【摘要】：只有保證機械產品有良好的可靠性指標才能保障我國機械產品在國際市場上具有爭力,工程設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)可靠性設計理論,擴展它的應用范圍。電力驅動回轉減速器是混合動力挖掘機的關鍵零部件,由于驅動電機額定轉矩大、變化范圍廣,對回轉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,為挖掘機電力驅動回轉減速器的優(yōu)化和改進提供更為精確的技術保障,本文的主要工作內容如下:(1)三維建模與有限元分析。根據減速器的基本參數,運用三維繪圖軟件UG建立回轉減速器各關鍵零件的三維實體模型,并進行裝配模擬。用ANSYS軟件對各關鍵零件進行有限元分析,驗證該減速器在強度設計方面的合理性。(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,根據減速器的基本參數與前面的計算結果,分別代入2組不同的數據,具體計算電力驅動回轉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果。(3)模糊可靠性分析。通過隸屬函數來定量的描述模糊事件,確定各零件的隸屬函數確定方案,給出了零件模糊可靠度的計算模型推導方法,并對各零件的模糊可靠度模型進行推導,分別代入2組數據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果。(4)對電力驅動回轉減速器進行疲勞試驗。確定試驗方案,分析試驗結果,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.
【學位授予單位】：湘潭大學
【學位級別】：碩士
【學位授予年份】：2015
【分類號】：TH132.46

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本文編號：2352767