本文選題：履帶式挖掘機(jī)　切入點(diǎn)：行走減速機(jī)構(gòu)　出處：《吉林大學(xué)》2011年碩士論文　論文類型：學(xué)位論文

【摘要】：隨著國(guó)民經(jīng)濟(jì)的快速發(fā)展,挖掘機(jī)作為開采露天礦的重要設(shè)備之一,其作用和地位越來(lái)越突出。對(duì)于大型礦用挖掘機(jī)而言,無(wú)論是回轉(zhuǎn)機(jī)構(gòu)、推壓機(jī)構(gòu)、提升機(jī)構(gòu)或行走機(jī)構(gòu)均利用到齒輪傳動(dòng)裝置進(jìn)行動(dòng)力傳遞,齒輪傳動(dòng)機(jī)構(gòu)是機(jī)械設(shè)備中應(yīng)用非常廣泛的部件,它的失效和損傷經(jīng)常會(huì)造成傳動(dòng)系統(tǒng)或整機(jī)出現(xiàn)不同程度的故障,嚴(yán)重的會(huì)導(dǎo)致重大安全事故發(fā)生。因此,研究齒輪傳動(dòng)機(jī)構(gòu)運(yùn)動(dòng)機(jī)理可以為避免故障的發(fā)生及提高機(jī)械傳動(dòng)系統(tǒng)性能等提供基礎(chǔ)理論依據(jù)。 行走系統(tǒng)是挖掘機(jī)的重要組成部分之一,本文采用的是履帶式行走機(jī)構(gòu),其在作業(yè)和行駛過(guò)程中,承受挖掘機(jī)工作時(shí)的各種動(dòng)態(tài)載荷。而行走減速器又是行走系統(tǒng)的主要組成部件之一,是動(dòng)力傳輸?shù)暮诵臋C(jī)構(gòu),所以,對(duì)于大型重載的礦用挖掘機(jī),其行走減速機(jī)構(gòu)更應(yīng)具有高效及高可靠性的傳動(dòng)結(jié)構(gòu),從而可以提高整機(jī)作業(yè)的經(jīng)濟(jì)型,創(chuàng)造出更大的社會(huì)效益。 本論文在閱讀大量的參考文獻(xiàn)和深入的理論學(xué)習(xí)基礎(chǔ)上,主要工作如下： (1)闡述履帶式挖掘機(jī)的國(guó)內(nèi)外發(fā)展現(xiàn)狀和趨勢(shì),并把國(guó)內(nèi)外的技術(shù)研究狀況進(jìn)行比較。在全球機(jī)械行業(yè)高新技術(shù)水平競(jìng)爭(zhēng)日益激烈的環(huán)境下,盡管國(guó)內(nèi)挖掘機(jī)的設(shè)計(jì)研發(fā)水平與先進(jìn)技術(shù)還存在一定的差距,但是我們也看到這種差距在逐步縮小,并已形成有一定國(guó)際競(jìng)爭(zhēng)力的自主品牌。對(duì)于挖掘機(jī)行走系統(tǒng)的核心部件——行走減速器的發(fā)展?fàn)顩r和先進(jìn)的設(shè)計(jì)水平進(jìn)行系統(tǒng)的闡述。 (2)對(duì)履帶式行走減速機(jī)構(gòu)的結(jié)構(gòu)進(jìn)行分析,得出定軸齒輪傳動(dòng)及行星齒輪傳動(dòng)中相嚙合輪齒的受力特點(diǎn),計(jì)算出定軸傳動(dòng)中主、從動(dòng)輪和行星齒輪傳動(dòng)中太陽(yáng)輪、行星輪的輪齒受力。經(jīng)過(guò)對(duì)定軸齒輪傳動(dòng)及行星齒輪傳動(dòng)中重合度的計(jì)算,得出相嚙合輪齒的齒對(duì)特點(diǎn),采用石川公式對(duì)一級(jí)定軸減速主從動(dòng)輪和二級(jí)行星減速太陽(yáng)輪與行星輪間的單、雙齒嚙合剛度進(jìn)行計(jì)算,得到主從動(dòng)輪和太陽(yáng)輪與行星輪間的綜合時(shí)變嚙合剛度。 (3)基于三維設(shè)計(jì)軟件UG對(duì)行走減速機(jī)構(gòu)進(jìn)行建模,并將其通過(guò)接口文件導(dǎo)入到工程應(yīng)用軟件ADAMS中。在不影響仿真分析結(jié)果的原則上,對(duì)已建立模型進(jìn)行適當(dāng)?shù)煤?jiǎn)化,確保仿真分析能在ADAMS軟件中高效順利的進(jìn)行。對(duì)行走減速機(jī)構(gòu)施加約束和接觸力,建立起剛性體動(dòng)力學(xué)仿真模型,計(jì)算確定施加到系統(tǒng)輸入端和輸出端上的驅(qū)動(dòng)轉(zhuǎn)速、轉(zhuǎn)矩和負(fù)載轉(zhuǎn)矩。進(jìn)行動(dòng)力學(xué)仿真后,對(duì)行走減速機(jī)構(gòu)的一級(jí)定軸減速主從齒輪間和二級(jí)行星減速太陽(yáng)輪與行星輪間的嚙合力進(jìn)行時(shí)域和頻域的分析,并對(duì)一級(jí)和二級(jí)減速中的輸出轉(zhuǎn)速進(jìn)行對(duì)比分析。經(jīng)過(guò)一級(jí)定軸減速主從齒輪間和二級(jí)行星減速太陽(yáng)輪與行星輪間嚙合力的理論計(jì)算結(jié)果與仿真結(jié)果對(duì)比,得出二級(jí)行星減速中第二行星排太陽(yáng)輪與行星輪間的嚙合力最大且振動(dòng)明顯。 (4)引入剛?cè)狁詈侠碚?由于第二行星排太陽(yáng)輪所受載荷最大,故把該太陽(yáng)輪在ANSYS軟件中進(jìn)行柔性化,導(dǎo)入ADAMS分析軟件進(jìn)行剛?cè)狁詈蟿?dòng)力學(xué)分析,對(duì)其強(qiáng)度進(jìn)行校核,把剛?cè)狁詈戏治鲋行行羌艿妮敵鲛D(zhuǎn)速與剛性體分析所得該行星架的輸出轉(zhuǎn)速進(jìn)行對(duì)比,并對(duì)第二行星排柔性體太陽(yáng)輪與行星輪間的嚙合力進(jìn)行時(shí)域和頻域的分析及與剛性體仿真結(jié)果進(jìn)行對(duì)比。
[Abstract]:With the rapid development of the national economy, as one of the important equipment in mining excavator in open-pit mine, its role and status is more and more serious. For the large mining excavator, both the slewing mechanism, pushing mechanism, lifting mechanism and the walking mechanism are used to gear transmission device for power transmission gear is widely used parts of the mechanical equipment, its failure and damage often caused by the transmission system or the failure of different degree, serious can lead to the occurrence of major accidents. Therefore, the motion of gear transmission mechanism can provide theoretical basis for avoiding the occurrence and improve the performance of mechanical transmission system fault.
Walking system is an important part of the excavator, this paper is a crawler type walking mechanism, the driving in the operation and process under dynamic loads. When the excavator and walking speed reducer is one of the main parts of the walking system, is the core of power transmission mechanism, so for large mining excavator the heavy, the walking reducer should have high performance and high reliability of the transmission structure, which can improve the economy of the machine operation, to create greater social benefits.
On the basis of reading a large number of references and in-depth theoretical study, the main work of this paper is as follows:
(1) describes the current status of Crawler excavators at home and abroad and the trend, and compare technology research status at home and abroad. In the high-tech level of global machinery industry in an increasingly competitive environment, although there is still a gap between the domestic excavator design level and advanced technology, but we also see the gap gradually narrow, and has formed a certain international competitiveness of the brand. The development status of the reducer and the advanced design level is introduced for core - excavator walking components system.
(2) the crawler walking speed reducer structure analysis, the fixed axis gear and planetary gear transmission gear meshing force characteristics, calculated in the main drive shaft, a driven wheel and a planetary gear drive sun gear, planetary gear tooth stress. Through calculating the coincidence degree of the set the shaft gear and the planetary gear drive, the meshing gear teeth on the characteristics, using the Ishikawa formula to a fixed axis gear driven pulley and two reduction planetary sun gear and planetary gear between single and double teeth meshing stiffness calculation, get the driven pulley and sun gear and planetary integration varying meshing stiffness.
(3) the 3D design software UG to walk gear modeling based on, and through the interface file into the engineering application software ADAMS. In the simulation analysis of the impact of the principle, the established models were appropriately simplified, ensure the simulation analysis in ADAMS software can be implemented smoothly and efficiently. The walking speed reducer the constraint mechanism and contact force, establish the rigid body dynamics simulation model, calculate and determine the drive speed system is applied to the input and output of the torque and load torque. The dynamic simulation, analysis of the mechanism of a walking speed reducer fixed axis gear reducer master-slave and two stage planetary sun gear and planetary gear the meshing force of time and frequency, and the output speed reducer in grade one and grade two were analyzed. After a fixed axis gear reducer master-slave and two stage planetary gear sun wheel Compared with the theoretical calculation results of meshing force between the planetary gear and the simulation results, it is concluded that the meshing force between the second planetary planetary gear and the planetary gear is the largest and the vibration is obvious in the two stage planetary deceleration.
(4) the introduction of the theory of rigid flexible coupling, the second planet row sun gear load maximum, so the sun wheel is flexible in ANSYS software, import the ADAMS software to analyze the rigid flexible coupling dynamics, check its strength, the coupled analysis of the output speed and rigid body in the planetary frame analysis output speed the planet carrier income were compared, and the second flexible planetary sun gear and planetary gear meshing force between time domain and frequency domain analysis and the simulation results are compared with the rigid body.

【學(xué)位授予單位】：吉林大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2011
【分類號(hào)】：TD422.2;TH112

【引證文獻(xiàn)】

相關(guān)碩士學(xué)位論文 前1條

1 鄧強(qiáng);新型Hy-Vo齒形鏈的剛?cè)狁詈辖佑|動(dòng)力學(xué)分析及試驗(yàn)研究[D];吉林大學(xué);2012年

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本文編號(hào)：1559490