【摘要】：近年來,風(fēng)電在能源產(chǎn)業(yè)中異軍突起,并呈現(xiàn)以每年30%的增長速度的發(fā)展趨勢(shì)。但現(xiàn)代風(fēng)力發(fā)電用減速機(jī)(包括偏航驅(qū)動(dòng)減速機(jī)和變槳驅(qū)動(dòng)減速機(jī))所承受的外部載荷為隨時(shí)間變化的動(dòng)態(tài)隨機(jī)載荷,所產(chǎn)生的動(dòng)應(yīng)力往往引起疲勞損傷和疲勞斷裂。而傳統(tǒng)的偏航驅(qū)動(dòng)減速機(jī)往往基于靜強(qiáng)度設(shè)計(jì)方法,采用加大許用安全系數(shù)或降低許用應(yīng)力的方法來提高其可靠性,而未采用抗疲勞設(shè)計(jì),故往往既不能提高偏航驅(qū)動(dòng)減速機(jī)的可靠性和安全性,又不能達(dá)到偏航驅(qū)動(dòng)減速機(jī)結(jié)構(gòu)輕量化的目的。 為此,本文采用數(shù)值仿真方法對(duì)偏航驅(qū)動(dòng)減速機(jī)中的行星傳動(dòng)部分進(jìn)行了動(dòng)力學(xué)分析、疲勞分析以及箱體的模態(tài)分析,對(duì)偏航驅(qū)動(dòng)減速機(jī)的抗疲勞設(shè)計(jì)具有較大的參考價(jià)值。論文的主要工作表現(xiàn)如下: (1)對(duì)總體偏航減速機(jī)進(jìn)行了虛擬裝配和仿真分析,結(jié)果驗(yàn)證了整個(gè)偏航減速機(jī)的模擬運(yùn)行良好,為運(yùn)用ANSYS軟件進(jìn)行接觸和疲勞分析做了良好的保證。 (2)對(duì)行星齒輪接觸問題進(jìn)行了有限元分析,得到了齒輪嚙合過程的接觸應(yīng)力分布和等效應(yīng)力分布,結(jié)果表明,行星齒輪初始嚙合接觸時(shí),隨著行星齒輪嚙合的繼續(xù)進(jìn)行,產(chǎn)生接觸應(yīng)力的范圍不斷擴(kuò)大,最大應(yīng)力急速增大至460MPa,小于行星齒輪材料的屈服極限。 (3)對(duì)偏航減速機(jī)行星齒輪進(jìn)行了疲勞仿真分析,獲得了行星齒輪的疲勞壽命次數(shù)和累計(jì)疲勞系數(shù),結(jié)果表明,以42CrMo為材料的行星齒輪的抗疲勞特性符合偏航減速機(jī)工業(yè)設(shè)計(jì)的要求。 (4)對(duì)偏航減速機(jī)箱體進(jìn)行的模態(tài)分析結(jié)果顯示:偏航驅(qū)動(dòng)減速機(jī)現(xiàn)有約束條件下的固有頻率偏離轉(zhuǎn)子運(yùn)動(dòng)件激振頻率,與之對(duì)應(yīng)的臨界轉(zhuǎn)速遠(yuǎn)遠(yuǎn)低于減速機(jī)的工作轉(zhuǎn)速,不易產(chǎn)生共振。
[Abstract]:In recent years, wind power has emerged in the energy industry, and presents an annual growth rate of 30%. However, the external load of modern wind power reducer (including yaw drive reducer and variable propeller drive reducer) is dynamic random load with time, and the dynamic stress often leads to fatigue damage and fatigue fracture. However, the traditional yaw drive reducer is often based on the static strength design method, which uses the method of increasing the allowable safety factor or reducing the allowable stress to improve its reliability, but does not adopt the anti-fatigue design, so it can not improve the reliability and safety of the yaw drive reducer, and can not achieve the purpose of lightening the structure of the yaw drive reducer. In this paper, the dynamic analysis, fatigue analysis and modal analysis of the box are carried out by using the numerical simulation method to analyze the dynamics, fatigue and modal analysis of the planet drive reducer, which has great reference value for the anti-fatigue design of the yaw drive reducer. The main work of this paper is as follows: (1) the virtual assembly and simulation analysis of the overall yaw reducer are carried out, and the results verify that the simulation of the yaw reducer runs well, which provides a good guarantee for the contact and fatigue analysis by using ANSYS software. (2) the contact stress distribution and equivalent stress distribution of the gear meshing process are obtained by finite element analysis of the contact problem of the planet gear. The results show that with the continuation of the engagement of the planet gear, the range of contact stress is expanding, and the maximum stress increases rapidly to 460 MPA, which is smaller than the yield limit of the planet gear material. (3) the fatigue simulation analysis of the planet gear of yaw reducer is carried out, and the fatigue life times and cumulative fatigue coefficient of the planet gear are obtained. The results show that the anti-fatigue characteristics of the planet gear based on 42CrMo meet the requirements of the industrial design of the yaw reducer. (4) the modal analysis results of yaw reducer box show that the natural frequency of yaw drive reducer deviates from the excitation frequency of rotor moving parts under the existing constraint conditions, and the corresponding critical speed is much lower than the working speed of reducer, and it is not easy to produce resonance.
【學(xué)位授予單位】：湖南大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2011
【分類號(hào)】：TH132.46

【參考文獻(xiàn)】

相關(guān)期刊論文 前10條

1 王若慧;行星齒輪傳動(dòng)的優(yōu)化設(shè)計(jì)[J];電力學(xué)報(bào);2002年02期

2 王華僑;結(jié)構(gòu)有限元分析中的網(wǎng)格劃分技術(shù)及其應(yīng)用實(shí)例[J];CAD/CAM與制造業(yè)信息化;2005年01期

3 龍凱,程穎;齒輪嚙合力仿真計(jì)算的參數(shù)選取研究[J];計(jì)算機(jī)仿真;2002年06期

4 馬波;高金吉;江志農(nóng);楊劍鋒;;旋轉(zhuǎn)機(jī)械故障診斷專家系統(tǒng)[J];機(jī)電工程技術(shù);2005年12期

5 李威,于照,賈志新,孟惠榮;基于可靠度約束的行星齒輪傳動(dòng)系統(tǒng)參數(shù)優(yōu)化設(shè)計(jì)[J];機(jī)械科學(xué)與技術(shù);2003年06期

6 尚德廣，王德俊，韓楠林;疲勞裂紋萌生尺寸的定義及其確定方法[J];機(jī)械強(qiáng)度;1996年02期

7 范元?jiǎng)?王華坤;基于遺傳算法的少齒差行星齒輪傳動(dòng)參數(shù)優(yōu)化設(shè)計(jì)[J];機(jī)械設(shè)計(jì)與制造工程;2002年06期

8 楊興,朱大奇,桑慶兵,史慧,郭今昌;智能故障診斷專家系統(tǒng)開發(fā)平臺(tái)研制[J];控制工程;2005年S2期

9 王丹;減速機(jī)故障的模糊診斷[J];遼寧省交通高等�？茖W(xué)校學(xué)報(bào);2005年02期

10 古瑩奎,卜英勇;故障診斷專家系統(tǒng)原理與設(shè)計(jì)[J];南方冶金學(xué)院學(xué)報(bào);2000年04期

相關(guān)碩士學(xué)位論文 前1條

1 張涵;電梯曳引機(jī)行星齒輪減速器的優(yōu)化設(shè)計(jì)研究[D];昆明理工大學(xué);2006年

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