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  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,提升系統(tǒng)的休止時間縮短,礦井的工作效率提高,同時系統(tǒng)的安裝和運行維護(hù)的費用也比較低,在煤礦行業(yè)深受歡迎。當(dāng)大噸位箕斗使用曲軌自動卸載的方式時,所需閘門的開啟力增大,曲軌的受力也會成倍地增加,而且曲軌的受力很不均勻,導(dǎo)致卸載輪和曲軌過度的磨損,從而造成安全隱患,給企業(yè)帶來不必要的損失。本文以32t上開式扇形閘門箕斗為研究對象,以優(yōu)化曲軌曲線的形狀為目標(biāo),對現(xiàn)有卸載曲軌的不足進(jìn)行分析,研究對比4種卸載曲軌在工作時的受力情況,從而找到更加適合于32t箕斗的卸載曲軌的形狀。本文的研究內(nèi)容如下:(1)首先對上開式扇形閘門箕斗的結(jié)構(gòu)特點和工作原理進(jìn)行分析,提出箕斗在卸載過程中可能出現(xiàn)的問題;然后對曲軌的受力進(jìn)行理論計算,找到曲軌受力的影響因素;最后創(chuàng)建箕斗的實體模型;(2)針對在箕斗卸載過程中出現(xiàn)的問題,運用理論知識對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)過計算獲得箕斗在每一種曲軌中運行時閘門開啟的角速度和角加速度曲線,通過對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)建各個曲軌的實體模型,在裝配模塊中將各個曲軌分別與箕斗進(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曲軌中運行時的曲軌受力圖以及卸載輪的速度圖和加速度圖,驗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,并對理想卸載曲軌的接觸疲勞強(qiáng)度進(jìn)行校核,驗證曲軌是否滿足材料的強(qiáng)度要求。使用Abaqus軟件對卸載曲軌進(jìn)行有限元分析,并與理論計算進(jìn)行對比,說明理論計算的正確性。
[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)位級別】：碩士
【學(xué)位授予年份】：2015
【分類號】：TD531.1

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本文編號：1757014