风力机偏航轴承滚道硬化层接触疲劳损伤分析  

STUDY ON CONTACT FATIGUE DAMAGE OF HARDENED LAYER OF YAW BEARING RACEWAY IN WIND TURBINE

作　　者：牛蔺楷[1] 杨洁明[1] 高俊云[2] 

机构地区：[1]太原理工大学机械电子工程研究所,太原030024 [2]太原重工技术中心,太原030024

出　　处：《太阳能学报》2013年第8期1415-1420,共6页Acta Energiae Solaris Sinica

基　　金：国家自然科学基金(50975188);国家自然科学基金重点项目(51035007)

摘　　要：针对风力机偏航轴承尺寸大、转速低、承载复杂、标准轴承疲劳损伤分析方法不再适用等问题,对内圈固定外圈旋转的偏航轴承滚道硬化层接触疲劳损伤问题进行分析。首先通过求解偏航轴承整体静力平衡方程得到各滚球处的接触载荷分布。然后采用连续损伤力学理论构建了硬化层材料的非线性本构模型,结合已求的最大接触载荷对其进行疲劳损伤分析。结果表明,最大损伤值发生于接触表面以下一定深度处。Due to properties of large scale, low rotation speed and complex load conditions of yaw bearing, the analysis procedure of fatigue damage for standard bearings cannot be used. The contact fatigue damage of hardened layer of yaw bearing with fixed inner ring and movable outer ring was investigated. First, the contact loads distribution of yaw bearing was evaluated by solving equations of static equilibrium. The nonlinear material constitutive equation of hardened layer was constructed using continuum damage mechanics, and analyzing based on the solved maximum contact load. The analysis results show that the maximum damage value occurs some certain distance below the contact surface.

关 键 词：风力机 偏航轴承 接触载荷分布 接触疲劳损伤 

分 类 号：TK83[动力工程及工程热物理—流体机械及工程]