本文選題：深井提升 + 垂懸鋼絲繩�。� 參考：《太原理工大學(xué)》2017年碩士論文

【摘要】：多繩摩擦提升機(jī)在豎井中應(yīng)用廣泛,既負(fù)責(zé)設(shè)備、人員等的下放,又負(fù)責(zé)煤礦以及矸石等的提升。垂懸在井筒中的提升鋼絲繩經(jīng)過一定時(shí)間使用后,根據(jù)煤礦安全規(guī)程要進(jìn)行更換。在更換、回收鋼絲繩時(shí),尤其深井井下回收,存在一定的安全問題:提升鋼絲繩內(nèi)部積聚有一定的扭矩,內(nèi)部扭矩釋放時(shí),快速扭轉(zhuǎn)的鋼絲繩容易互相纏繞,更甚者竄動(dòng)的繩端打傷作業(yè)人員;依靠人力拉拽回收鋼絲繩,效率低,勞動(dòng)力成本投入大。針對(duì)井下回收垂懸鋼絲繩存在的問題,本課題在研究垂懸鋼絲繩扭轉(zhuǎn)特性的基礎(chǔ)上,開發(fā)設(shè)計(jì)了一種回收裝置,可以控制鋼絲繩內(nèi)部扭矩釋放,利用機(jī)械力代替人力回收鋼絲繩。本文以井下回收鋼絲繩工藝為背景,從提升鋼絲繩螺旋結(jié)構(gòu)入手,闡述垂懸鋼絲繩形成內(nèi)部扭力的原因。結(jié)合垂懸鋼絲繩靜力學(xué)方程,對(duì)積聚在內(nèi)部的扭矩和鋼絲繩的彈性變形進(jìn)行分析。以垂懸長度為650m,直徑為46.50mm的鋼絲繩為例,利用回歸公式計(jì)算積聚在鋼絲繩內(nèi)部的扭矩,約為560N·m,以及鋼絲繩下端處于平衡位置時(shí),扭轉(zhuǎn)位移約為118圈。從垂懸長度為650m的鋼絲繩上截取七個(gè)區(qū)段進(jìn)行仿真,得到區(qū)段扭轉(zhuǎn)角的最大值和穩(wěn)定值與區(qū)段距井底距離近似呈負(fù)線型比例關(guān)系。對(duì)七個(gè)區(qū)段的扭轉(zhuǎn)角利用線性插值計(jì)算得到井底鋼絲繩下端在扭轉(zhuǎn)過程中最大角位移約為209.2圈,平衡位置的角位移約118.3圈。并對(duì)井底處19m長的鋼絲繩進(jìn)行仿真,得到扭力釋放時(shí)間為240s時(shí),鋼絲繩分段的離心力可以減小到18.7N。提出了在井底鋼絲繩下端設(shè)置控制扭力釋放機(jī)構(gòu)以降低鋼絲繩扭轉(zhuǎn)速度。設(shè)計(jì)了回收裝置的驅(qū)動(dòng)機(jī)構(gòu)、夾緊機(jī)構(gòu)、排繩與扭力釋放機(jī)構(gòu)。建立回收裝置裝配模型,在滿載6.5t工況下利用RecurDyn對(duì)連續(xù)回收裝置進(jìn)行動(dòng)力學(xué)仿真,得到鋼絲繩與繩盤作用力在220N附近小幅度波動(dòng),與排繩器作用力在30N~50N之間變化,表明回收過程比較平穩(wěn)。對(duì)回收裝置機(jī)架進(jìn)行模態(tài)分析,得到機(jī)架最小固有振動(dòng)頻率為28.877Hz,高于繩盤對(duì)機(jī)架的沖擊激勵(lì)頻率2.34Hz。對(duì)機(jī)架進(jìn)行瞬態(tài)動(dòng)力學(xué)分析,得到在裝置啟動(dòng)過程中機(jī)架最大位移為1.1891mm,最大應(yīng)力為78.473MPa,遠(yuǎn)小于機(jī)架材料的屈服極限235MPa。通過上述研究證明本課題設(shè)計(jì)的連續(xù)回收裝置應(yīng)用于井下回收鋼絲繩是合理可行的。
[Abstract]:The multi-rope friction hoist is widely used in the shaft, which is responsible for the equipment, personnel, etc., as well as the coal mine and gangue.The hoisting wire rope suspended in the shaft is replaced according to the coal mine safety regulations after a certain time of use.In replacing and recovering wire rope, especially in deep well, there are certain safety problems: there is a certain amount of torque in the lifting wire rope, and when the internal torque is released, the fast twisting wire rope is easy to twine each other.What's more, the moving rope injured the operator; relying on the manpower to pull and recover the wire rope, low efficiency and high labor cost.In view of the problems existing in the downhole recovery of suspended wire rope, on the basis of studying the torsional characteristics of the vertical hanging wire rope, a recovery device is developed and designed, which can control the internal torque release of the wire rope.Use mechanical force instead of human recovery wire rope.Based on the technology of underground recovery wire rope, starting with the spiral structure of hoisting wire rope, this paper expounds the cause of forming internal torsion of vertical hanging wire rope.Based on the static equation of hanging wire rope, the internal torque and elastic deformation of wire rope are analyzed.Taking the wire rope with a vertical suspension length of 650 m and a diameter of 46.50mm as an example, the torsional moment accumulated in the wire rope is calculated by regression formula, which is about 560 nm, and the torsional displacement is about 118 circles when the lower end of the wire rope is in the balance position.Seven sections were intercepted from the wire rope with a vertical length of 650 m for simulation. The maximum and stable values of the torsion angle of the section were approximately in a negative linear proportion to the distance from the bottom hole of the section.The maximum angular displacement of the lower end of the wire rope in the bottom hole is about 209.2 cycles and the angular displacement of the equilibrium position is about 118.3 cycles by linear interpolation for the torsion angle of the seven sections.The results show that the centrifugal force of the wire rope segment can be reduced to 18.7Nwhen the torque release time is 240s.In order to reduce the torsional speed of the wire rope, a torsion releasing mechanism is set up at the bottom of the shaft.The drive mechanism, clamping mechanism, rope arrangement and torsion releasing mechanism of the recovery device are designed.The assembly model of the recovery unit was established, and the dynamic simulation of the continuous recovery device was carried out by using RecurDyn under the condition of 6.5t full load. It was obtained that the action force of the wire rope and the rope plate fluctuated slightly in the vicinity of 220N, and the force of the wire rope was changed between the 30N~50N and the rope rower.It shows that the recovery process is relatively stable.Modal analysis shows that the minimum natural vibration frequency of the frame is 28.877 Hz, which is higher than the impulse frequency of 2.34 Hz.The transient dynamic analysis shows that the maximum displacement and stress of the frame are 1.1891 mm and 78.473MPa, which are much smaller than the yield limit of the frame material (235 MPA).It is proved by the above research that the continuous recovery device designed in this paper is reasonable and feasible for underground wire rope recovery.
【學(xué)位授予單位】：太原理工大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2017
【分類號(hào)】：TD532

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