本文選題：RV減速器　切入點：可靠性建模　出處：《北方工業(yè)大學(xué)》2017年碩士論文

【摘要】：RV減速器是結(jié)合行星傳動和巧妙地利用曲柄軸實現(xiàn)擺線傳動的減速器,具有結(jié)構(gòu)緊湊、過載能力強(qiáng)和可靠性高等優(yōu)點。目前國內(nèi)的RV減速器僅處于研究生產(chǎn)階段,其主要原因是國內(nèi)生產(chǎn)的RV減速器存在傳動精度低、振動噪聲大和壽命短等缺點,另外,國內(nèi)對RV減速器可靠性的探索研究相對較少,且針對RV減速器可靠性方面的理論并不完善,因此,RV減速器可靠性研究對促進(jìn)其發(fā)展有十分重要的工程意義。首先,利用Pro/ENGINEER建立RV減速器各個簡化零部件的模型,并根據(jù)其相應(yīng)的位置關(guān)系完成裝配和相關(guān)的檢驗,然后采用ANSYS Workbench對RV減速器行星齒輪、擺線輪和滾動軸承進(jìn)行幾種特殊工況下的瞬態(tài)動力學(xué)分析,并以此進(jìn)一步對其進(jìn)行疲勞壽命分析,為其壽命預(yù)測提供了理論基礎(chǔ)。其次,建立RV減速器關(guān)鍵件的結(jié)構(gòu)可靠性計算模型,并完成行星齒輪、擺線輪和滾動軸承的可靠度計算。通過結(jié)果可知,行星齒輪和擺線輪的可靠性相對較高,不容易發(fā)生損壞,曲柄軸處的滾針軸承受力最大,其可靠度最低,因此,滾針軸承可靠性的高低直接制約著整機(jī)的可靠性。再次,利用故障樹分析法尋找RV減速器主要構(gòu)件的故障模式,以RV減速器失效為頂事件建立故障樹,分析RV減速器的薄弱環(huán)節(jié)和影響其正常工作的相關(guān)因素,同時,將RV減速器整機(jī)故障狀態(tài)與各零部件的故障狀態(tài)利用邏輯關(guān)系有機(jī)地聯(lián)系在一起,大大提高了分析效率。最后,基于現(xiàn)有的條件設(shè)計RV減速器綜合試驗方案,選擇合理的RV減速器失效判據(jù),為RV減速器可靠性試驗奠定理論基礎(chǔ)。
[Abstract]:RV reducer is a reducer which combines planetary transmission and cleverly uses crank shaft to realize cycloidal transmission. It has the advantages of compact structure, strong overload ability and high reliability. At present, RV reducer in China is only in the stage of research and production. The main reason is that the RV reducer produced in our country has the disadvantages of low transmission precision, high vibration and noise, short life and so on. In addition, there are relatively few researches on the reliability of RV reducer in our country. The reliability theory of RV reducer is not perfect, so the research on reliability of RV reducer is of great engineering significance to promote its development. Firstly, the model of each simplified parts of RV reducer is established by using Pro/ENGINEER. According to the corresponding position relation, the assembly and related inspection are completed, and then ANSYS Workbench is used to analyze the transient dynamics of RV reducer planetary gear, cycloid wheel and rolling bearing under several special working conditions. Furthermore, the fatigue life of RV reducer is analyzed, which provides a theoretical basis for its life prediction. Secondly, the structural reliability calculation model of the key parts of RV reducer is established, and the planetary gear is completed. The reliability calculation of cycloidal gear and rolling bearing. The results show that the reliability of planetary gear and cycloid wheel is relatively high and it is not easy to be damaged. The needle roller bearing at the crank shaft has the greatest force and its reliability is the lowest. The reliability of needle roller bearings directly restricts the reliability of the whole machine. Thirdly, the fault tree is established by using the fault tree analysis method to find the fault mode of the main components of the RV reducer, taking the failure of the RV reducer as the top event. The weakness of RV reducer and the related factors affecting its normal operation are analyzed. At the same time, the logic relation between the fault state of the whole RV reducer and the fault state of the parts and components is organically linked together, which greatly improves the efficiency of the analysis. Based on the existing conditions, the comprehensive test scheme of RV reducer is designed, and a reasonable failure criterion of RV reducer is selected, which lays a theoretical foundation for reliability test of RV reducer.
【學(xué)位授予單位】：北方工業(yè)大學(xué)
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2017
【分類號】：TH132.46

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本文編號：1690852