建立一种针对表面硬化滚道三排圆柱滚子风电主轴轴承的疲劳寿命分析方法。首先,在卡迪尔坐标系中建立三排圆柱滚子风电主轴轴承的5自由度力学模型,分析计算在外部5个方向载荷联合作用下轴承的内部滚子载荷分布;然后,建立圆柱滚子与表面硬化滚道之间的弹塑性接触有限元模型,计算得到滚子接触载荷作用下滚道次表面的脉动应力分布;最后,根据Goodman方程将滚道脉动应力幅值转化为交变应力幅值,运用Basquin应力-寿命理论计算得到风电主轴轴承的疲劳寿命。结果表明,轴承的下风向外圈滚道承受来自风轮的推力载荷,其疲劳寿命最短;径向外圈滚道承受风轮的重力载荷,其疲劳寿命最长。轴承的疲劳寿命取决于下风向滚道。
Abstract
A fatigue life analysis method for wind turbine main bearing with the type of three-row cylindrical roller and surface hardened raceways was established. Firstly, a 5-DOF mechanical model of three-row of cylindrical roller wind turbine main bearing was established in the Cartier coordinate system, and the internal roller load distribution of the bearing under the combined action of external loads in five directions was analyzed and calculated. Then, the elastoplastic contact finite element model between the cylindrical roller and the surface hardened raceway was established, and the pulsating stress distribution under the raceway surface caused by the roller contact load was calculated. Finally, the pulsation stress amplitude was converted into alternating stress amplitude by using Goodman equation, and Basquin stress-life theory was used to calculate the fatigue life of wind turbine main bearing. The results show that the downwind outer ring raceway of the bearing bears the thrust load from the wind rotor and has the shortest fatigue life, while the radial outer ring raceway bears the gravity load of the wind rotor and has the longest fatigue life. The fatigue life of the bearing depends on the downwind raceway.
关键词
风电机组 /
滚子轴承 /
载荷分布 /
表面硬化 /
疲劳寿命
Key words
wind turbines /
roller bearing /
load distribution /
surface hardening /
fatigue life
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参考文献
[1] 郑林征. 风电主轴轴承接触分析及优化设计[D]. 大连:大连理工大学, 2016.
ZHENG L Z.Contact analysis and optimal design of main bearing of wind turbine[D]. Dalian: Dalian University of Technology, 2016.
[2] 李润林, 段博志, 杨明川, 等. 风力发电机组双列圆锥滚子轴承载荷分布及寿命计算[J]. 轴承, 2018(5): 1-6.
LI R L, DUAN B Z, YANG M C, et al.Load distribution and life calculation of double row tapered roller bearings for wind turbines[J]. Bearing, 2018(5): 1-6.
[3] 贾现召, 马冀恒, 孟一雯. 基于DesignLife的风电主轴用三排圆柱滚子轴承疲劳寿命计算[J]. 轴承, 2018(12): 5-8.
JIA X Z, MA J H, MENG Y W.Calculation on fatigue Life of three row cylindrical roller bearings for main shaft in wind turbines based on DesignLife[J]. Bearing, 2018, (12): 5-8.
[4] 于春来, 刘洪海, 郭云飞. 三排圆柱滚子转盘轴承寿命计算[J]. 轴承, 2011(8): 7-8.
YU C L, LIU H H, GUO Y F.Calculation of fatigue life of three-row roller slewing bearing[J]. Bearing, 2011(8): 7-8.
[5] AGUIRREBEITIA J, ABASOLO M, AVILES R, et al.Theoretical calculation of general static load)carrying capacity for the design and selection of three row roller slewing bearings[J]. Mechanism and machine theory, 2012, 48: 52-61.
[6] LUDWIK K.Modelling of rollers in calculation of slewing bearing with the use of finite elements[J]. Mechanism and machine theory, 2006, 41: 1359-1376.
[7] GONCZ P, DROBNE M, GLODEZ S.Computational model for determination of dynamic load capacity of large three-row roller slewing bearings[J]. Engineering failure analysis, 2013, 32: 44-53.
[8] GONCZ P, POTOCNIK R, GLODEZ S.Computational model for determination of static load capacity of three-row roller slewing bearings with arbitrary clearances and predefined raceway deformations[J]. International journal of mechanical sciences, 2013, 73: 82-92.
[9] HE P Y, LIU R, HONG R J, et al.Hardened raceway calculation analysis of a three-row roller slewing bearing[J]. International journal of mechanical sciences, 2018, 137: 133-144.
[10] BASAN R, FRANULOVIC M, PREBIL I, et al.Study on Ramberg-Osgood and Chaboche models for 42CrMo4 steel and some approximations[J]. Journal of constructional steel research, 2017, 136: 65-74.
[11] GLODEZ S, POTOCNIK R, FLASKER J.Computational model for calculation of static capacity and lifetime of large slewing bearing’s raceway[J]. Mechanism and machine theory, 2012, 47: 16-30.
[12] DNVGL-ST-0361, Machinery for wind turbines[S].
基金
国家重点研发计划（2018YFB0407304）; 国机集团重大科技专项（SINOMAST-ZDZX-2019-02）
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