本文關(guān)鍵詞： 換擋機(jī)構(gòu) 換擋性能 虛擬樣機(jī) 動(dòng)力學(xué)仿真　出處：《中國(guó)礦業(yè)大學(xué)》2015年碩士論文　論文類型：學(xué)位論文

【摘要】：防爆柴油機(jī)車具有牽引力大、過載能力強(qiáng)、工作效率高、機(jī)動(dòng)靈活等特點(diǎn),廣泛使用于煤礦井下的軌道運(yùn)輸。防爆柴油機(jī)車的換擋操作復(fù)雜,駕駛員操作難度大,另外,井下的工作環(huán)境惡劣,長(zhǎng)時(shí)間緊張的工作容易使駕駛員出現(xiàn)駕駛疲勞,從而導(dǎo)致誤操作,甚至發(fā)生事故。為了使防爆柴油機(jī)車的換擋操作更加簡(jiǎn)便,降低駕駛員的工作強(qiáng)度,使用手動(dòng)循環(huán)換擋機(jī)構(gòu)代替當(dāng)前的換擋機(jī)構(gòu)。手動(dòng)循環(huán)換擋機(jī)構(gòu)由普通手動(dòng)換擋機(jī)構(gòu)改進(jìn)而來,只設(shè)置升檔和降檔兩個(gè)檔位,簡(jiǎn)化了換擋操作,降低了駕駛?cè)藛T的操作強(qiáng)度,對(duì)防爆柴油機(jī)車的推廣具有積極作用。本文借助于虛擬樣機(jī)技術(shù)對(duì)手動(dòng)循環(huán)換擋機(jī)構(gòu)的換擋性能進(jìn)行了研究,對(duì)手動(dòng)循環(huán)換擋機(jī)構(gòu)的設(shè)計(jì)及在防爆柴油機(jī)車上的應(yīng)用具有參考價(jià)值。首先,介紹手動(dòng)循環(huán)換擋機(jī)構(gòu)的結(jié)構(gòu)組成及工作原理,分析同步器的同步過程,以普通汽車為例探討換擋性能的評(píng)價(jià)方法。其次,對(duì)手動(dòng)循環(huán)換擋機(jī)構(gòu)的換擋過程和同步器同步理論模型進(jìn)行分析,得出影響換檔過程的關(guān)鍵參數(shù),研究各個(gè)參數(shù)的計(jì)算方法,為建立手動(dòng)循環(huán)換擋機(jī)構(gòu)虛擬樣機(jī)提供理論依據(jù)。然后,以CCG8型防爆柴油機(jī)車為例,使用三維建模軟件CATIA、接口軟件Sim Designer和多體動(dòng)力學(xué)仿真軟件ADAMS建立手動(dòng)循環(huán)換擋機(jī)構(gòu)的虛擬樣機(jī)模型。結(jié)合實(shí)際工況,對(duì)手動(dòng)循環(huán)換擋機(jī)構(gòu)的升檔和降檔過程、不同換擋速度及變速鼓凸輪槽升角對(duì)換擋力的影響進(jìn)行動(dòng)力學(xué)仿真分析,通過仿真得出的換擋力曲線分析其換擋性能。得出以下結(jié)論:(1)一檔升二檔及二檔降一檔過程的二次沖擊力與最大換擋力的比值稍大,其他換擋過程的最大換擋力和二次沖擊力均在合理的范圍內(nèi),駕駛員換擋操作輕便舒適,手動(dòng)循環(huán)換擋機(jī)構(gòu)具有較好的換擋性能;(2)駕駛員的換擋速度越快,換擋過程中的最大換擋力和二次沖擊力越大,車速下降幅度越小;(3)變速鼓凸輪槽升角越大,換擋過程中的最大換擋力和二次沖擊力越大,設(shè)計(jì)凸輪槽升角時(shí),需要綜合考慮換擋性能及變速鼓直徑兩方面因素。最后,對(duì)全文進(jìn)行總結(jié),并對(duì)后續(xù)相關(guān)研究進(jìn)行展望。
[Abstract]:Explosion-proof diesel locomotives are widely used in underground rail transportation of coal mine with the characteristics of large traction, strong overload capacity, high working efficiency, flexibility, etc. The shift operation of explosion-proof diesel locomotives is complicated, and the operation of the drivers is difficult, in addition, the anti-explosion diesel locomotives are difficult to operate. In order to make the shift operation of explosion-proof diesel locomotive more convenient and reduce the driver's working intensity, the downhole working environment is bad, the long time intense work easily causes the driver to appear the driving fatigue, thus causes the wrong operation, even causes the accident, in order to make the flameproof diesel locomotive shift operation easier, reduces the driver's working intensity, The manual circulation gearshift mechanism is improved by the ordinary manual gear shifting mechanism, and only two gears are set up, which simplifies the shift operation and reduces the operating intensity of the driver. This paper studies the shift performance of manual circulation gear shifting mechanism with the help of virtual prototyping technology, which has a positive effect on the popularization of explosion-proof diesel locomotives. It has reference value for the design of manual circulation shift mechanism and its application in explosion-proof diesel engine. Firstly, the structure composition and working principle of manual circulation shift mechanism are introduced, and the synchronous process of synchronizer is analyzed. Taking ordinary automobile as an example, the evaluation method of gear shifting performance is discussed. Secondly, the shift process and synchronizer synchronization theoretical model of manual circulation shift mechanism are analyzed, and the key parameters affecting the shift process are obtained, and the calculation methods of each parameter are studied. This paper provides a theoretical basis for the establishment of virtual prototype of manual circulation gear shifting mechanism. Then, taking CCG8 type explosion-proof diesel locomotive as an example, The virtual prototype model of manual circulating gear shifting mechanism is established by using 3D modeling software CATIA, interface software Sim Designer and multi-body dynamics simulation software ADAMS. The dynamic simulation analysis of the influence of different gear shifting speed and the groove rising angle of the variable speed drum cam on the shift force is carried out. The shift force curve obtained by simulation is used to analyze its shift performance. The following conclusions are drawn: 1) the ratio of the second impact force to the maximum gear shift force in the process of first and second gear up and down first gear is slightly larger, and the ratio of the second impact force to the maximum gear shift force is slightly larger than that of the second gear shift force. The maximum shift force and secondary impact force of other gear shifting process are all in the reasonable range, the driver shift operation is light and comfortable, the manual circulation shift mechanism has better shift performance and the driver's shift speed is faster, The greater the maximum shift force and the second impact force in the shifting process, the smaller the decreasing amplitude of the speed, the bigger the rising angle of the cam slot of the variable speed drum cam, the greater the maximum shift force and the secondary impact force in the shifting process, when designing the rising angle of the cam groove, Need to consider shift performance and variable drum diameter two factors. Finally, the full text is summarized, and the future related research is prospected.
【學(xué)位授予單位】：中國(guó)礦業(yè)大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2015
【分類號(hào)】：TD684

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本文編號(hào)：1520520