本文選題：行星傳動　切入點：動力學　出處：《大連理工大學》2012年碩士論文　論文類型：學位論文

【摘要】：行星傳動利用多個行星輪分擔載荷,形成功率分流,并且能較好利用內齒圈的空間容積和內嚙合的高承載性,具有體積小、傳動比大、效率高、工作平穩(wěn)、承載力強等優(yōu)點,因此廣泛應用于汽車、工程機械及航空航天等領域。但由于在生產裝配過程中不可避免的制造誤差與安裝誤差,會使各行星輪載荷分配不均。行星傳動的載荷分配不均,會嚴重降低傳動系統(tǒng)承載能力,并產生噪音、振動、輪齒點蝕等,從而降低傳動系統(tǒng)可靠性。因此,有必要對行星傳動系統(tǒng)的均載特性進行研究。 本論文主要開展了以下研究工作： 首先,采用集中參數法,建立了行星傳動系統(tǒng)動力學模型。在引入輪齒彈性變形協(xié)調條件,考慮系統(tǒng)綜合誤差的前提下,基于牛頓第二定律及動量矩定理,建立行星傳動多自由度動力學方程；運用有限元法進行行星傳動輪齒準靜態(tài)分析,得到時變嚙合剛度函數；運用Runge-Kutta法求解動力學方程。 其次,分析了行星傳動系統(tǒng)動力學均載特性。通過求解實例,得到傳動系統(tǒng)時域響應；分析了輸入轉速、系統(tǒng)剛度和齒輪誤差對動力學均載系數的影響；開發(fā)了行星傳動系統(tǒng)動力學均載特性分析軟件。結果顯示,系統(tǒng)動力學載荷分配不均勻系數隨轉速升高而增大；中心構件支承剛度適當減小,會使動力學載荷分配不均勻系數降低；太陽輪偏心誤差對動力學載荷分配不均勻系數影響比較顯著。 再次,對行星傳動系統(tǒng)均載特性進行了有限元分析。對行星齒輪系統(tǒng)的有限元參數化建模：應用二維彈性梁單元模擬行星架,多點約束方程模擬回轉副,彈簧單元模擬軸承支承；建立了行星傳動接觸模型。通過對實例的計算,得到行星傳動有限元均載特性。 最后,對部分現有均載技術的均載性能進行了分析。研究了柔性銷技術的扭轉順從特性和動力學均載特性；分析了太陽輪、行星架、內齒圈單獨浮動時系統(tǒng)的動力學均載性能。結果顯示,中心構件浮動均能有效提高系統(tǒng)均載性能。
[Abstract]:The planetary transmission uses many planetary wheels to share the load, forms the power split, and can make better use of the space volume of the inner gear ring and the high bearing capacity of the inner meshing. It has the advantages of small volume, large transmission ratio, high efficiency, steady working, strong bearing capacity, etc. Therefore, it is widely used in automobile, construction machinery, aerospace and other fields. However, due to the inevitable manufacturing error and installation error in the production and assembly process, the load distribution of the star wheel will be uneven and the load distribution of the planetary transmission will be uneven. The load carrying capacity of transmission system will be seriously reduced, and the noise, vibration and pitting of gear teeth will be produced, thus the reliability of transmission system will be reduced. Therefore, it is necessary to study the uniform load characteristics of planetary transmission system. The main work of this thesis is as follows:. First of all, the dynamic model of planetary transmission system is established by means of lumped parameter method. Based on Newton's second law and the theorem of moment of momentum, the elastic deformation coordination condition of gear teeth is introduced, and the comprehensive error of the system is considered. The dynamic equation of planetary transmission with multiple degrees of freedom is established, the quasi static analysis of planetary transmission gear teeth is carried out by using finite element method, and the time-varying meshing stiffness function is obtained, and the dynamic equation is solved by Runge-Kutta method. Secondly, the dynamic load sharing characteristics of planetary transmission system are analyzed. The time-domain response of the transmission system is obtained by solving an example, and the effects of input speed, system stiffness and gear error on the dynamic load sharing coefficient are analyzed. A software for the analysis of dynamic load sharing characteristics of planetary transmission system is developed. The results show that the uneven coefficient of dynamic load distribution increases with the increase of rotational speed, and the supporting stiffness of the central member decreases appropriately. The non-uniform coefficient of dynamic load distribution will be reduced, and the eccentric error of solar wheel will have a significant effect on the non-uniform coefficient of dynamic load distribution. Thirdly, the finite element analysis of the planetary transmission system is carried out. The finite element parametric modeling of the planetary gear system is carried out. The two-dimensional elastic beam element is used to simulate the planetary frame, and the multi-point constraint equation is used to simulate the rotary pair. Spring element simulates bearing support, establishes contact model of planetary transmission, and obtains finite element load-sharing characteristics of planetary transmission by calculating examples. Finally, the load-sharing performance of some existing load-sharing technologies is analyzed. The torsional compliance characteristics and dynamic load-sharing characteristics of flexible pin technology are studied, and the sun wheel and planetary frame are analyzed. The results show that the central component floating can effectively improve the load sharing performance of the system.
【學位授予單位】：大連理工大學
【學位級別】：碩士
【學位授予年份】：2012
【分類號】：TH132.425

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