兆瓦级风力发电机齿轮传动系统的动力学特性和可靠性研究
发布时间：2018-08-29 08:09
【摘要】：随着传统能源的日益枯竭和传统能源带来的环境问题日益严峻,风能作为一种绿色可再生能源受到了广泛的重视。风力发电机组工作于高空架设状态,维修困难。齿轮传动增速箱是风力发电系统的核心关键部件之一,因此对其可靠性有较高的要求。因此,研究在真实载荷条件下风力发电机的可靠性具有重要意义,本文在研究风力发电机齿轮传动系统的动态特性的基础上对其可靠性进行研究。 本文的1.5MW风力发电机齿轮传动系统采用一级行星传动加两级平行轴斜齿轮传动的结构形式,研究其在时变风载荷下的动力学特性,并对其可靠性进行研究。 论文的主要研究工作包括: ①建立基于两参数威布尔分布的随机风速模型,使其更真实的反应系统的外部激励特征,并能模拟出与实际相符的风速。 ②采用集中质量法建立了风电传动系统的动力学模型,同时考虑系统的时变啮合刚度、时变啮合误差和阻尼影响。 ③求得系统动态响应,包括各齿轮的振动位移、振动速度,各齿轮副的动态啮合力以及轴传递的动态扭矩,并对响应进行频域分析。通过对比不同的激励响应,得出动力学响应特性的变化规律。 ④根据动力学分析得出的结果,建立齿轮传动系统的模糊可靠性评估模型以及整个齿轮箱的评估模型,对风电传动系统进行可靠性分析。 本文所做的研究工作,为在变风载下兆瓦级风力发电机齿轮传动系统的工程设计提供了一定的理论参考依据,为工程应用奠定了基础。
[Abstract]:With the depletion of traditional energy and the increasingly serious environmental problems brought by traditional energy, wind energy as a kind of green renewable energy has received extensive attention. The wind turbine set up at high altitude is difficult to maintain. Gear gearbox is one of the key components of wind power system, so its reliability is very important. Therefore, it is of great significance to study the reliability of wind turbine under real load. In this paper, the reliability of wind turbine gear transmission system is studied on the basis of studying its dynamic characteristics. In this paper, the gear transmission system of 1.5MW wind turbine adopts the structure form of the first stage planetary transmission and two-stage parallel axis helical gear transmission. The dynamic characteristics of the gear transmission system under time-varying wind load are studied and its reliability is studied. The main work of this paper is as follows: 1 the stochastic wind speed model based on two-parameter Weibull distribution is established to make the external excitation characteristics of the response system more realistic. The dynamic model of the wind power transmission system is established by using the lumped mass method, and the time-varying meshing stiffness of the system is taken into account. The dynamic response of the system is obtained, including the vibration displacement, vibration velocity, dynamic meshing force of each gear pair and the dynamic torque transmitted by the shaft, and the response is analyzed in frequency domain. According to the results of dynamic analysis, the fuzzy reliability evaluation model of gear transmission system and the evaluation model of the whole gearbox are established. The reliability of wind power transmission system is analyzed. The research work in this paper provides a theoretical basis for the engineering design of the gear-drive system of megawatt wind turbine under variable wind load and lays a foundation for engineering application.
【学位授予单位】：重庆大学
【学位级别】：硕士
【学位授予年份】：2011
【分类号】：TH132.41
本文编号：2210698
[Abstract]:With the depletion of traditional energy and the increasingly serious environmental problems brought by traditional energy, wind energy as a kind of green renewable energy has received extensive attention. The wind turbine set up at high altitude is difficult to maintain. Gear gearbox is one of the key components of wind power system, so its reliability is very important. Therefore, it is of great significance to study the reliability of wind turbine under real load. In this paper, the reliability of wind turbine gear transmission system is studied on the basis of studying its dynamic characteristics. In this paper, the gear transmission system of 1.5MW wind turbine adopts the structure form of the first stage planetary transmission and two-stage parallel axis helical gear transmission. The dynamic characteristics of the gear transmission system under time-varying wind load are studied and its reliability is studied. The main work of this paper is as follows: 1 the stochastic wind speed model based on two-parameter Weibull distribution is established to make the external excitation characteristics of the response system more realistic. The dynamic model of the wind power transmission system is established by using the lumped mass method, and the time-varying meshing stiffness of the system is taken into account. The dynamic response of the system is obtained, including the vibration displacement, vibration velocity, dynamic meshing force of each gear pair and the dynamic torque transmitted by the shaft, and the response is analyzed in frequency domain. According to the results of dynamic analysis, the fuzzy reliability evaluation model of gear transmission system and the evaluation model of the whole gearbox are established. The reliability of wind power transmission system is analyzed. The research work in this paper provides a theoretical basis for the engineering design of the gear-drive system of megawatt wind turbine under variable wind load and lays a foundation for engineering application.
【学位授予单位】：重庆大学
【学位级别】：硕士
【学位授予年份】：2011
【分类号】：TH132.41
【引证文献】
相关硕士学位论文 前5条
1 张壮飞;风力发电机齿轮传动系统变载荷动力学特性研究[D];重庆大学;2012年
2 王海军;柔性销轴风电行星齿轮传动强度研究[D];重庆大学;2012年
3 杨洋;大功率风电增速器性能评价研究[D];大连理工大学;2013年
4 吕程;大功率风电增速器动态特性分析与优化设计[D];大连理工大学;2013年
5 方俊元;风力发电机组齿轮箱强度可靠性优化研究[D];华北电力大学;2013年
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