamic lubricated(EHL) theory are used during deduce equations. Equations are made as mathematic model in the paper.The important reason of not easy to get the convergent numerical solution is that plastic alloy's elasticity deform is sensitive to the load. Multi grid method is used and appropriate grid is set during get the numerical solution. Calculate program are programmed after choose alternate initial value. Numerical solution is get by the program. The pressure distributing graph and water membrane figure are protracted by the Numerical solution. Then we used it as the mechanism basic to analyse the bearings' lubrication characteristic. The influence for bearings on speed and load are discussed by experiments. Currents of the experimental result are same as the theory analysis. From that the mechanism is proved to be correct.Research on modifying bearings' material performance was done in the paper. Vulcanize system, stronger filling in system, fence system, and intenerate increase moldsystem are selected to advance its mechanic performance and tribology performance. Influence between appropriate component and material are discussed by experiment. At the same time, short fiber technique are used to enhance the dynamics capability of the bearing' material, and reduce its co-friction obviously. Then the new material for BTG water lubrication plastic alloy bearings is get. Its mechanic capability should attain or exceeded MIL-B-17901B standard (shipping) issued by US DOD.In the structure design, experience formula and experiment data are combined to get the bearings' figure parameter. PVT graph and appropriate long: diameter ratio are get. The best L: D ratio is 4:1. At the same time, some experiments of the pressure about time and temperature are done. Even then the best molding parameter of the BTG water lubrication plastic alloy bearings are get. Influence that caused by different factors on the lubricate capability of the water lubrication bearings are discussed through the experiment. Finally performance about the great carrying capacity and the speed are get.
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