【摘要】：只有保證機械產(chǎn)品有良好的可靠性指標才能保障我國機械產(chǎn)品在國際市場上具有爭力,工程設(shè)計中不僅有隨機問題,還含有很多的模糊性問題,這就不得不更加深入研究常規(guī)可靠性設(shè)計理論,擴展它的應(yīng)用范圍。電力驅(qū)動回轉(zhuǎn)減速器是混合動力挖掘機的關(guān)鍵零部件,由于驅(qū)動電機額定轉(zhuǎn)矩大、變化范圍廣,對回轉(zhuǎn)減速器的性能尤其是可靠性提出了更高的要求,論文針對該減速器進行了可靠性分析,為挖掘機電力驅(qū)動回轉(zhuǎn)減速器的優(yōu)化和改進提供更為精確的技術(shù)保障,本文的主要工作內(nèi)容如下:(1)三維建模與有限元分析。根據(jù)減速器的基本參數(shù),運用三維繪圖軟件UG建立回轉(zhuǎn)減速器各關(guān)鍵零件的三維實體模型,并進行裝配模擬。用ANSYS軟件對各關(guān)鍵零件進行有限元分析,驗證該減速器在強度設(shè)計方面的合理性。(2)常規(guī)可靠性分析。建立各零件,各行星輪子系統(tǒng)以及行星輪總系統(tǒng)的常規(guī)可靠度計算模型,根據(jù)減速器的基本參數(shù)與前面的計算結(jié)果,分別代入2組不同的數(shù)據(jù),具體計算電力驅(qū)動回轉(zhuǎn)減速器的各零件以及系統(tǒng)的常規(guī)可靠度,驗證模型的合理性并分析計算結(jié)果。(3)模糊可靠性分析。通過隸屬函數(shù)來定量的描述模糊事件,確定各零件的隸屬函數(shù)確定方案,給出了零件模糊可靠度的計算模型推導(dǎo)方法,并對各零件的模糊可靠度模型進行推導(dǎo),分別代入2組數(shù)據(jù)對減速器各零件和系統(tǒng)的模糊可靠度進行計算,驗證模型的合理性并分析計算結(jié)果。(4)對電力驅(qū)動回轉(zhuǎn)減速器進行疲勞試驗。確定試驗方案,分析試驗結(jié)果,驗證減速器的可靠性,模糊可靠性計算模型的正確性和精確性。
[Abstract]:Only by ensuring that mechanical products have good reliability index can we ensure that China's mechanical products are competitive in the international market. In engineering design, there are not only random problems, but also many fuzzy problems. Therefore, the conventional reliability design theory has to be further studied and its application scope expanded. The electric drive rotary reducer is the key component of the hybrid excavator. Because of the large rated torque and wide range of variation of the drive motor, the performance, especially the reliability, of the rotary reducer is required higher. The reliability analysis of the reducer is carried out in this paper, which provides a more accurate technical guarantee for the optimization and improvement of the electric drive rotary reducer of excavator. The main work of this paper is as follows: (1) 3D modeling and finite element analysis. According to the basic parameters of the reducer, the 3D solid model of the key parts of the rotary reducer is established by using the 3D drawing software UG, and the assembly simulation is carried out. The finite element analysis of the key parts is carried out with ANSYS software to verify the rationality of the reducer in strength design. (2) conventional reliability analysis. The conventional reliability calculation models of each part, planetary wheel system and planetary wheel total system are established. According to the basic parameters of the reducer and the results of the previous calculation, two groups of different data are inserted respectively. The conventional reliability of the parts and systems of the electric drive rotary reducer is calculated, the rationality of the model is verified and the calculation results are analyzed. (3) Fuzzy reliability analysis. The fuzzy events are quantitatively described by membership function, the membership function of each part is determined, the method of calculating fuzzy reliability model is given, and the fuzzy reliability model of each part is deduced. Two groups of data are used to calculate the fuzzy reliability of the parts and systems of the reducer, to verify the rationality of the model and to analyze the results. (4) the fatigue test of the electric drive rotary reducer is carried out. The test scheme is determined and the test results are analyzed to verify the reliability of the reducer and the correctness and accuracy of the fuzzy reliability calculation model.
【學(xué)位授予單位】：湘潭大學(xué)
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2015
【分類號】：TH132.46

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本文編號：2352765