风电装备行星轮系过盈接触特性分析

发布时间：2018-06-20 03:33

本文选题：风电装备 + 过盈配合　；参考：《振动与冲击》2017年05期

【摘要】：风力发电对于保障我国能源安全具有重大意义,但我国风电装备发展中还存在巨大技术瓶颈,如何进一步提高装备可靠性及寿命是亟需解决问题。以行星轮系过盈配合面接触特性与微动磨损关系为切入点,针对NGW型行星轮受力分析,计算获取过盈配合接触分析的载荷边界条件;通过对比不同过盈量在无外载工况下的配合面压力值,理论计算与仿真分析结果的平均误差约为5.74%,验证了仿真的可信度;通过对比不同过盈量在无外载下的变形量,行星轮内孔面与轴承外圈变形占比分别为89.5%和10.5%,定量描述了行星轮相较于轴承的变形程度,更易损伤;稳态载荷工况下,通过对比不同配合公差P6和R6下的最大微动滑移量可知,P6公差带下最大微动量随载荷变化幅度较大,因此风电行星轮配合公差应选R6更合适;非稳态载荷工况下,通过数值积分计算获取不同过盈量下的配合面打滑极限载荷,该极限值作为评定实际服役工况下出现剧烈"打滑现象"的准则,因此设计时应考虑该极限工况。
[Abstract]:Wind power generation is of great significance to ensure the energy security of our country, but there are still huge technical bottlenecks in the development of wind power equipment in China. How to further improve the reliability and life of the equipment is an urgent problem to be solved. Based on the contact characteristics of interference fit surface and fretting wear of planetary gear train, the load boundary conditions of interference fit contact analysis are calculated according to the force analysis of NGW type planetary gear. The average error between theoretical calculation and simulation analysis is about 5.74, and the reliability of simulation is verified by comparing the pressure values of different interference quantities under the condition of no external load, and the deformation of different interference amounts under no external load is compared. The ratio of deformation between the inner hole surface of the planetary wheel and the outer ring of the bearing is 89.5% and 10.5% respectively. The deformation degree of the planetary wheel is more easily damaged than that of the bearing. By comparing the maximum fretting slippage under different fit tolerances P6 and R6, it can be seen that the maximum micro-momentum varies greatly with the load in the P6 tolerance zone, so it is more suitable to select R6 for the cooperation tolerance of the planetary gear of wind power, and under the unsteady load condition, The sliding limit load of fit surface under different interference is obtained by numerical integral calculation. The limit value is taken as the criterion to evaluate the severe "skid phenomenon" under actual service condition, so the limit condition should be considered in design.
【作者单位】：清华大学机械工程系;
【基金】：国家自然科学基金(51475263)
【分类号】：TM614

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