本文選題：礦用液壓吊裝機(jī) + 吊臂��； 參考：《安徽理工大學(xué)》2015年碩士論文

【摘要】：我國采煤技術(shù)迅猛發(fā)展和機(jī)械化采掘程度飛速提高,已經(jīng)大大縮短了綜采工作面連續(xù)作業(yè)時(shí)間。那么,煤礦面臨一個(gè)緊急而重要的問題,那就是盡快提高采區(qū)工作連續(xù)率,并且有效降低采區(qū)設(shè)備搬運(yùn)時(shí)間。針對傳統(tǒng)方法存在效率低下、安全隱患多、工人勞動(dòng)強(qiáng)度大等問題,國內(nèi)相關(guān)企業(yè)研發(fā)了一種煤礦井下移動(dòng)式起吊設(shè)備,它不僅能保證工作人員的安全,而且可以提高工效。 本論文以某公司研發(fā)的伸縮臂式礦用液壓吊裝機(jī)為研究對象。首先,進(jìn)行吊臂結(jié)構(gòu)分析,介紹吊臂的結(jié)構(gòu)和工作原理,分析吊臂受力情況,建立有限元模型,進(jìn)行有限元軟件分析,最后獲得吊臂相應(yīng)的應(yīng)力、位移和安全系數(shù)云圖,得到最大應(yīng)力值是298Mpa,安全系數(shù)是2.78,驗(yàn)證了吊臂工作的安全可靠性；吊臂屬于變幅機(jī)構(gòu)中的重要部件,基于等效元素法思想,列出運(yùn)動(dòng)微分方程,采用Matlab軟件進(jìn)行方程求解計(jì)算,得到系統(tǒng)的動(dòng)力響應(yīng)曲線,為后續(xù)的礦用液壓吊裝機(jī)多剛體動(dòng)力學(xué)仿真分析奠定了良好的基礎(chǔ)。 針對礦用液壓吊裝機(jī)變幅機(jī)構(gòu)工作時(shí),變幅油缸液壓力偏大的問題,分析主要原因是由于吊臂起升而引起沖擊振動(dòng)以及重要鉸點(diǎn)分布位置不合理。利用ADAMS軟件建立礦用液壓吊裝機(jī)變幅機(jī)構(gòu)模型,進(jìn)行動(dòng)力學(xué)仿真,獲得了液壓缸驅(qū)動(dòng)函數(shù)和液壓缸液壓力最大值為6.4909×105N,起升速度曲線變化范圍是0.745°/s到0.755°/s之間。為了降低變幅液壓缸液壓力的值,建立變幅機(jī)構(gòu)三鉸點(diǎn)數(shù)學(xué)模型,通過優(yōu)化設(shè)計(jì)三鉸點(diǎn)位置,獲得三鉸點(diǎn)最優(yōu)化位置,此時(shí)液壓缸液壓力達(dá)到最小值6.0359×105N,遠(yuǎn)小于所選液壓缸的額定液壓力6.4×105N,這保證液壓缸的使用安全性。解決了由于吊臂三鉸點(diǎn)位置不合理而引起變幅液壓缸液壓力偏大的問題,為礦用液壓吊裝機(jī)的結(jié)構(gòu)改進(jìn)提供合理有效的理論依據(jù)。
[Abstract]:With the rapid development of coal mining technology and the rapid improvement of mechanized mining in China, the continuous working time of fully mechanized mining face has been greatly shortened. Therefore, the coal mine is faced with an urgent and important problem, that is, to improve the working continuity rate of mining area as soon as possible, and to effectively reduce the handling time of equipment in mining area. Aiming at the problems of low efficiency, high safety hidden danger and heavy labor intensity in traditional methods, domestic enterprises have developed a kind of mobile lifting equipment in coal mine, which can not only guarantee the safety of workers, but also improve the working efficiency. This paper takes the telescopic arm hydraulic hoisting machine developed by a company as the research object. Firstly, the structure of the boom is analyzed, the structure and working principle of the boom are introduced, the stress of the boom is analyzed, the finite element model is established, the finite element software analysis is carried out, and the corresponding stress, displacement and safety factor cloud diagram of the boom are obtained. The maximum stress value is 298 Mpaand the safety factor is 2.78, which verifies the safety reliability of the boom, and the boom belongs to the important part of the luffing mechanism. Based on the idea of equivalent element method, the differential equation of motion is listed, and the equation is solved by Matlab software. The dynamic response curve of the system is obtained, which lays a good foundation for the subsequent multi-rigid body dynamics simulation analysis of mine hydraulic hoisting machine. In view of the problem that the hydraulic force of the luffing cylinder of the hydraulic hoisting machine is on the high side, the main reasons are the shock vibration caused by the lifting of the boom and the unreasonable distribution of the important hinge point. The ADAMS software is used to set up the amplitude change mechanism model of mine hydraulic hoisting machine. The dynamic simulation results show that the driving function of hydraulic cylinder and the maximum hydraulic force of hydraulic cylinder are 6.4909 脳 10 ~ 5N, and the rising speed curve varies from 0.745 擄/ s to 0.755 擄/ s. In order to reduce the hydraulic pressure of the variable amplitude hydraulic cylinder, the mathematical model of the three hinge point of the luffing mechanism is established, and the optimum position of the three hinge point is obtained by optimizing the position of the three hinge point. At this point, the hydraulic force of the cylinder reaches the minimum value of 6.0359 脳 105 N, which is far less than the rated hydraulic force of the selected cylinder of 6.4 脳 10 5 N, which ensures the safety of the hydraulic cylinder. This paper solves the problem that the hydraulic force of the variable amplitude hydraulic cylinder is too large due to the unreasonable position of the three hinges of the boom, and provides a reasonable and effective theoretical basis for the structural improvement of the hydraulic hoisting machine used in mines.
【學(xué)位授予單位】：安徽理工大學(xué)
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2015
【分類號】：TD401

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