【摘要】：近年來,風電在能源產(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。但現(xiàn)代風力發(fā)電用減速機(包括偏航驅(qū)動減速機和變槳驅(qū)動減速機)所承受的外部載荷為隨時間變化的動態(tài)隨機載荷,所產(chǎn)生的動應力往往引起疲勞損傷和疲勞斷裂。而傳統(tǒng)的偏航驅(qū)動減速機往往基于靜強度設計方法,采用加大許用安全系數(shù)或降低許用應力的方法來提高其可靠性,而未采用抗疲勞設計,故往往既不能提高偏航驅(qū)動減速機的可靠性和安全性,又不能達到偏航驅(qū)動減速機結構輕量化的目的。 為此,本文采用數(shù)值仿真方法對偏航驅(qū)動減速機中的行星傳動部分進行了動力學分析、疲勞分析以及箱體的模態(tài)分析,對偏航驅(qū)動減速機的抗疲勞設計具有較大的參考價值。論文的主要工作表現(xiàn)如下: (1)對總體偏航減速機進行了虛擬裝配和仿真分析,結果驗證了整個偏航減速機的模擬運行良好,為運用ANSYS軟件進行接觸和疲勞分析做了良好的保證。 (2)對行星齒輪接觸問題進行了有限元分析,得到了齒輪嚙合過程的接觸應力分布和等效應力分布,結果表明,行星齒輪初始嚙合接觸時,隨著行星齒輪嚙合的繼續(xù)進行,產(chǎn)生接觸應力的范圍不斷擴大,最大應力急速增大至460MPa,小于行星齒輪材料的屈服極限。 (3)對偏航減速機行星齒輪進行了疲勞仿真分析,獲得了行星齒輪的疲勞壽命次數(shù)和累計疲勞系數(shù),結果表明,以42CrMo為材料的行星齒輪的抗疲勞特性符合偏航減速機工業(yè)設計的要求。 (4)對偏航減速機箱體進行的模態(tài)分析結果顯示:偏航驅(qū)動減速機現(xiàn)有約束條件下的固有頻率偏離轉子運動件激振頻率,與之對應的臨界轉速遠遠低于減速機的工作轉速,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.
【學位授予單位】：湖南大學
【學位級別】：碩士
【學位授予年份】：2011
【分類號】：TH132.46

【參考文獻】

相關期刊論文 前10條

1 王若慧;行星齒輪傳動的優(yōu)化設計[J];電力學報;2002年02期

2 王華僑;結構有限元分析中的網(wǎng)格劃分技術及其應用實例[J];CAD/CAM與制造業(yè)信息化;2005年01期

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

4 馬波;高金吉;江志農(nóng);楊劍鋒;;旋轉機械故障診斷專家系統(tǒng)[J];機電工程技術;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系統(tǒng)參數(shù)優(yōu)化設計[J];機械科學與技術;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];機械強度;1996年02期

7 范元勛,王華坤;基于遺傳算法的少齒差行星齒輪傳動參數(shù)優(yōu)化設計[J];機械設計與制造工程;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)平臺研制[J];控制工程;2005年S2期

9 王丹;減速機故障的模糊診斷[J];遼寧省交通高等�？茖W校學報;2005年02期

10 古瑩奎,卜英勇;故障診斷專家系統(tǒng)原理與設計[J];南方冶金學院學報;2000年04期

相關碩士學位論文 前1條

1 張涵;電梯曳引機行星齒輪減速器的優(yōu)化設計研究[D];昆明理工大學;2006年

，

本文編號：2504856