【正文】 機的微處理系統(tǒng)除了工況監(jiān)測，還可以對其采集信息進行分析處理，再輸出顯示、存儲、控制和傳輸?shù)?，以實現(xiàn) 檢測、預警、保護、健康診斷、事故查詢、維修指導和調度分析等多種功能。 山東科技大學學士學位論文 7 采煤機的分類和組成 采煤機有不同的分類方法，一般我們按照工作機構的形式進行分類，可分為：滾筒式、鉆削式和鏈式采煤機；現(xiàn)在我們所說的采煤機主要是指滾筒采煤機，這種采煤機適用范圍廣，可靠性高，效率高，所以現(xiàn)在使用很廣泛。 ⑵截割部： 截割電動機橫向布置在搖臂上單獨驅動，經搖臂減速箱三級直齒、以及行星傳動減速后，通過方形出軸與截割滾筒連接，驅動截割滾筒旋轉，實現(xiàn)割煤、落煤、裝煤。各項保護和顯示功能齊全，并配備中文液晶顯示屏，實時顯示采煤機的工況參數(shù)。 ⑺調高：主要由調高電機、調高泵、粗過濾器、手液動換向閥、集成塊閥和油箱等組成。該采煤機使用的電氣控制箱符合礦用電氣設備防爆規(guī)程的要求，可在有瓦斯或煤層爆炸危險的礦井中使用，并可在海拔不超過 2021m、周圍介質溫度不超過＋ 40℃ 或低于－ 10℃ 、不足以腐蝕和破壞絕緣的氣體與導電塵埃的情況下使用。2021 裝機功率 截割電機型號 YBC3300 牽引電機型號 YBCS440B 牽引形式 交流變頻 截割電機電壓 1140V 牽引電機電壓 380V 泵電機型號 滾筒轉速 山東科技大學學士學位論文 11 搖臂長度 截割電機功率 2300KW 牽引電機功率 2 40KW 泵電機功率 搖臂擺角 +176。 截割電動機橫向直接安裝在搖臂減速箱內，與傳統(tǒng)的縱向布置的采煤機相比，沒有固定減速箱 、搖臂回轉套、螺旋錐齒輪等結構，傳動效率高，結構簡單、緊湊。搖臂外殼上、下由冷卻水套，以降低搖臂內油池的溫度。 左、右搖臂減速箱傳動方式相同，傳動元件全部通用。而且電機工作要可靠，啟動轉矩大，過載能力強，效率高。 ⑵牽引電動機的選擇 由設計要求知，截割部功率為 40 2KW，即每個截割部功率為 40KW。 額定轉速： 1472P/m 額定頻率： 50HZ。 總傳動比 總i ＝＝＝ 滾總 nnI n —— 電動機轉速 r/min 滾n —— 滾筒轉速 r/min 傳動比的分配 在進行多級傳動系統(tǒng)總體設計時，傳動比分配是一個重要環(huán)節(jié)，能否合理分配傳動比，將直接影響到傳動系統(tǒng)的外闊尺寸、重量、結構、潤滑條件、成本及工作能力。 4．使各級傳動中的大齒輪進入油中的深度大致相等，從而使?jié)櫥容^方便。傳動時，內齒圈 b 固定不動，太陽輪 a 為主動輪，行星架 x 上的行星輪 g— 面繞自身的軸線 ox— ox 轉動，從而驅動行星架 x回轉，實現(xiàn)減速。如上圖所示，當內齒圈 b 固定，以太陽輪 a 為主動件，行星架 g 為從動件時，傳動比的推薦值為 ～ 9。 = 由于采煤機機身高度受到嚴格限制，每級傳動比一般為 。 ⑵連續(xù)傳動條件：齒輪嚙合的重合度大于 1. 齒輪材料的選擇 ⑴選擇原則 ① 滿足工作條件的要求； ② 考慮齒輪尺寸的大?。? ③ 考慮到齒輪受到重載和沖擊載荷的情況； ④ 選用高強度鋼表面要硬化處理。 min1? ) 轉矩 T/(N 在 設計過程中得到了 高峰老師的 親切 指導 。 在設計中 ，利用三維制圖軟件繪制了 采 煤機 。在進行最后的強度校核時，選取了眾多方法種的一種，主要以 建立支架力學模型 和受力分析為主 ，目前，出現(xiàn)了一些新的 方法 來研究支架的結構強度，有限元法，薄壁箱型截面組合強度的計算機輔助算法以及 采煤機強度的概率設計法 是當前計算機輔助程度 較高的方法 ，這些 新的技術和 知識 都有待于在 今后 的工作 和 學習中 進行研究 。 在 我做畢業(yè)設計的每個階段，從選題到查閱資料，論文提綱的確定， 論文 圖紙 的修改，后期論文的 調整 等各個環(huán)節(jié)中都給予了我悉心的指導。 感謝從 百忙之中抽出時間來評閱論文的各位專家、教授 ，向 各位 對我畢業(yè)設計評審和指導的 專家、教授和各位老師 表示衷心感謝！ 山東科技大學學士學位論文 34 附錄 一 英文翻譯 Switched Reluctance Motors Drive for the Electrical Traction in Shearer Abstract— The paper presented the double Switched Reluctance motors parallel drive system for the electrical traction in shearer. The system ponents, such as the Switched Reluctance motor, the main circuit of the power converter and the controller, were described. The control strategies of the closedloop rotor speed control with PI algorithm and balancing the distribution of the loads with fuzzy logic algorithm were given. The tests results were also presented. It is shown that the relative deviation of the average DC supplied current of the power converter in the Switched Reluctance motor 1 and in the Switched Reluctance motor 2 is within . Keywords switched reluctance。 electrical drive I. INTRODUCTION The underground surroundings of the coal mines are very execrable. One side, it is the moist, high dust and inflammable surroundings. On the other side, the space of roadway is limited since it is necessary to save the investment of exploiting coal mines so that it is difficult to maintain the equipments. In the modern coal mines, the automatization equipments could be used widely. The faults of the automatization equipments could affect the production and the benefit of the coal mines. The shearer is the mining equipment that coal could be cut from the coal wall. The traditional shearer was driven by the hydrostatic transmission system. The fault ratio of the hydrostatic transmission system is high since the fluid in hydrostatic transmission system could be polluted easily. The faults of the hydrostatic transmission system could affect the production and the benefit of the coal mines directly. The fault ratio of the 山東科技大學學士學位論文 35 motor drive system is lower than that of the hydrostatic transmission system, but it is difficult to cool the motor drive system in coal mines since the motor drive system should be installed within the flameproof enclosure for safety protection. The motor drive system is also one of the pivotal parts in the automatization equipments. The development of the novel types of the motor drive system had been attached importance to by the coal mines. The Switched Reluctance motor drive could bee the main equipments for adjustable speed electrical drive system in coal mines [1], because it has the high operational reliability and the fault tolerant ability [2]. The Switched Reluctance motor drive made up of the doublesalient pole Switched Reluctance motor, the unipolar power converter and the controller is firm in the motor and in the power converter. There is no brush structure in the motor and no fault of ambipolar power converter in the power converter [3][4]. The Switched Reluctance motor drive could be operated at the condition of lacked phases fault depended on the independence of each phase in the motor and the power converter [5]. There is no winding in the rotor so that there is no copper loss in the loss and there is only little iron loss in the rotor. It is easy to cool the motor since it is not necessary to cool the rotor. The shearer driven by the Switched Reluctance motor drive had been developed. The paper presented the developed prototype. II. SYSTEM COMPONENTS The developed Switched Reluctance motors drive for the electrical traction in shearer is a type of the double Switched Reluctance motors parallel drive system. The system is made up of two Switched Reluctance motors, a control box installed the power converter and the controller. The adopted two Switched 山東科技大學學士學位論文 36 Reluctance motors are all threephase 12/8 structure Switched Reluctance motor, which were shown in Figure 1. Figure 1. Photograph of the two threephase 12/8 structure Switched R