本文選題：齒輪系統(tǒng) + 動態(tài)特性　； 參考：《太原理工大學》2017年碩士論文

【摘要】：礦用減速器作為煤礦機械設備中十分重要的組成部分,在運動和動力傳遞過程中起著不可替代的作用,但其運行工況往往比較惡劣、連續(xù)運轉(zhuǎn)時間長、常常受到各種沖擊載荷的作用,其工作性能的好壞直接影響著整個煤礦機械設備的工作性能的好壞,因此有必要對礦用減速器齒輪系統(tǒng)的動力學特性進行研究,并對齒輪系統(tǒng)動態(tài)特性進行參數(shù)優(yōu)化,提高礦用減速器承載能力和使用壽命、降低振動和噪聲。本文主要研究內(nèi)容如下:(1)運用Romax軟件建立礦用減速器兩級平行軸斜齒輪系統(tǒng)分析模型,在額定工況下對兩級齒輪進行靜力學分析,得到各齒輪的最大接觸應力、最大彎曲應力和齒輪系統(tǒng)嚙合錯位量分布情況;接著分析兩級齒輪副的嚙合狀態(tài)和齒面載荷分布,找到偏載嚴重且受載更大的那對齒輪副。(2)計算得到輸出級斜齒輪副的時變嚙合剛度和受載傳動誤差曲線,分析不同程度齒面磨損對斜齒輪副嚙合剛度和傳動誤差的影響,為齒輪系統(tǒng)動態(tài)特性分析提供基礎。(3)分析齒輪系統(tǒng)在輸出級斜齒輪副傳動誤差激勵下的系統(tǒng)模態(tài)柔度,并找出系統(tǒng)模態(tài)柔度最大的前6階模態(tài)頻率,再通過固有模態(tài)分析得到對應的固有模態(tài)振型;以輸出級齒輪傳動誤差一階諧波為激勵,獲得齒輪系統(tǒng)各軸承動態(tài)軸承力和軸承振動加速度的動態(tài)響應;計算不同程度齒面磨損對軸承力和軸承振動加速度的影響;介紹輪齒不同類型齒面偏差的定義,分析不同類型齒廓偏差和螺旋線偏差對系統(tǒng)動態(tài)響應的影響規(guī)律。(4)介紹斜齒輪齒廓和齒向修形原理和方法,以齒輪傳動誤差波動最小化為目標,以齒輪齒廓、齒向修形參數(shù)為設計變量,運用遺傳算法對齒輪副齒面進行初始優(yōu)化;通過分析各設計變量對齒輪傳動誤差波動的影響,得到了最佳設計變量組合;對齒輪副齒面進行二次修形優(yōu)化,獲得了最佳修形優(yōu)化方案;通過對比優(yōu)化前后齒輪嚙合狀態(tài)和齒面載荷分布,以此來驗證優(yōu)化結(jié)果的正確性。
[Abstract]:As a very important part of coal mine machinery and equipment, the mining reducer plays an irreplaceable role in the process of motion and power transmission, but its operating conditions are often bad, and the continuous running time is long, and it is often affected by various impact loads. The working performance of the coal mine is directly affected by the work of the whole coal mine machinery and equipment. For good or bad performance, it is necessary to study the dynamic characteristics of the gear system of the mining reducer, optimize the dynamic characteristics of the gear system, improve the bearing capacity and service life of the mining reducer, and reduce the vibration and noise. The main contents of this paper are as follows: (1) Romax software is used to establish the two level parallel of the mining reducer. The analysis model of the axis helical gear system is carried out on the statics analysis of two stage gear under the rated condition. The maximum contact stress, maximum bending stress and gear system meshing dislocation distribution are obtained. Then the meshing state and the load distribution of the two gear pair are analyzed, and the pair of gear pairs with serious load and larger load are found. (2) the time-varying meshing stiffness and the load transmission error curve of the output grade helical gear pair are calculated, and the influence of the tooth surface wear on the meshing stiffness and transmission error of the helical gears is analyzed, which provides the basis for the analysis of the dynamic characteristics of the gear system. (3) the system modal flexibility under the transmission error of the transmission stage helical gear pair is analyzed. The first 6 order modal frequencies of the maximum system modal flexibility are found, and the inherent modal vibration modes are obtained by the inherent modal analysis. The dynamic response of the dynamic bearing force and the bearing vibration acceleration of each bearing in the gear system is obtained by the first order harmonic of the output gear transmission error, and the bearing force of different degree of tooth surface wear to the bearing force is calculated. The influence of the vibration acceleration of the bearing is introduced. The definition of the tooth surface deviation of different types of gear teeth is introduced, and the influence of the different types of profile deviation and spiral line deviation on the dynamic response of the system is analyzed. (4) the principle and method of the helical gear profile and tooth profile modification are introduced, with the objective of the gear transmission error minimization, the gear profile and the tooth profile modification parameter. For the design variables, the genetic algorithm is used to optimize the gear pair tooth surface. By analyzing the influence of the design variables on the gear transmission error fluctuation, the optimum design variable combination is obtained. The optimization of the gear pair tooth surface is optimized two times, and the optimum modification is obtained. By comparing the gear meshing state and tooth before and after the optimization, the gear tooth surface is optimized. Surface load distribution is used to verify the correctness of the optimization results.
【學位授予單位】：太原理工大學
【學位級別】：碩士
【學位授予年份】：2017
【分類號】：TD40

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