【摘要】：多齒輪并聯(lián)驅(qū)動機(jī)械系統(tǒng)是利用多個(gè)小齒輪驅(qū)動一個(gè)大齒輪，形成功率分流，是一種多點(diǎn)嚙合傳動機(jī)械系統(tǒng)，特別適用于大扭矩，低轉(zhuǎn)速等應(yīng)用場合。這種傳動形式廣泛應(yīng)用于盾構(gòu)掘進(jìn)機(jī)的回轉(zhuǎn)系統(tǒng)。這種冗余并聯(lián)驅(qū)動方式固然能夠提供巨大的驅(qū)動力，但由于在生產(chǎn)裝配過程中，，不可避免產(chǎn)生的制造和安裝誤差，以及驅(qū)動電機(jī)不同的安裝布置形式會使各個(gè)驅(qū)動支路傳遞的載荷大小不均勻，造成驅(qū)動電機(jī)偏載，嚴(yán)重的偏載會造成生產(chǎn)事故的發(fā)生。因此，有必要對多齒輪并聯(lián)傳動系統(tǒng)的載荷傳遞特性進(jìn)行研究，分析驅(qū)動電機(jī)不同布置形式對系統(tǒng)均載特性的影響，為工程實(shí)踐提供參考。 本文通過多齒輪并聯(lián)驅(qū)動回轉(zhuǎn)系統(tǒng)力傳遞實(shí)驗(yàn)，建立多齒輪并聯(lián)傳動系統(tǒng)的有限元計(jì)算模型，進(jìn)行系統(tǒng)的模態(tài)分析和靜力學(xué)、動力學(xué)載荷傳遞分析，研究了三個(gè)小齒輪不同安裝布置形式對系統(tǒng)均載特性的影響。最后建立了系統(tǒng)的集中參數(shù)模型，定義多齒輪并聯(lián)傳動系統(tǒng)的均載系數(shù)，利用Matlab/Simulink進(jìn)行動力學(xué)仿真，研究分析了重合度、小齒輪支承剛度以及安裝布置形式對系統(tǒng)均載特性的影響。結(jié)果表明重合度和小齒輪支撐剛度越大，系統(tǒng)的均載性越好；270°-180°-60°和180°-60°-0°兩種布置形式系統(tǒng)均載性較好，270°-180°-0°和270°-60°-0°兩種布置形式系統(tǒng)均載性較差。具體研究內(nèi)容如下： 首先以模擬盾構(gòu)機(jī)實(shí)驗(yàn)平臺的多齒輪并聯(lián)驅(qū)動回轉(zhuǎn)系統(tǒng)為對象，建立多齒輪同步驅(qū)動機(jī)械系統(tǒng)，設(shè)計(jì)完成相應(yīng)的控制軟件，采用實(shí)驗(yàn)平臺的加載器施加空載、扭矩和彎扭耦合三種不同的工況，通過控制軟件實(shí)現(xiàn)驅(qū)動電機(jī)的主、同兩種不同控制方式，通過變換驅(qū)動電機(jī)的安裝位置實(shí)現(xiàn)三個(gè)驅(qū)動電機(jī)四種不同安裝布置形式，分析研究不同工況、不同控制形式和不同安裝位置下驅(qū)動電機(jī)的載荷傳遞特性。 其次利用有限元軟件ABAQUS建立試驗(yàn)臺回轉(zhuǎn)系統(tǒng)有限元分析模型，通過系統(tǒng)的模態(tài)分析研究機(jī)械系統(tǒng)在約束工況下自身固有特性對傳動偏載的影響，設(shè)置不同的載荷施加方式實(shí)現(xiàn)純扭矩和彎扭耦合兩種不同的工況，分析小齒輪變載荷工況下，四種不同的布置形式下力傳遞特性，并建立多齒輪并聯(lián)傳動系統(tǒng)各齒輪嚙合面等效模型。 最后根據(jù)牛頓歐拉定理，在討論分析嚙合剛度的建模的基礎(chǔ)上，建立考慮了支承剛度，支承阻尼，齒輪的嚙合剛度，嚙合阻尼等參數(shù)的單齒輪驅(qū)動系統(tǒng)動力學(xué)集中參數(shù)模型。將模型推廣到包含三個(gè)齒輪驅(qū)動的多齒輪并聯(lián)傳動系統(tǒng)，定義多齒輪并聯(lián)傳動系統(tǒng)均載系數(shù)，建立Matlab/Simulink動力學(xué)仿真模型，研究多齒輪并聯(lián)驅(qū)動系統(tǒng)參數(shù)系統(tǒng)均載特性的影響，對不同安裝布置形式的多齒輪傳動系統(tǒng)載荷傳遞的均載進(jìn)行評價(jià)。
[Abstract]:Multi-gear parallel drive mechanical system is a kind of multi-point meshing transmission mechanical system, which uses multiple pinion gears to drive one big gear and forms power shunt. It is especially suitable for applications such as large torque, low speed and so on. This transmission form is widely used in the rotary system of shield tunneling machine. This redundant parallel drive mode can provide a huge driving force, but due to the inevitable manufacturing and installation errors in the production and assembly process, As well as the different installation and layout of the drive motor will make the load of each driving branch uneven resulting in the driving motor bias load serious bias load will cause the production accident. Therefore, it is necessary to study the load transfer characteristics of multi-gear parallel transmission system, and analyze the influence of different configuration of drive motor on the load sharing characteristics of the system, and provide a reference for engineering practice. In this paper, the finite element calculation model of the multi-gear parallel drive system is established through the force transfer experiment of the multi-gear parallel drive rotary system, and the modal analysis, statics and dynamic load transfer analysis of the system are carried out. The influence of three pinion gears on the load-sharing characteristics of the system was studied. Finally, the centralized parameter model of the system is established, and the load sharing coefficient of the multi-gear parallel transmission system is defined. The dynamic simulation is carried out by using Matlab/Simulink, and the degree of coincidence is studied and analyzed. The influence of the supporting stiffness and mounting arrangement of pinion on the load-sharing characteristics of the system. The results show that the greater the degree of coincidence and the stiffness of pinion bracing, the better the load average of the system, 270 擄-180 擄-60 擄and 180 擄-60 擄-0 擄, and 270 擄-180 擄-0 擄and 270 擄-60 擄-0 擄. The specific research contents are as follows: firstly, taking the multi-gear parallel drive rotary system of the shield machine experiment platform as the object, the multi-gear synchronous drive mechanical system is established, and the corresponding control software is designed and completed. The loaders of the experimental platform are used to apply no-load, torsion and bending and torsion coupling three different working conditions. The main driving motor is realized by the control software, the same two different control modes are realized. The load transfer characteristics of three driving motors under different working conditions, different control modes and different installation positions are analyzed and studied by changing the installation position of the three drive motors. Secondly, the finite element analysis model of the rotary system is established by using the finite element software ABAQUS, and the influence of the inherent characteristics of the mechanical system on the driving offset load under the constrained working condition is studied through the modal analysis of the system. Two different working conditions of pure torque and bending and torsional coupling are realized by setting different load application modes. The force transfer characteristics under four different arrangement forms are analyzed under variable load condition of pinion gear. The equivalent model of the meshing surface of each gear in the parallel transmission system is established. Finally, according to Newton Euler's theorem, based on the analysis of meshing stiffness modeling, a dynamic centralized parameter model of single gear drive system is established, which includes support stiffness, supporting damping, gear meshing stiffness, meshing damping and so on. The model is extended to the multi-gear parallel drive system with three gears, the load sharing coefficient of the multi-gear parallel drive system is defined, the Matlab/Simulink dynamic simulation model is established, and the influence of the load sharing characteristics of the multi-gear parallel drive system parameter system is studied. The load average load transfer of multi-gear transmission system with different installation and arrangement is evaluated.
【學(xué)位授予單位】：上海交通大學(xué)
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2013
【分類號】：TH132.41

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本文編號：2398099