本文選題：行星齒輪傳動(dòng) + 輪齒修形　； 參考：《天津大學(xué)》2012年碩士論文

【摘要】：斜齒圓柱齒輪傳動(dòng)具有嚙合平穩(wěn)、承載能力強(qiáng)等優(yōu)點(diǎn)，行星齒輪傳動(dòng)裝置具有結(jié)構(gòu)緊湊、體積小、重量輕、傳動(dòng)比大等優(yōu)點(diǎn)，汽車自動(dòng)變速器常采用斜齒行星齒輪傳動(dòng)裝置。 齒輪的制造、安裝誤差及嚙合過程中輪齒變形等因素會(huì)引起嚙合沖擊并伴有噪聲和振動(dòng)，齒輪軸的彎曲變形和扭轉(zhuǎn)變形會(huì)導(dǎo)致輪齒承受載荷分布不均、承載能力下降，一般的改善方法是對(duì)輪齒作齒廓修形和齒向修形，研究表明，輪齒修形可有效減輕嚙合沖擊、消除輪齒邊緣接觸和齒向偏載，對(duì)減振降噪、提高齒輪承載能力和使用壽命很有意義，具有重要工程應(yīng)用價(jià)值。 本文圍繞汽車行業(yè)對(duì)輪齒修形的重要需求，以某轎車自動(dòng)變速器中一級(jí)斜齒行星傳動(dòng)裝置為研究對(duì)象，提出了一種快速參數(shù)化有限元建模方法，對(duì)內(nèi)齒圈和行星輪嚙合副的齒廓修形和齒向修形、嚙合特性及動(dòng)力接觸分析等進(jìn)行了較為深入的研究，主要研究成果如下： 1.基于ANSYS APDL參數(shù)化編程設(shè)計(jì)語言，提出斜齒行星傳動(dòng)裝置的快速參數(shù)化建模方法，該方法具有準(zhǔn)確簡(jiǎn)便及參數(shù)易修改等優(yōu)點(diǎn)，為修形設(shè)計(jì)和嚙合特性分析奠定了基礎(chǔ)。 2.基于有限元分析，，提取輪齒沿嚙合線方向的位移確定最大齒廓修形量，設(shè)計(jì)齒廓修形曲線，通過參數(shù)化語言實(shí)現(xiàn)齒廓的微量修整，并對(duì)齒廓修形前后嚙合應(yīng)力與接觸應(yīng)力做分析與對(duì)比研究。 3.提取行星輪的彎曲變形和扭轉(zhuǎn)變形，確定鼓形量和螺旋角修形量，進(jìn)行鼓形修形和螺旋角修形，并對(duì)修形前、后的接觸應(yīng)力做對(duì)比分析，研究表明螺旋角修形比鼓形修形更適用于齒向修形。 4.將嚙合周期等分并建立各嚙合位置綜合修形前、后的齒圈段模型，深入分析最大嚙合應(yīng)力和最大接觸應(yīng)力隨嚙合位置的變化情況。 5.建立不同修形條件下嚙出位置的有限元模型，基于正交試驗(yàn)確定了各修形因素對(duì)嚙合特性的影響規(guī)律，給出了修形因素的最優(yōu)組合。 6.使用ANSYS/LS-DYNA模擬傳動(dòng)過程，并分析了動(dòng)態(tài)嚙合特性，研究表明修形能夠消除嚙合沖擊，同時(shí)明確了轉(zhuǎn)速對(duì)動(dòng)態(tài)接觸力波動(dòng)和齒輪副振動(dòng)的影響。
[Abstract]:Helical cylindrical gear transmission has the advantages of stable meshing, strong bearing capacity and so on. The planetary gear transmission has the advantages of compact structure, small volume, light weight, large transmission ratio and so on. The manufacturing, installation error and tooth deformation of gear will cause meshing shock and noise and vibration. The bending deformation and torsional deformation of gear shaft will lead to the uneven distribution of load and the decrease of bearing capacity. The research shows that the gear tooth modification can effectively reduce the meshing impact, eliminate the tooth edge contact and tooth bias load, and reduce vibration and noise. It is of great significance to improve the bearing capacity and service life of gears, and has important engineering application value. In this paper, a fast parameterized finite element modeling method is put forward, which is focused on the important requirement of gear tooth modification in automobile industry, and takes the first class oblique planetary transmission of a car automatic transmission as the research object. The tooth profile modification, meshing characteristics and dynamic contact analysis of inner gear and planetary gear meshing pair are studied deeply. The main results are as follows: 1. Based on ANSYS APDL parametric programming language, a rapid parameterized modeling method for oblique tooth planetary transmission is proposed. The method is accurate, simple and easy to modify, which lays a foundation for shape modification design and meshing characteristic analysis. 2. Based on the finite element analysis, the displacement along the meshing line of the gear tooth is extracted to determine the maximum tooth profile modification, and the profile modification curve is designed, and the micro-dressing of the tooth profile is realized by parameterized language. The meshing stress and contact stress before and after tooth profile modification are analyzed and compared. 3. The bending deformation and torsional deformation of planetary gear are extracted, the drum shape and spiral angle modification are determined, and the contact stresses before and after modification are compared and analyzed. The results show that helical angle modification is more suitable for tooth modification than drum modification. 4. The meshing period is divided equally and the gear ring segment model is established before and after the combined modification of each meshing position, and the variation of the maximum meshing stress and the maximum contact stress with the meshing position is analyzed in depth. 5. The finite element model of the meshing position under different modification conditions is established. Based on the orthogonal test, the influence of each modification factor on the meshing characteristics is determined, and the optimal combination of the modification factors is given. 6. ANSYS/LS-DYNA is used to simulate the transmission process, and the dynamic meshing characteristics are analyzed. The results show that the modification can eliminate the meshing impact, and at the same time, the influence of the rotational speed on the dynamic contact force fluctuation and the vibration of the gear pair is clarified.
【學(xué)位授予單位】：天津大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2012
【分類號(hào)】：TH132.41

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本文編號(hào)：1953757