本文選題：齒廓　切入點：人字齒同步帶　出處：《哈爾濱工業(yè)大學(xué)》2014年博士論文　論文類型：學(xué)位論文

【摘要】：針對特殊傳動領(lǐng)域?qū)ν綆鲃訅勖⒕群驮肼曀岢龅南拗埔?已經(jīng)成為制約同步帶應(yīng)用和發(fā)展的瓶頸問題。人字齒同步帶是繼直齒和斜齒同步帶傳動之后,帶傳動領(lǐng)域新的熱點研究課題。人字型排列的帶齒,不同于直齒嚙合傳動機理,是解決制約同步帶傳動技術(shù)瓶頸問題的突破技術(shù)和手段。針對同步帶與帶輪在完全、不完全嚙合區(qū)存在不同的嚙合性能特點,研究擬在提高傳動系統(tǒng)性能、協(xié)應(yīng)兩種嚙合性能的帶與輪齒齒形。在此基礎(chǔ)上,以現(xiàn)有的研究成果為基礎(chǔ),借助等共軛曲率高階切觸階嚙合理論,推導(dǎo)出了具有傳動側(cè)隙小、齒形協(xié)同關(guān)系友好、齒面接觸強度高,接觸點鄰域間隙3階無窮小的圓弧齒形作為人字齒同步帶傳動的法面齒廓模型。利用彈性力學(xué)復(fù)變函數(shù)映射法,建立了法面齒形參數(shù)、載荷同帶齒應(yīng)力關(guān)系的計算模型,研究了齒形參數(shù)對帶齒應(yīng)力的影響,揭示了各參數(shù)之間的耦合關(guān)系及變化規(guī)律,確定了影響帶齒應(yīng)力變化規(guī)律的主要參數(shù)。建立了帶齒與輪齒剛?cè)狁詈辖佑|非線性三維有限元分析模型,研究了螺旋角、側(cè)隙、帶輪結(jié)構(gòu)對帶齒、強力層的應(yīng)力和變形影響規(guī)律,確定了重要的影響參數(shù)。建立了新齒廓人字齒同步帶在完全和不完全嚙合區(qū)嚙合傳動三維數(shù)學(xué)仿真模型,研究了齒形、節(jié)距差、螺旋角等參數(shù)對嚙合傳動干涉影響,揭示了齒廓干涉形貌與各參數(shù)關(guān)系,優(yōu)選了傳動結(jié)構(gòu)及齒形參數(shù)。開展了新齒廓人字齒同步帶、帶輪關(guān)鍵制造技術(shù)研究。針對模具、帶輪新齒形曲面的性能,建立了帶輪刀具-帶輪和帶齒-刀具-模具二次包絡(luò)的設(shè)計體系,研究了曲面包絡(luò)過程中嚙合界限線、根切界限線、瞬時接觸線、二次接觸、包絡(luò)齒廓曲面形成等特點,揭示了切削中產(chǎn)生振動的原因并提供了消除振動方法,制備了帶輪和樣帶。開展了新齒廓人字齒同步帶與同端面齒形的直齒同步帶的傳動誤差、噪聲、帶齒疲勞磨損性能對比研究。建立了基于直齒同步帶多邊形效應(yīng)的幾何關(guān)系傳動模型,研究了多邊形效應(yīng)對傳動系統(tǒng)嚙入、嚙出端速度波動誤差的影響。建立了新齒廓人字齒同步帶具有爬齒特征的動態(tài)傳動誤差模型,研究了帶寬、螺旋角、帶輪齒數(shù)對傳動誤差的影響,揭示了人字齒傳動精度高的機理,螺旋率是降低傳動誤差關(guān)鍵參數(shù),螺旋率等于整數(shù)時傳動誤差最小。通過對臺架噪聲、疲勞磨損實驗的數(shù)據(jù)采集、分析對比,人字齒比直齒同步帶傳動更平穩(wěn),傳動噪聲更低(在共振條件下最大降噪11d B),噪聲實驗數(shù)據(jù)與國外的斜齒和人字齒同步帶作了對比,降噪效果略優(yōu)。光學(xué)顯微鏡對進行了263h的人字齒、233h的直齒同步帶疲勞磨損后齒面觀測,人字齒齒面磨損更輕,磨損位置與磨損程度與嚙合干涉磨損理論研究結(jié)果一致,表明新齒廓人字齒同步帶比直齒具有更高的帶齒強度。
[Abstract]:Aiming at the limitation of the life, precision and noise of the synchronous belt transmission in the special transmission field, it has become a bottleneck problem that restricts the application and development of the synchronous belt. Different from the mechanism of straight tooth meshing transmission, it is a breakthrough technology and means to solve the bottleneck problem of synchronous belt transmission technology. There are different characteristics of meshing performance in incomplete meshing region. In order to improve the performance of transmission system, two kinds of gear tooth shapes with and without meshing performance are studied. On this basis, based on the existing research results, With the aid of the contact order meshing theory of high order contact with equal conjugate curvature, it is deduced that the contact strength of tooth surface is high, with small transmission clearance, friendly cooperative relationship of tooth shape, and high contact strength of tooth surface. The third order infinitesimal arc tooth profile of the contact point is used as the normal tooth profile model of the synchronous belt drive of the herringbone tooth. By using the mapping method of the elastic mechanics complex variable function, the calculation model of the normal tooth profile parameters and the relationship between the load and the stress of the belt tooth is established. The influence of tooth shape parameters on the stress of the belt tooth is studied, and the coupling relation and variation law among the parameters are revealed. The main parameters influencing the stress variation of belt teeth are determined. The nonlinear finite element analysis model of coupling contact between belt teeth and gear teeth is established, and the helical angle, side gap and belt gear structure are studied. The influence law of stress and deformation of the strength layer is determined and the important influence parameters are determined. The three-dimensional mathematical simulation model of the meshing transmission of the new tooth profile in the complete and incomplete meshing region is established, and the tooth profile and pitch difference are studied. The influence of helical angle and other parameters on the interference of meshing transmission is revealed. The relationship between the profile of tooth interference and the parameters is revealed. The transmission structure and tooth shape parameters are optimized. The research on the synchronous belt of the new tooth profile and the key manufacturing technology of the belt wheel is carried out. The design system of the quadratic envelope of the tool with wheel and the tool with tooth and die is established. The meshing boundary line, the root tangent limit line, the instantaneous contact line and the secondary contact in the process of surface envelope are studied. In this paper, the causes of vibration in cutting are revealed, the method of eliminating vibration is provided, and the belt and sample belt are prepared. The transmission errors of the synchronous belt with the new tooth profile and the straight synchronous belt with the same end tooth profile are carried out. A geometric relation transmission model based on polygon effect of straight tooth synchronous belt is established, and the effect of polygon effect on transmission system is studied. The influence of velocity fluctuation error at the end of a new tooth profile on the dynamic transmission error of the herringbone synchronous belt with climbing teeth is established. The influence of bandwidth, spiral angle and the number of teeth on the transmission error is studied. The mechanism of high precision of herringbone drive is revealed. Helix rate is the key parameter to reduce transmission error, and the transmission error is the least when the helix ratio is equal to integer. The data collection of bench noise and fatigue wear experiment is analyzed and compared. The herringbone tooth is more stable than the straight tooth synchronous belt drive, and the transmission noise is lower. The noise experimental data are compared with the oblique teeth and the herringbone synchronous belt under the condition of resonance. The effect of noise reduction is slightly better. The tooth surface of the straight synchronous belt with 263 h of miter tooth has been observed by optical microscope after fatigue wear, and the wear position and degree of wear are consistent with the results of the theory of meshing interference wear, the wear position and the degree of wear are consistent with the theoretical results of meshing interference wear. The results show that the new tooth profile has higher belt strength than the straight tooth.
【學(xué)位授予單位】：哈爾濱工業(yè)大學(xué)
【學(xué)位級別】：博士
【學(xué)位授予年份】：2014
【分類號】：TH132.32
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本文編號：1597066