| In modern times, it is becoming more important of the development of thesocial economy of the wind power. So, the position of the durability to windgenerator is more remarkable. To develop the wind power, we should do a lot ofwork on the wind generator. What we need is to get more energy effectively andmore income under the limited economic investment. It is an important anduseful topic. Because of the large capacity of wind power generators, the load onthe wind generator must be deeply, also the probability of incident is higher.Obviously, if we want to develop the wind power, what we should first do is toconsuming the safety and efficiency of the wind generator. Not only thecountries and regions, but the enterprise, all they are paying attention to the lifeand reliability. All of them are doing more research and efforts to meet the higherdemand.For all the parts in the wind generator, one of the most important parts is thetransmission part, which is also been called gear box. It has a pivotal position sothat scholars focused more attention on the growth of it. Especially in recentyears, countries should take the technology of their own, for which they took alot of technical research. For all of these reasons, the research ability of the gearbox is becoming more impeccable. They have done static analysis and dynamicanalysis on the parts, then to the system. After that, they did analysis on thecomponents of the structure, the reliability analysis on the system, and so on. Allof those works were to ensure that the life of the transmission system in gear boxshould be longer, so that the achievement of wind power would be significant.In this paper, the main purpose was to do analysis on the parameters and thereliability of the gear transmission system of the2MW wind generator, then whatwe did was to optimize the parameters. This project was getting the fund of TheNatural Science Foundation of Shaanxi Province (2010JM7017) and ShaanxiProvincial Department (2010JK418) of Education. Then, we did all analysis onthe2MW wind generator came from a group which work on wind power in Shandong province. We made analysis on planetary gear transmission systemand inclined gear transmission system separately, judged the influence of thetransformation to the wind loading. Then, we did analysis on the reliability to therolling bearing. For those works, we did optimization on the bearing reliabilityunder the premise of the optimization of system parameters. The main works inthis paper are as follows.Firstly, we made the physical model of the2MW wind generators. We madephysical models of the planetary gear transmission system and inclined geartransmission system distinguished. On the basis of those, we did mechanicalanalysis on every parts (gear pairs), then we studied their elastic deformation.For considering the actual work space of the wind generator, this paper also didanalysis on the influence of the excitation to the system.Secondly, we accounted all the differential equations for using mathematicalmethod. Also, we did interpretation on the influences to the system dynamicswhich caused the loading coefficient. Then the ideal values were calculatedunder the assistance of the MATLAB software.Thirdly, in the premise of the loading coefficient, we evaluated thereliability of the system. We established the reliability evaluation models of thegear transmission system and rolling bearing separately, for which we could getthe reliability evaluation model of the series system.Finally, we did optimization to the parameters of the gear box system usingthe optimal toolbox in MATLAB software. Choosing the rolling bearing used theoptimized parameters, then to calculate the reliability of the system again. Fromthe data, we could find that the volume of the gear box being smaller, but thereliability higher. |
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