【作者】 张震；

【导师】 崔亚辉；

【作者基本信息】 西安理工大学 ， 机械设计及理论， 2010， 硕士

【摘要】 增速齿轮箱是风力发电增速环节的一个重要的部件,而齿轮传动作减速应用和增速应用在传动性能方面有较大的差距,主要反映在传动效率低,温升、噪声、振动比减速传动时严重等方面。本文针对齿轮传动的增速应用,对两个重要指标——传动效率和振动进行了系统的研究。本文按照齿轮啮合理论推导了齿轮齿面间的滑动速度计算公式,分析了影响滑动速度的因素,研究了滑动速度随传动比的变化规律。在计入摩擦力的情况下对齿轮啮合力进行了分析,得到了摩擦力对主动轮阻力矩的影响情况。在此基础上对计入摩擦力的齿轮啮合功率损失进行了研究。在综合了国内外对齿轮搅油损失研究的基础上,给出了齿轮增速搅油损失的计算公式,并分析了诸多因素对搅油损失的影响,在计入搅油损失的基础上,分析了传动参数对传动效率的影响。在上述工作的基础上,导出了考虑啮合损失、搅油损失和轴承损失的齿轮传动效率计算式,并进行了大量实验验证。结果证明该效率计算式正确可用。为了解决风电增速箱在实际工程中振动大的问题,本文还以齿轮系统动力学理论为基础,用集中质量法建立了齿轮系统动力学模型,并利用牛顿法给出了该系统模型的微分方程表达式和矩阵方程,进一步利用阵型叠加法对所研究系统在增速和减速两种工况下的自由振动和外激励受迫振动分别进行了响应求解,结果显示,增速传动时系统响应的振幅更大,振动严重。该工作为解决风电增速箱的振动问题提供了重要理论依据。更多还原

【Abstract】 As an important component in speed acceleration processing of wind power gearbox, while the existence of the more severe adverse effect of speed acceleration applications mainly including low transmission efficiency, temperature, noise and vibration than speed deceleration. The two important indicators of the speed acceleration of gear drive-transmission efficiency and vibration are systematically studied in this thesis.The sliding velocity equation between gear tooth surfaces are presented based on Gear meshing theory,the factors that affect the sliding velocity are analyzed, the characteristic of sliding velocity vary with the transmission ratio is studied. The gear meshing forces are analyzed including the case of friction; the effect of friction to the friction resistance torque of the driving wheel is achieved. On this basis, the gear mesh power loss is studied counting on friction. The oil lose formula of speed acceleration process of gear box is derived after the comprehensive studies both home and abroad. The impact of the transmission factors to the transmission efficiency are analyzed when the oil lose effect is considered.Based on the above-mentioned work, the calculation formula of Gear Efficiency considering meshing losses and oil lose is derived, the formula is verified by a large number of experimental verification. The results show that the efficiency formula is valid.To address the high vibration problems of wind power box in practical application, the Kinetic model of the gear box is established using lumped-mass method based on gear train kinetic theory. The Differential expression and matrix equation of this system are achieved using Newton’s method. The response solving of the free vibration and forced vibration of this system at speed acceleration and deceleration conditions are carried out using formation superposition method. The results showed that the response and vibration amplitude is more severe in speed acceleration applications, which provides an important theoretical basis to solve the vibration problem of wind power gearbox.更多还原