發(fā)布時(shí)間：2018-03-22 08:30

  本文選題：多級(jí)帶式輸送機(jī)　切入點(diǎn)：速度控制　出處：《太原理工大學(xué)》2017年碩士論文　論文類(lèi)型：學(xué)位論文

【摘要】：作為一種散狀物料的運(yùn)輸設(shè)備,帶式輸送機(jī)具有運(yùn)行效率高、輸送物料多、運(yùn)輸距離長(zhǎng)、維護(hù)成本低等優(yōu)點(diǎn)而被廣泛應(yīng)用在礦井、碼頭和石油等領(lǐng)域。在煤炭的運(yùn)輸過(guò)程中,帶式輸送機(jī)的運(yùn)行功耗普遍偏高,主要有兩個(gè)方面的原因,一方面,帶式輸送機(jī)以高速運(yùn)行,而輸送帶上的煤量一般達(dá)不到原先設(shè)計(jì)的標(biāo)準(zhǔn)值,有時(shí)甚至空載運(yùn)行;另一方面,多級(jí)帶式輸送機(jī)普遍采用逆煤流啟動(dòng)方式,在各級(jí)帶式輸送機(jī)依次啟動(dòng)完畢且穩(wěn)定運(yùn)行后,才給輸送帶上煤。這兩個(gè)方面都極大地增加了帶式輸送機(jī)的輕載或空載運(yùn)行時(shí)間,造成了不必要的機(jī)械磨損,浪費(fèi)了大量的電能。因此,礦井順煤流輸送系統(tǒng)節(jié)能優(yōu)化控制技術(shù)的研究勢(shì)在必行。為了達(dá)到煤流輸送系統(tǒng)的節(jié)能要求,本文從三個(gè)方面進(jìn)行了研究,其一,通過(guò)帶速與運(yùn)量的優(yōu)化匹配,提出了帶式輸送機(jī)速度控制的節(jié)能技術(shù),實(shí)現(xiàn)了“煤多快拉,煤少慢拉”的目標(biāo);其二,基于速度控制,依次計(jì)算各級(jí)帶式輸送機(jī)的啟動(dòng)延時(shí)時(shí)間,提出了順煤流啟動(dòng)節(jié)能技術(shù),縮短了帶式輸送機(jī)的空載運(yùn)行時(shí)間;其三,綜合前兩種節(jié)能技術(shù),進(jìn)行了帶式輸送機(jī)瞬間加速時(shí)間控制的節(jié)能優(yōu)化實(shí)驗(yàn)。根據(jù)適當(dāng)降低帶速可以使輸送帶上物料橫截面積達(dá)到最大的前提,提出了帶式輸送機(jī)速度控制的節(jié)能技術(shù)。并分析了節(jié)能技術(shù)的原理、煤礦帶式輸送機(jī)的落料形式;鑒于煤炭生產(chǎn)的間斷性,驅(qū)動(dòng)帶式輸送機(jī)的電機(jī)經(jīng)常以非最佳工況點(diǎn)運(yùn)行,且?guī)捷斔蜋C(jī)的速度不能進(jìn)行頻繁地調(diào)節(jié),建立了帶速與運(yùn)量的階梯匹配模型;在帶式輸送機(jī)瞬間加速過(guò)程中,設(shè)置了合理的速度和加速度曲線(xiàn),得到了最小加速時(shí)間的計(jì)算方法。在研究已有的多級(jí)帶式輸送機(jī)順煤流啟動(dòng)方法的基礎(chǔ)上,提出了基于速度控制的順煤流啟動(dòng)節(jié)能技術(shù)。通過(guò)比較各種速度和加速度曲線(xiàn),設(shè)計(jì)了“S”形軟啟動(dòng)速度曲線(xiàn)表達(dá)式;為了更好地實(shí)現(xiàn)多級(jí)帶式輸送機(jī)的順煤流啟動(dòng)過(guò)程,采取了相應(yīng)的過(guò)程故障保護(hù)措施;結(jié)合實(shí)際煤炭運(yùn)輸現(xiàn)場(chǎng)的數(shù)據(jù),對(duì)基于速度控制的順煤流啟動(dòng)節(jié)能技術(shù)進(jìn)行了仿真分析,即建立了具體的帶速與運(yùn)量階梯匹配模型,求解了瞬間加速過(guò)程中的加速度及最小加速時(shí)間,模擬了四級(jí)帶式輸送機(jī)的順煤流啟動(dòng)及相應(yīng)的加速過(guò)程,從功率消耗和空載運(yùn)行時(shí)間兩個(gè)方面,進(jìn)行了節(jié)能計(jì)算分析,結(jié)果表明,節(jié)能效率為6.2%,一天節(jié)省的空載運(yùn)行時(shí)間為0.97h。鑒于帶式輸送機(jī)速度控制的節(jié)能技術(shù)和基于速度控制的順煤流啟動(dòng)節(jié)能技術(shù),都涉及帶式輸送機(jī)在短時(shí)間內(nèi)的加速過(guò)程,因此,本文設(shè)計(jì)了帶式輸送機(jī)瞬間加速時(shí)間控制的節(jié)能優(yōu)化實(shí)驗(yàn),包括硬件的選型、電氣原理圖的設(shè)計(jì)、硬件設(shè)備的安裝、PLC程序的編寫(xiě)和觸摸屏畫(huà)面的繪制。在進(jìn)行帶式輸送機(jī)速度的檢測(cè)與控制實(shí)驗(yàn)的基礎(chǔ)上,開(kāi)展了瞬間加速時(shí)間控制的節(jié)能優(yōu)化實(shí)驗(yàn),通過(guò)實(shí)驗(yàn)測(cè)試及節(jié)能分析,結(jié)果表明,按照在瞬間加速過(guò)程中設(shè)置的加速度,計(jì)算得到的最小加速時(shí)間符合實(shí)驗(yàn)要求,且有利于節(jié)能降耗和減少不必要的機(jī)械損耗。
[Abstract]:As a bulk material transport equipment, high operation efficiency of belt conveyor, conveying material, long distance transport, low maintenance costs and is widely used in mines, docks and oil fields. In the process of coal transportation in the operation of power consumption of the belt conveyor is generally high, the main reason. Two aspects on the one hand, the belt conveyor running at high speed, and the amount of coal conveying belt of the original design is generally not up to the standard value, sometimes even no-load operation; on the other hand, commonly used flow start-up mode inverse multistage belt conveyor of coal belt conveyor, in order to start finished and stable operation at all levels later, to the coal belt. These two aspects have greatly increased the belt conveyor of light load or no-load running time, causing unnecessary mechanical wear, waste a lot of power. Therefore, the mine coal seam section flow conveying system Can it is imperative to research on optimal control technology. In order to achieve the requirements of energy-saving coal conveying system, is studied in this paper, from three aspects, through the optimization of belt speed and volume, with energy saving technology of conveyor speed control is proposed to achieve the "coal fast, less coal slow pull" target; second, based on speed control, are calculated at all levels of the belt conveyor start delay time, put forward the coal flow smoothly starting energy-saving technology, shorten the idle running time of belt conveyor; third, the former two kinds of comprehensive energy saving technology, the energy-saving optimization of experimental instantaneous acceleration time control of belt conveyor. According to the appropriate reduction the conveyor belt speed can reach the maximum cross sectional area of material premise, with energy-saving technology conveyor speed control is put forward. And analyzed the principle of energy saving technology, material forms of belt conveyor in coal mine; In view of the discontinuity of coal production, motor driving belt conveyor often run in non optimal operating point, and the speed of the belt conveyor can not be adjusted frequently, a ladder belt speed and volume matching model; in an instant acceleration process of belt conveyor, set the velocity and acceleration curves obtained reasonable. The minimum acceleration time calculation method. In the multi belt conveyor of the existing basis starting method of coal flow, the speed control of coal flow smoothly start based on energy saving technology. By comparing the curve of velocity and acceleration, the design of "S" shaped soft start speed curve expression; in order to realize the multi band type the conveyor along the coal flow starting process, take corresponding measures to protect the process of failure; combined with the actual data of coal transportation field, the speed control of coal flow smoothly start energy saving technology based on Simulation analysis is carried out, namely the establishment of a specific belt speed and volume ladder matching model, solving the instantaneous acceleration in the process of acceleration and the minimum acceleration time, coal flow smoothly and the corresponding start acceleration process of four belt conveyor were simulated from the power consumption and the no-load running between the two aspects were calculated the analysis results show that, energy saving, energy saving efficiency is 6.2%, the idle running time of saving the day for 0.97h. in view of energy saving technology with conveyor speed control and speed control of coal flow smoothly starting energy-saving technology based on related acceleration process of belt conveyor in a short period of time. Therefore, this paper designed experimental instantaneous acceleration energy optimization time control of belt conveyor, including hardware selection, design of electrical principle diagram, hardware installation, drawing program PLC and touch screen in belt conveyor speed. Based on the experiment of detection and control, energy saving optimization experiments carried out instantaneous acceleration time control, through analysis, experimental test and energy saving results show that according to the set in the moment to accelerate the process of acceleration, the minimum acceleration time is calculated in accordance with the experimental requirements, and is conducive to saving energy and reducing mechanical loss is not necessary.

【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(lèi)號(hào)】：TD634.1

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本文編號(hào)：1647911