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TH250斗式提升機全套畢業設計
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- TH250斗式提升機全套 畢業設計
目 錄
1前言·································································································································1
2 本課題介紹及設計理論·································································································2
2.1 概述······························································································································2
2.2 斗式提升機的工作原理······························································································2
2.2.1斗式提升機分類·········································································································2
2.2.2斗式提升機的裝載和卸載························································································2
2.2.3常用斗提機選用及相關計算···························································································3
2.2.4斗式提升機的主要部件···························································································5
2.2.5斗式提升機的工作原理···························································································6
3. 提升機主要參數確定及主要結構設計········································································8
3.1 提升功率的確定··········································································································8
3.2 電動機選擇··················································································································9
3.3 減速機選擇··················································································································9
3.4驅動軸設計及附件的選擇···························································································9
3.4.1 軸的材料及熱處理···································································································9
3.4.2 軸的結構設計···········································································································9
3.4.3 軸的強度校核計算·································································································10
3.4.4 軸承選用·················································································································12
3.4.5鍵的設計校核·················································································································13
3.5聯軸器的選擇································································································13
3.6驅動鏈輪的結構設計···························································································15
3.7提升機主要參數的計算····························································································15
3.8頭部罩殼的選材及連接····································································································16
3.9中部區段的設計選材········································································································16
3.10料斗與環鏈的設計··························································································17
4 結論·······························································································································19
參考文獻···························································································································20
致謝···································································································································21
附錄···································································································································22
1 前言
斗式提升機廣泛用于垂直輸送各種散狀物料，國內斗提機的設計制造技術是50年代由前蘇聯引進的,直到80年代幾乎沒有大的發展。自80年代以后,隨著國家改革開放和經濟發展的需要,一些大型及重點工程項目從國外引進了一定數量的斗提機,從而促進了國內斗提機技術的發展。有關斗提機的部頒標準JB3926—85及按此標準設計的TD、TH及TB系列斗提機的相繼問世,使我國斗提機技術水平向前邁了一大步, 但由于產品設計、原材料、加工工藝和制造水平等方面的原因,使產品在實際使用中技術性能、傳遞扭矩、壽命、可靠性和噪聲等與國際先進水平相比仍存在相當大的差距。
斗式提升機按牽引形式主要分為膠帶式、圓環鏈式和板鏈式三種,因經濟條件、技術水平及使用習慣等原因,國內用戶對圓環鏈式和膠帶式斗提機需求量較大,這兩種斗提機的技術發展受到較多的關注,而且有較為明顯的發展。TH型是一種圓環鏈斗式提升機，采用混合式或重力卸料，挖取式裝料。牽引件用優質合金鋼高度圓環鏈。中部機殼分單、雙通道兩種形式為機內重錘箱恒力自動張緊。鏈輪采用可換輪緣組合式結構。使用壽命長，輪緣更換工作簡便。下部采用重力自動張緊裝置，能保持恒定的張緊力，避免打滑或脫鏈，同時料斗遇到偶然因素引起的卡殼現象時有一定的容讓性，能夠有效地保護下部軸等部件。該斗式提升機適用于輸送堆積密度小于1.5t/m3易于掏取的粉狀、粒狀、小塊狀的底磨琢性物料。如煤、水泥、碎石、砂子、化肥、糧食等。TH型斗式提升機用于各種散狀物料的垂直輸送。適用于輸送粉狀、粒狀、小塊狀物料，物料溫度在250℃以下。
2. 本課題介紹及設計理論
2.1 概述
此次設計的任務是研究TH250斗式提升機的工作原理、性能和特點，采用理論聯系實際的方法，研究影響斗式提升機效率的影響因素，進行必要的結構改進，提出結構的方案并實施設計。同時，進行相關結構參數和工藝參數的設計與計算、總體方案設計，總體裝配以及傳動、機體等部件和相關零部件設計及繪圖。主要設計方案如下：
1） 對斗式提升機的工作原理進行深入研究，根據TH250斗式提升機的工作能力和使用要求，設計出總體方案。
2） 設計出合理的提升機結構和零件的強度，保證運行的穩定性。
3） 設計出合理的驅動裝置，保證運行的高效性。。
該項目來源于江蘇海建集團， TH斗式提升機具有輸送量大，提升高度高，運行平穩可靠，操作維修簡便，壽命長等顯著特點。斗式提升機適用于輸送粉狀，粒狀和小塊狀的低磨琢性物性，物料堆積密度小于1.5t/m ,物料溫度不超過250℃，廣泛應用于水泥提升機械。
2.2 斗式提升機的工作原理
2.2.1斗式提升機分類
1）按牽引件分類：
斗式提升機的牽引構件有環鏈、板鏈和膠帶等幾種。環鏈的結構和制造比較簡單，與料斗的連接也很牢固，輸送磨琢性大的物料時，鏈條的磨損較小，但其自重較大。板鏈結構比較牢固，自重較輕，適用于提升量大的提升機，但鉸接接頭易被磨損，膠帶的結構比較簡單，但不適宜輸送磨琢性大的物料，普通膠帶物料溫度不超過60°C，鋼繩膠帶允許物料溫度達80°C，耐熱膠帶允許物料溫度達120°C，環鏈、板鏈輸送物料的溫度可達250°C。斗提機最廣泛使用的是帶式(TD)，環鏈式(TH)兩種型式。用于輸送散裝水泥時大多采用深型料斗。如TD型帶式斗提機采用離心式卸料或混合式卸料適用于堆積密度小于1．5t／m3的粉狀、粒狀物料。TH環鏈斗提機采用混合式或重力式卸料用于輸送堆和密度小于1．5t／m3的粉狀、粒狀物料。
2）按卸載方式分類：
斗式提升機可分為：離心式卸料、重力式卸料和混合式卸料等三種形式。離心式卸料的斗速較快，適用于輸送粉狀、粒狀、小塊狀等磨琢性小的物料；重力式卸料的斗速較慢，適用于輸送塊狀的，比重較大的，磨琢性大的物料，如石灰石、熟料等。
2.2.2斗式提升機的裝載和卸載
斗式提升機的裝載方式有三種，即注入式裝載（見圖2-1）、挖取式裝載（見圖2-2）和混合式裝載。注入式裝載要求散料以微小建度均勻地落入料斗中，形成比較穩定的料流，裝料口下部應有一定的高度，采用該方式裝載時一般料斗布置較密；料斗在牽引件上布置較稀時多采用挖取式裝載，只能用于輸送粉狀或小顆粒流動性良好物料的場合，斗速運行速度在2m／s以下，介于兩者之間采用混合式裝載。
卸載方式有離心式、重力式及混合式三種。
離心式卸料料斗的運行速度較高，通常取為1—2m/s。如欲保持這種卸載必須正確選擇驅動輪的轉速和直徑，以及卸料口的位置。其優點是：在一定的料斗速度下驅動輪尺寸為最�。恍读衔恢幂^高，各料斗之間的距離可以減小，并可提高卸料管高度，當卸料高度一定時，提升機的高度就可減��；缺點是：料斗的填充系數較小，對所提升的物料有一定的要求，只適用于流動性好的粉狀、粒狀、小塊狀物料。
重力式卸載使用于卸載塊狀、半磨琢性或磨琢性大的物料，料斗運行速度為0.4—0.8m/s左右，需配用帶導向槽的料斗。其優點是：料斗裝填良好，料斗尺寸與極距的大小無關。因此允許在較大的料斗運行速度之下應用大容積的料斗；主要缺點是：物料拋出位置較低，故必須增加提升機機頭的高度。
物料在料斗的內壁之間被拋卸出去，這種卸載方式稱為離心—重力式卸載。常用于卸載流動性不良的粉狀物料及含水分物料。料斗的運動速度為0.6—0.8m/s范圍，常用鏈條做牽引構件。 ...
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