Study On Friction And Wear Property And Lubricant Mechanism Of Water Lubricated Bearing

All kinds of friction pairs in the system of mechanical transmission were made of metal, and oil was used to be lubrication in the past. Not only a great deal of oil and Precious metal was exhausted, but also environment was polluted. It is very important to study the tribologial property of water lubricated bearing, it can help us to understand the lubricant mechanism of that, at the same time, it also can provide the theoretic base for improvement and application of water lubricated bearing. Compared with traditional oil lubricated metal bearings, the water lubricated ones possesses different tribological property. And the performance of bearing material plays an important role in operation life and working performance of bearing. Moreover, the structure and working condition of bearing have great effects on the tribological property, so it is very important to choose ideal working condition to make bearing possess high loading capacity and low friction coefficient. At the same time, the lubricant mechanism of water lubricant bearing is different from that of metal one because of structure with grooves. According above, in order to make clear the theory and technology optimization of this kind of new technique, "Study on Friction and Wear Property and Lubricant Mechanism of Water Lubricated Bearing" is put forward and some achievements with theory significance and application value have been acquired by research over three years.The bearing material was chosen and modified in the paper at first, and then the tribological property was studied. The result showed that some fillers such as carbon fibre, glassfiber, graphite, PTFE and so on have remarkable modified effect on water lubricated bearing materials.The tribological property of water lubricated plastic bearing was studied in particular, and wear rate of bearing was mensurated by the way of volumeter. The relationship of the friction coefficient , wear rate and the structure of bearing ,working condition was studied by experiment, and the date of experiment was deal with, then the lubricant mechanism was analyzed. The results showed that the system of waterlubricated plastic bearing is in the state of fluid dynamic pressure lubrication due to hydrophilic property of plastic in certain working condition.The water lubricant mechanism of acrylonitrile butadiene rubber bearing was analyzed and studied systematically. First, the model of water lubricated acrylonitrile butadiene rubber bearing was simplified, second, the lubricant equation was established, third, the relationship of bearing capacity and water film thickness was researched, and the effect of some factors such as elastic deformation and structure on the lubricant mechanism was studied in detail.A study on the problems of grain-abrasion of acrylonitrile butadiene rubber bearing in water containing sand by means of electron microscopic scanning and theory analyzing, the physical course of wear under action of free grain-abrasion was studied. And the effects of load, speed, the size and the content of sand on grain-abrasion were also investigated, the relationship formulas of wear rate and load, speed, the size and the content of sand was obtained.Moreover, the wear mechanism was studied in principle of force- chemistry, and it was checked by methods of elementary analysis. Then the primary chemical course of the face of rubber bearing in the course of wearing was accquried.The tribological property of water lubricated rubber bearing was major studied in the end, and the relationship of friction coefficient and working condition and the structure of bearing was obtained, The experiential formula was obtained by the way of dealing with testing data, and then the feasible working condition can be calculated according to the experiential formula and the lubricant equation, which is of important sense in theory and fact.