發(fā)布時(shí)間：2018-04-16 03:07

  本文選題：大噸位箕斗 + 卸載曲軌�。� 參考：《河北工程大學(xué)》2015年碩士論文

【摘要】：曲軌自動(dòng)卸載是礦井箕斗常用的一種卸載方式,當(dāng)箕斗使用這種卸載方式時(shí),提升系統(tǒng)的休止時(shí)間縮短,礦井的工作效率提高,同時(shí)系統(tǒng)的安裝和運(yùn)行維護(hù)的費(fèi)用也比較低,在煤礦行業(yè)深受歡迎。當(dāng)大噸位箕斗使用曲軌自動(dòng)卸載的方式時(shí),所需閘門的開(kāi)啟力增大,曲軌的受力也會(huì)成倍地增加,而且曲軌的受力很不均勻,導(dǎo)致卸載輪和曲軌過(guò)度的磨損,從而造成安全隱患,給企業(yè)帶來(lái)不必要的損失。本文以32t上開(kāi)式扇形閘門箕斗為研究對(duì)象,以優(yōu)化曲軌曲線的形狀為目標(biāo),對(duì)現(xiàn)有卸載曲軌的不足進(jìn)行分析,研究對(duì)比4種卸載曲軌在工作時(shí)的受力情況,從而找到更加適合于32t箕斗的卸載曲軌的形狀。本文的研究?jī)?nèi)容如下:(1)首先對(duì)上開(kāi)式扇形閘門箕斗的結(jié)構(gòu)特點(diǎn)和工作原理進(jìn)行分析,提出箕斗在卸載過(guò)程中可能出現(xiàn)的問(wèn)題;然后對(duì)曲軌的受力進(jìn)行理論計(jì)算,找到曲軌受力的影響因素;最后創(chuàng)建箕斗的實(shí)體模型;(2)針對(duì)在箕斗卸載過(guò)程中出現(xiàn)的問(wèn)題,運(yùn)用理論知識(shí)對(duì)4種曲軌卸載曲線進(jìn)行研究并創(chuàng)建其數(shù)學(xué)模型,經(jīng)過(guò)計(jì)算獲得箕斗在每一種曲軌中運(yùn)行時(shí)閘門開(kāi)啟的角速度和角加速度曲線,通過(guò)對(duì)比分析找到理想的卸載曲線;(3)在三維建模軟件中分別創(chuàng)建各個(gè)曲軌的實(shí)體模型,在裝配模塊中將各個(gè)曲軌分別與箕斗進(jìn)行裝配,然后將所建立的箕斗和曲軌實(shí)體模型保存成通用格式導(dǎo)入到仿真軟件中,進(jìn)行仿真得到箕斗在各個(gè)曲軌中運(yùn)行時(shí)的曲軌受力圖以及卸載輪的速度圖和加速度圖,驗(yàn)證理想卸載曲軌的正確性。(4)分析卸載曲軌的主要磨損形式,并對(duì)理想卸載曲軌的接觸疲勞強(qiáng)度進(jìn)行校核,驗(yàn)證曲軌是否滿足材料的強(qiáng)度要求。使用Abaqus軟件對(duì)卸載曲軌進(jìn)行有限元分析,并與理論計(jì)算進(jìn)行對(duì)比,說(shuō)明理論計(jì)算的正確性。
[Abstract]:Automatic unloading of curved rail is a commonly used unloading mode of mine skip. When skip uses this unloading mode, the rest time of the lifting system is shortened, the working efficiency of mine is improved, and the cost of installation and operation and maintenance of the system is also relatively low.It is very popular in the coal industry.When the high-tonnage skip uses the mode of automatic unloading of the curved rail, the opening force of the required gate increases and the force on the curved rail increases exponentially, and the force on the curved rail is very uneven, which results in excessive wear and tear of the unloading wheel and the curved rail.Thus causes the security hidden danger, brings the unnecessary loss to the enterprise.In this paper, taking the skip of 32t open sector gate as the research object and optimizing the curve shape of the curved rail, the deficiency of the existing unloading curved rail is analyzed, and the stress situation of the four kinds of unloading curved rail is studied and compared.Thus, the shape of the unloading curved rail is found, which is more suitable for the 32 t skip.The main contents of this paper are as follows: (1) firstly, the structural characteristics and working principle of the upper open sector gate skip are analyzed, and the problems that may occur in the unloading process of the skip are put forward, and then the force acting on the curved rail is calculated theoretically.Finally, to find out the factors that affect the load of curved rail, and finally to create the solid model of skip, aiming at the problems in the process of skip unloading, the paper studies the unloading curves of four kinds of curved rails by using theoretical knowledge and establishes its mathematical model.Through calculation, the angular velocity and angular acceleration curves of the gate opening when the skip is running in each kind of curved rail are obtained, and the ideal unloading curve is found through comparative analysis. (3) the solid models of each curved rail are created in the 3D modeling software, respectively.In the assembly module, each curved rail is assembled with the skip separately, and then the established skip and curved rail entity model is saved into the common format and imported into the simulation software.The stress diagram and velocity diagram and acceleration diagram of the unloading wheel are obtained by simulation. The correctness of the ideal unloading curved rail is verified. (4) the main wear forms of the unloading curved rail are analyzed.The contact fatigue strength of ideal unloading curved rail is checked to verify whether the rail meets the material strength requirement.The finite element analysis of unloading curved rail is carried out by using Abaqus software, and compared with the theoretical calculation, the correctness of the theoretical calculation is proved.
【學(xué)位授予單位】：河北工程大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2015
【分類號(hào)】：TD531.1

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本文編號(hào)：1757014