【摘要】：隨著煤炭、石油等能源逐漸減少,生態(tài)環(huán)境問題日益嚴(yán)峻,風(fēng)能作為一種不污染環(huán)境的綠色能源,在世界各國中越來越受到重視。風(fēng)力發(fā)電機(jī)組低速輸入軸軸承在風(fēng)機(jī)主傳動(dòng)鏈中占有重要的地位,其性能的好壞直接影響到風(fēng)電機(jī)組整體運(yùn)行的可靠性。本文以寧夏銀星能源有限公司的1.0MW風(fēng)機(jī)低速輸入軸軸承為研究對(duì)象,首先,依照風(fēng)機(jī)低速輸入軸軸承在全壽命周期下的設(shè)計(jì)載荷工況,以Hertz點(diǎn)接觸理論為基礎(chǔ),計(jì)算了 26種工況下低速輸入軸軸承滾動(dòng)體與內(nèi)、外套圈滾道的接觸應(yīng)力與載荷分布;其次,在Romax Designer軟件中建立了風(fēng)機(jī)低速輸入軸軸承模型,通過仿真分析得到了 26種工況下低速輸入軸軸承滾動(dòng)體與內(nèi)、外套圈滾道的接觸應(yīng)力分布云圖,并與Hertz理論計(jì)算結(jié)果作對(duì)比,驗(yàn)證Romax Designer軟件仿真結(jié)果的正確性;在Romax Designer軟件中,分別仿真分析了 26種工況下軸承徑向游隙與潤滑對(duì)風(fēng)機(jī)低速輸入軸軸承疲勞壽命的影響,得出了當(dāng)徑向游隙為-10μm-0μm、潤滑油膜參數(shù)在2.437附近時(shí),風(fēng)機(jī)低速輸入軸軸承的壽命最高的結(jié)論;并對(duì)傳統(tǒng)的L-P軸承壽命計(jì)算公式進(jìn)行修正,探討了一種考慮徑向游隙的風(fēng)機(jī)低速輸入軸軸承壽命預(yù)測(cè)公式;最后,采用基于結(jié)構(gòu)疲勞與考慮載荷分布的軸承壽命預(yù)測(cè)方法,結(jié)合Miner線性疲勞累計(jì)損傷理論對(duì)風(fēng)機(jī)低速輸入軸軸承進(jìn)行疲勞壽命預(yù)測(cè),并與提出的風(fēng)機(jī)低速輸入軸軸承壽命預(yù)測(cè)公式作對(duì)比,驗(yàn)證提出公式的有效性。所得結(jié)論可以為風(fēng)電機(jī)組低速輸入軸軸承的設(shè)計(jì)與前瞻性維護(hù)提供參考。
[Abstract]:With the gradual reduction of coal, oil and other energy, the ecological environment problem is becoming more and more serious. Wind energy, as a kind of green energy that does not pollute the environment, has been paid more and more attention in the world. The low speed input shaft bearing of wind turbine plays an important role in the main drive chain of wind turbine, and its performance directly affects the reliability of the whole operation of wind turbine. In this paper, the low speed input shaft bearing of 1.0MW fan in Ningxia Yinxing Energy Co., Ltd is taken as the research object. Firstly, according to the design load condition of fan low speed input shaft bearing under the whole life cycle, based on Hertz point contact theory, The contact stress and load distribution between low speed input bearing roller and inner and outer ring raceway under 26 working conditions are calculated. Secondly, the low speed input shaft bearing model of fan is established in Romax Designer software, and the contact stress distribution cloud diagram between low speed input shaft bearing roller and inner and outer ring raceway under 26 working conditions is obtained by simulation analysis. The simulation results of Romax Designer software are verified by comparing with the calculation results of Hertz theory. In Romax Designer software, the effects of bearing radial clearance and lubrication on the fatigue life of fan low speed input shaft bearings under 26 working conditions are simulated and analyzed, and it is concluded that when the radial clearance is-10 渭 m-0 渭 m and the lubrication film parameters are about 2.437, The conclusion that the life of the low speed input shaft bearing of the fan is the highest; The traditional formula for calculating the life of L / P bearing is modified, and a life prediction formula for low speed input shaft bearing of fan considering radial clearance is discussed. Finally, the fatigue life of fan low speed input shaft bearing is predicted by using the bearing life prediction method based on structural fatigue and considering load distribution, combined with Miner linear fatigue cumulative damage theory. Compared with the proposed formula for predicting the life of low speed input shaft bearing of fan, the validity of the formula is verified. The conclusions can be used as a reference for the design and prospective maintenance of low speed input shaft bearings for wind turbines.
【學(xué)位授予單位】：寧夏大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2017
【分類號(hào)】：TH133.3;TM315

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