發(fā)布時(shí)間：2019-02-28 10:18

【摘要】：槽輪機(jī)構(gòu)以其結(jié)構(gòu)簡(jiǎn)單,傳動(dòng)效率高,工作可靠,設(shè)計(jì)和制造方便,以及能較平穩(wěn)、間歇進(jìn)行轉(zhuǎn)位等優(yōu)點(diǎn),廣泛應(yīng)用于自動(dòng)機(jī)械傳動(dòng)裝置中。但是槽輪機(jī)構(gòu)在工作時(shí)有沖擊,引起運(yùn)動(dòng)系統(tǒng)振動(dòng),其適用范圍受到一定的限制。研究表明引起槽輪機(jī)構(gòu)沖擊振動(dòng)的原因包括兩方面：一方面是圓柱銷進(jìn)出槽輪槽時(shí)的柔性沖擊,另外一方面是由運(yùn)動(dòng)副之間間隙引起碰撞而產(chǎn)生。目前,國(guó)內(nèi)外關(guān)于槽輪機(jī)構(gòu)間隙接觸碰撞的研究還比較少,因此,對(duì)槽輪機(jī)構(gòu)的間隙接觸碰撞副進(jìn)行動(dòng)力學(xué)研究是有實(shí)際意義的。 對(duì)于槽輪機(jī)構(gòu)間隙接觸碰撞問(wèn)題的研究,重點(diǎn)是解決其建模和計(jì)算問(wèn)題,使動(dòng)力學(xué)研究更加接近其真實(shí)過(guò)程,以達(dá)到改進(jìn)設(shè)計(jì)、減少費(fèi)用、降低振動(dòng)和噪聲的目的。本文利用彈性碰撞理論,基于開關(guān)鍵合圖建模理論和20-sim仿真軟件,對(duì)槽輪機(jī)構(gòu)間隙接觸碰撞問(wèn)題展開研究,同時(shí)對(duì)槽輪機(jī)構(gòu)動(dòng)力學(xué)特性進(jìn)行分析,比較了機(jī)構(gòu)的理想狀態(tài)與含間隙碰撞副的不同動(dòng)態(tài)特性,從而說(shuō)明運(yùn)動(dòng)副間隙很大程度上影響槽輪機(jī)構(gòu)的運(yùn)動(dòng)特性,使機(jī)構(gòu)的實(shí)際運(yùn)動(dòng)和理想運(yùn)動(dòng)之間產(chǎn)生偏差,并且運(yùn)動(dòng)副間隙之間產(chǎn)生碰撞,引起構(gòu)件的振動(dòng),產(chǎn)生噪聲,加速磨損,降低工作效率。 本文的研究表明,利用彈性碰撞理論中的彈簧-阻尼模型對(duì)槽輪機(jī)構(gòu)間隙接觸碰撞問(wèn)題的研究,比較接近槽輪機(jī)構(gòu)的實(shí)際運(yùn)動(dòng)狀態(tài),而且開關(guān)鍵合圖建模理論在槽輪機(jī)構(gòu)動(dòng)態(tài)特性研究時(shí)工作過(guò)程離散化的處理中建模方法簡(jiǎn)單,最后,利用基于鍵合圖理論的仿真軟件20-sim對(duì)槽輪機(jī)構(gòu)開關(guān)鍵合圖模型仿真,得到仿真結(jié)果表明所建立的系統(tǒng)動(dòng)力學(xué)模型是正確有效的,與傳統(tǒng)的動(dòng)力學(xué)分析方法相比,模型正確且更簡(jiǎn)明,更適合計(jì)算機(jī)仿真計(jì)算,為槽輪機(jī)構(gòu)動(dòng)態(tài)特性的研究提供了一種新方法與途徑。
[Abstract]:With the advantages of simple structure, high transmission efficiency, reliable work, convenient design and manufacture, stable and intermittent transposition, the slotted wheel mechanism is widely used in automatic mechanical transmission devices. However, the slotted-wheel mechanism has the impact when it works, which causes the vibration of the moving system, and its application range is limited to a certain extent. The research shows that the impact vibration of the grooved wheel mechanism is caused by two aspects: one is the flexible impact caused by the cylindrical pin in and out of the groove wheel slot, the other is the collision caused by the clearance between the moving pairs. At present, there is little research on gap contact collision of grooved wheel mechanism at home and abroad. Therefore, it is of practical significance to study the dynamics of gap contact collision pair of grooved wheel mechanism. In order to improve the design, reduce the cost and reduce the vibration and noise, the research on the gap contact collision of the grooved wheel mechanism is focused on solving its modeling and calculation problems, and making the dynamics research closer to its real process in order to achieve the purpose of improving the design, reducing the cost and reducing the vibration and noise. Based on the theory of elastic collision, based on the open key graph modeling theory and 20-sim simulation software, the problem of gap contact collision of grooved wheel mechanism is studied in this paper, and the dynamic characteristics of grooved wheel mechanism are analyzed at the same time. The ideal state of the mechanism is compared with the different dynamic characteristics of the collision pair with clearance, which shows that the clearance of the pair of motion has a great influence on the motion characteristics of the slotted-wheel mechanism, which causes the deviation between the actual motion and the ideal motion of the mechanism. And the collision between the clearance of the moving pair causes the vibration of the component, produces noise, accelerates wear, and reduces the working efficiency. The research in this paper shows that the spring-damping model in elastic collision theory is more close to the actual motion state of the grooved-wheel mechanism in the study of the gap contact collision problem of the grooved-wheel mechanism. Moreover, the modeling method is simple in the discretization of the working process in the study of the dynamic characteristics of the grooved mechanism. Finally, the key graph model of the slotted mechanism is simulated by using the simulation software 20-sim based on the bond graph theory. The simulation results show that the established system dynamics model is correct and effective. Compared with the traditional dynamic analysis method, the model is correct and more concise, and more suitable for computer simulation calculation. A new method and approach is provided for the study of dynamic characteristics of slotted mechanism.
【學(xué)位授予單位】：中南大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2012
【分類號(hào)】：TH112

【引證文獻(xiàn)】

相關(guān)碩士學(xué)位論文 前1條

1 施政達(dá);斗笠式刀庫(kù)槽輪傳動(dòng)裝置的設(shè)計(jì)與研究[D];內(nèi)蒙古農(nóng)業(yè)大學(xué);2013年

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本文編號(hào)：2431724