大兆瓦风电主轴承多工况载荷谱编制
戴莉斯，胡兴涛，肖夏
（1.四川省机械研究设计院（集团）有限公司，四川 成都 610031；2.四川航天烽火伺服控制技术有限公司，四川 成都 611130）
摘要：风电主轴承进行台架疲劳寿命试验时，实际工况下测得的原始载荷数据频率变化太快，无法直接在试验台加载，有效处理原始载荷数据并制作成便于试验台加载的轴承载荷谱是整个疲劳试验的基础，也是疲劳寿命估算的理论依据。以某型号2.5 MW 风电主轴承为例，进行了一种全新的多工况全载荷轴承载荷谱的编制。通过从单一工况延展到多种工况，由一种载荷合并为全载荷，编制方法的核心是雨流计数法统计原始载荷，再利用威布尔三参数方程扩展已知数据，最终得到了该型风机主轴承在30种工况下的10级实验载荷谱。本载荷谱既保留了原始数据的基本特征，又简化了加载方式，使得轴承试验加载成为可能。
关键词：风电主轴承；载荷谱；雨流计数法；威布尔分布；多工况载荷
中图分类号：TM315 文献标志码：A doi：10.3969/j.issn.1006-0316.2021.03.012
文章编号：1006－0316 (2021) 03－0074－07
Compilation of Load Spectrum of Large MW Wind Turbine Main Bearing under Multiple Working Conditions
DAI Lisi，HU Xingtao，XIAO Xia
( 1.Sichuan Machinery Research & Design Institute (Group) Co., Ltd., Chengdu 610031, China;2.Sichuan Aerospace Fenghuo Servo Control Technology Corporation, Chengdu 611130, China )
Abstract：When the main bearing of wind turbine is tested for fatigue life, the frequency of the original load data measured under the actual working condition changes too fast to be loaded directly on the test-bed. It is the basis of the whole fatigue test and the theoretical basis of fatigue life estimation to process the original load data effectively and make the bearing load spectrum which is convenient for the test-bed loading. This study takes a 2.5 MW wind turbine main bearing as an example to compile a new load spectrum of multi-condition full load bearing. From a single working condition to multiple working conditions, one load is combined into a full load. The core of the compiling method is to count the original load by rain-flow counting method first, and then extend the known data by using three-parameter Weibull distribution. Finally the 10-level experimental load spectrum of the main bearing under 30 working conditions is obstained. This load spectrum not only retains the basic characteristics of the original data, but also simplifies the loading mode, making the bearing test loading possible.
Key words：wind turbine main bearing；load spectrum；rain-fall counting method；Weibull distribution；multi-working load
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收稿日期：2020－05－22
作者简介：戴莉斯（1987－），女，四川成都人，硕士，工程师，主要从事流体机械、工程机械方向的项目研发工作，E-mail：597716416@qq.com。
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