风电高速轴制动器温度场及热力耦合分析  

Analysis of Temperature Field and Thermal Coupling of Wind Power High-speed Shaft Brake

作　　者：孙煊广 张锦 殷玉枫[1] 王建梅[1] 宁可[1] SUN Xuanguang;ZHANG Jin;YIN Yufeng;WANG Jianmei;NING Ke(School of Mechanical Engineering,Taiyuan University of Science and Technology,Taiyuan Shanxi 030024,China;Shanxi Traffic Vocational and Technical College,Taiyuan Shanxi 030031,China)

机构地区：[1]太原科技大学机械工程学院,山西太原030024 [2]山西交通职业技术学院,山西太原030031

出　　处：《润滑与密封》2020年第12期67-72,80,共7页Lubrication Engineering

基　　金：国家自然科学基金项目(U1610118;51875382);山西省交通运输厅科技计划项目(2019-1-9);山西省重点研发计划项目(201803D421103).

摘　　要：大型风电制动器紧急制动涉及摩擦、流体、热弹性、高能量密度摩擦副等多物理场耦合,为了进一步揭示其摩擦功传热原理,基于传热性能分析理论,推导风电高速轴制动器热-机耦合三维有限元数学模型,利用有限元分析软件Abaqua瞬态完全热力耦合法,研究风电高速轴刹车盘热应力特性。结果表明,风电制动器对偶件由于接触不均匀,导致温度在盘圆周方向推移的时效性及不对称性特征。解释了由于换热和热流输入的循环交替变化引起温度在半径方向上的温升及应力变化规律,并针对热应力集中区产生热裂纹萌生及扩展情形进行推理论证,对大型风电机高速轴刹车盘转速过高状态下的高热能摩擦作用机制研究具参考作用。The emergency braking of large wind power brake involves the multi-physical field coupling of friction,fluid,thermal elasticity,high energy density friction pairs,in order to further reveal its friction heat transfer principle,based on the theory of heat transfer the analysis,the thermal-mechanical coupling three-dimensional finite element mathematical model of wind power high-speed shaft brake was deduced.The transient thermal stress characteristics of the wind power brake were studied by the transient complete thermodynamic coupling method of finite element analysis software Abaqua.The results show that the uneven contact of the wind power brake dual parts causes the timeliness and asymmetry characteristics of temperature in the circumferential direction of plate.The law of temperature rise and stress change in radial direction caused by the alternation of heat transfer and heat flow input was explained,and the thermal crack initiation and propagation in the thermal stress concentration area was reasoned.It can be used as a reference for the study of high heat friction mechanism of high speed shaft brake disc of large wind turbine.

关 键 词：风电制动器 温度场 热应力 热裂纹 

分 类 号：TH117.1[机械工程—机械设计及理论]