【摘要】：弧齒錐齒輪因其承載能力高、傳動效率高、傳動平穩(wěn)、噪聲小等優(yōu)點，被廣泛的應(yīng)用于汽車、拖拉機、航空、航海、機床等行業(yè)中。在拖拉機的中央傳動中，弧齒錐齒輪擔(dān)負(fù)著傳遞扭矩和改變運動的方向的作用，是重要動力傳輸零件。該零件在強度、動態(tài)性能和可靠性方面要求都很高，然而弧齒錐齒輪在傳動系統(tǒng)中的工況十分復(fù)雜，可能會出現(xiàn)由原動機和負(fù)載引起的外部激勵嚙入嚙出的沖擊、齒側(cè)間隙、齒形誤差等引起的內(nèi)部激勵�；↓X錐齒輪朝著高速、重載和輕質(zhì)方向發(fā)展。因而，很有必要對拖拉機中央傳動弧齒錐齒輪的動力學(xué)特性、強度、可靠性方面進行深入研究。 本文運用CAD/CAE計算機輔助技術(shù)，，對集材-80拖拉機前橋及后橋弧齒錐齒輪進行有限元分析及優(yōu)化。 （1）根據(jù)弧齒錐齒輪的嚙合原理及齒面微分鄰域特性具體分析了弧齒錐齒輪的實際齒面嚙合情況，結(jié)合弧齒錐齒輪的切齒原理及刀具方程，推導(dǎo)出了弧齒錐齒輪的齒面方程。 （2）利用pro/e參數(shù)化設(shè)計程序，建立了弧齒錐齒輪的三維實體模型；并將弧齒錐齒輪三維實體模型進行了虛擬裝配、運動仿真和干涉檢查。 （3）對接觸問題有限元求解方法進行分析比較，建立了弧齒錐齒輪接觸模型、確定了接觸算法；考慮到計算機資源和接觸的實際情況，創(chuàng)新地采用三齒接觸模型，提出了一種新的加載方式；運用ansys進行了非線性分析，得到了其嚙合齒輪的等效應(yīng)力圖、應(yīng)變圖及其分布情況；應(yīng)用赫茲接觸理論對集材-80拖拉機前橋及后橋弧齒錐齒輪進行接觸強度理論值計算，并將有限元分析值與理論值進行對比分析，驗證了有限元的可靠性。 （4）對弧齒錐齒輪進行了高速旋轉(zhuǎn)下的模態(tài)分析，得到了弧齒錐齒輪在高速旋轉(zhuǎn)下的自振頻率遠(yuǎn)大于回轉(zhuǎn)頻率和嚙合頻率，證實在正常工況下不可能出現(xiàn)因齒輪嚙合引起的自身共振；通過振型圖可以直觀地發(fā)現(xiàn)齒輪振動的薄弱環(huán)節(jié)。從而為齒輪的研究、設(shè)計和維護提供可靠的依據(jù)。 （5）以最小體積、彎曲強度設(shè)計的許用傳遞功率最大和接觸強度設(shè)計的許用傳遞功率最大建立總的目標(biāo)函數(shù)，利用復(fù)合形法，對弧齒錐齒輪傳動進行多目標(biāo)優(yōu)化。使設(shè)計更符合實際、更合理、更科學(xué)，為弧齒錐齒輪的主要參數(shù)的確定提供了一種新的方法。
[Abstract]:Arc bevel gear is widely used in automobile, tractor, aviation, navigation, machine tool and so on because of its high bearing capacity, high transmission efficiency, stable transmission, low noise and so on. In the central transmission of tractor, arc bevel gear plays the role of transferring torque and changing the direction of movement, and is an important part of power transmission. This part requires high strength, dynamic performance and reliability. However, the working conditions of arc tooth bevel gear in the transmission system are very complex, which may result in the impact of external excitation and meshing induced by prime motive and load, and the tooth side clearance. Internal excitation caused by tooth profile errors, etc. Arc bevel gears develop at high speed, heavy load and light weight. Therefore, it is necessary to study the dynamics, strength and reliability of the central drive arc bevel gear. In this paper, the finite element analysis and optimization of front axle and rear axle arc bevel gear of skidding 80 tractor are carried out by using CAD/CAE computer aided technology. The main contents are as follows: (1) according to the meshing principle of arc tooth bevel gear and the differential neighborhood characteristic of tooth surface, the actual tooth surface meshing of arc tooth bevel gear is analyzed concretely, and the tooth surface equation of arc tooth bevel gear is derived by combining the cutting principle of arc tooth bevel gear and tool equation. (2) the 3D solid model of spiral bevel gear is established by using pro/e parametric design program, and the 3D solid model of arc bevel gear is assembled, simulated and checked by interference. (3) the finite element method of contact problem is analyzed and compared, and the contact model of spiral bevel gear is established, and the contact algorithm is determined. Considering the actual situation of computer resources and contact, a new loading method is proposed by using the three-tooth contact model. The nonlinear analysis is carried out by using ansys, and the equal effect effort, strain diagram and its distribution of the meshing gear are obtained. The contact strength of front axle and rear axle arc bevel gear of skidding 80 tractor is calculated by Hertz contact theory. The reliability of finite element method is verified by comparing the finite element analysis value with the theoretical value. (4) Modal analysis of spiral bevel gear under high speed rotation shows that the natural vibration frequency of arc bevel gear under high speed rotation is much higher than that of rotation frequency and meshing frequency. It is proved that the self-resonance caused by gear meshing is not possible under normal working conditions. The weak link of gear vibration can be found intuitively by mode diagram. It provides reliable basis for the research, design and maintenance of gears. (5) based on minimum volume, maximum allowable transfer power in bending strength design and maximum allowable transfer power in contact strength design, the total objective function is established, and multi-objective optimization of arc-tooth bevel gear transmission is carried out by means of compound shape method. The design is more practical, reasonable and scientific. It provides a new method for determining the main parameters of spiral bevel gear.
【學(xué)位授予單位】：西北農(nóng)林科技大學(xué)
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2012
【分類號】：S219.02;TH132.41

【參考文獻】

相關(guān)期刊論文 前10條

1 閆頌，吳繼澤;壓力角螺旋角等對弧齒錐齒輪強度的影響[J];北京航空航天大學(xué)學(xué)報;1995年03期

2 閆頌，吳繼澤;接觸區(qū)等對弧齒錐齒輪彎曲強度的影響[J];北京航空航天大學(xué)學(xué)報;1996年01期

3 陳良玉,蔡春源,鄂中凱;螺旋錐齒輪嚙合振動的力學(xué)模型[J];東北工學(xué)院學(xué)報;1993年02期

4 陳良玉,鄂中凱,顧群,王延忠;弧齒錐齒輪齒面和過渡曲面的方程與數(shù)值計算[J];東北工學(xué)院學(xué)報;1993年05期

5 魏延剛;李力行;兆文忠;;擺線針輪行星傳動針齒殼的有限元分析[J];大連鐵道學(xué)院學(xué)報;1992年01期

6 林國成;標(biāo)準(zhǔn)漸開線直齒圓柱齒輪輪齒彎曲應(yīng)力和齒形系數(shù)的有限元分析[J];哈爾濱工業(yè)大學(xué)學(xué)報;1985年A6期

7 李盛鵬;方宗德;張金良;郭輝;;弧齒錐齒輪齒根彎曲應(yīng)力分析[J];航空動力學(xué)報;2007年05期

8 劉光磊;樊紅衛(wèi);谷霽紅;江平;;一種弧齒錐齒輪傳動性能優(yōu)化方法[J];航空學(xué)報;2010年08期

9 王三民,董海軍,李繼慶;彈性支承下弧齒錐齒輪齒面接觸特性的理論與實驗研究[J];航空學(xué)報;1998年06期

10 陳國榮,呂春紅;弧齒錐齒輪三維實體模型的構(gòu)建方法[J];河南機電高等專科學(xué)校學(xué)報;2003年02期

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