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31中還可看出,四種不同規(guī)格破碎機,破碎腔所對應的圓弧長度都不同,即轉子對應的角度 不同,其中以 大,所對應的圓弧長度較長為 好。 根據理論力學碰撞原理,物料以正碰撞(垂直碰撞 ) 效果最佳。 本次設計如圖 35所示,該機有三段折線反擊板,其排料口較小、 ? 角也較小所以反擊板與漸開線離得較近。物料被拋射的方向與第三段反擊板正碰撞。從 A點板錘轉過約 25176。便可確定第二段反擊板位置。折線反擊板結構簡單,制造容易。由此可知,對于這種破碎機不能無謂地追求追求 0?? 176。這樣所有參數已基本確定,進而進一步完善反擊式破碎機破碎腔的設計。其間隙大小可通過懸掛螺栓進行調整。 3) 液壓式。彈簧預緊力的大小可以通過反擊裝置工作時的平衡條件來計算。 取 ml ? , me ? 帶入式中: NelFW cx 1 8 0 91 6 ,03/ ????? 河南工業(yè)職業(yè)技術學院畢業(yè)論文 18 結 語 反擊式破碎機簡稱反擊破,因結構簡單,電耗省,破碎比大,產品粒 度均勻等優(yōu)點,在冶金、焦化、化工、建筑材料、耐火材料等工業(yè)部門得到廣泛應用, 反擊式破碎機利用高速旋轉的轉子上的板錘,對送入破碎腔內的物料產生高速沖擊而破碎,且使已破碎的物料沿切線方向以高速拋向破碎腔另一端的反擊板,再次被破碎,然后又從反擊板反彈到板錘,繼續(xù)重復上述過程。 本次設計從轉子等幾個主要重點機構的結構設計著手,分析了破碎機的 運行原理。因此,雖然我們的仿真試驗表明了算法 對解決該類問題具有良好的效果,但將其應用到實際生產時,可能會碰到更多的實際問題,例如破碎的粒度,實際破碎過程中破碎效率等,這些都是影響破碎機性能的重要因素。 由于本人能力有限,以及時間 上的倉促,設計中難免有考慮不周與設計不正確的地方,希望各位老師能夠給予諒解,并提出寶貴意見。對張平的感激之情是無法用言語表達的。 我更要感謝父母的養(yǎng)育之恩,他們默默無聞的在各方面給予我最有力的支持。s Zhangye city during their journey to Kazakhstan, May 5, 2021. The caravan, consisting of more than 100 camels, three horsedrawn carriages and four support vehicles, started the trip from Jingyang county in Shaanxi on Sept 19, 2021. It will pass through Gansu province and Xinjiang Uygur autonomous region, and finally arrive in Almaty, formerly known as AlmaAta, the largest city in Kazakhstan, and Dungan in Zhambyl province. The trip will cover about 15,000 kilometers and take the caravan more than one year to plete. The caravan is expected to return to Jingyang in March 2021. Then they will e back, carrying specialty products from Kazakhstan A s mall art troupe founded six decades ago has grown into a household name in the Inner Mongolia autonomous region. In the 19 50s, Ulan Muqir Art Troupe was created by nine young musicians, who toured remote villages on horses and performed traditional Mongolian music and dances for nomadic families. The 54yearold was born in Tongliao, in eastern Inner Mongolia and joined the troupe in says there are 74 branch troupes across Inner Mongolia and actors give around 100 shows every year to local nomadic people. I can still recall the days when I toured with the troupe in the early 39。t just about sharing art with nomadic families but also about gaining inspiration for the music and dance. Ulan Muqir literally translates as red burgeon, and today39。s president, who is also a renowned tenor, tells China Daily. During a tour in 1985, he went to a village and met an elderly local man, who told him a story about his friendship with a solider from Shenyang, capital of Northeast China39。s to e and recapping the key points. This device, not used in the original, is culturally understandable but artistically mediocre. What puzzles me is the two new songs for the opening and end credits. They were written in English, but sung by Chinese with an unfortable accent. They were obviously designed to a。s cultural foray overseas , has been widely panned by its home audience. Retitled Empresses in the Palace, the American version has been shortened from its original 76 episodes at 45 minutes each, to six 90minute episodes. The quick pacing threw off many native viewers, who are accustomed to a more leisurely daytimesoapstyle narrative rhythm. (Chinese TV stations would run two or three episodes every day.) I did not finish the fulllength version and found the truncated one not difficult to follow. What39。s villages and entertain nomadic families, but their fame has s pread around the world. On May 16 and 17, nearly 100 singers and dancers from the troupe performed at Beijing39。t help but sing the folk songs, Nasun says. The vastness of Inner Mongolia and the lack of entertainment options for people living there, made their lives lonely. The nomadic people were very excited about our visits, Nasun recalls. We didn39。謝謝你們! 河南工業(yè)職業(yè)技術學院畢業(yè)論文 21 您好,為你提供優(yōu)秀的畢業(yè)論文參考資料,請您刪除以下內容, O(∩ _∩ )O 謝謝?。?! A large group of tea merchants on camels and horses from Northwest China39。 在我的畢業(yè)論文即將完成之際,我的大學生活也接近尾聲,要說的是,幾年來我的大學同學不論在學習上還是生活上都給了我極大的幫助。 Processing Equipment,.2021. 河南工業(yè)職業(yè)技術學院畢業(yè)論文 20 致 謝 本課題在選題及研究過程中得到張平老師的悉心指導,在這段緊張忙碌的日子里,張平多次詢問研究過程,并為我指點迷津,幫助我開拓研究思路,精心點撥,熱忱鼓勵。 本次設計,囊括了大學五年所學知識的方方面面,是我在以后的學習工作之前,對各個學科課程的一次深入的綜合性的練習,鍛煉了自己發(fā)現問題、分析問題、解決問題的能力,并為以后的工作學習打下良好的堅實的基礎。 詳細重點設計了破碎腔的結構設計,首先列出了破碎腔一些重要參數,并計算出破碎機的生產率并確定了尺寸及電機的選取,最終設計出了滿足條件,制造工藝簡單、安裝方便的破碎機構,并繪制了破碎機的零件圖和裝配圖。由于物料受到板錘的打擊、與反擊板的沖擊以及物料相互之間的碰撞,物料不斷產生裂縫,松散而致粉碎。 撞擊在反擊板上的物料塊質量,可取平均值 m=,礦塊半徑取 R=,轉子圓周速度 v=35m/s, K= 計算可知 ?????? vRt s Nt kmvFC )()1( 322 ?? ??????? 整個反擊板上承受的沖擊力,整個反擊板上承受的沖擊力,可按式( 319)計算 : t kmvjKFcx )1( 23 ?? ? (319) 式中 3K ── 給料粒度不均勻性和料塊破碎后不規(guī)則形狀與假設呈球形間的差異的修正系數,其值為 ~; ? ── 不均勻系數, ~?? j ── 撞擊在反擊板長度方向上的質量為 m 的料塊數; 河南工業(yè)職業(yè)技術學院畢業(yè)論文 17 其他符號同前。一般用于大型反擊式破碎機,與液壓啟閉機殼油缸共同使用一個油壓系統(tǒng)。反擊板在工作時的位置是通過彈簧的預壓力保持的,當非破碎物進入破碎 腔內時,可克服彈簧預壓力后,從破碎腔排出。這種裝置有三種形式: 河南工業(yè)職業(yè)技術學院畢業(yè)論文 16 1) 拉桿自重式。 在本次產品設計中 θ2=75176。狀態(tài),而是 0?? 176。 河南工業(yè)職業(yè)技術學院畢業(yè)論文 15 圖 35 反擊板結構圖 在條件允許的情況下,對中細碎破碎機 2? 值宜取較大值。以及考慮第一級反擊板最小排料口尺寸 De ? 和 1? =15176。中和一上分析不難找到折線反擊板的設計方法;對于本次設計的具有兩端反擊板的,根據0?? 176。當板錘大約轉過 20176。因為漸開線的特點是,在反擊板各 點上物料都是以垂直方向沖擊,即入射角 0?? ,因此可獲得最佳的破碎效果。反擊板的形狀和結構對其破碎效果影響很大。到 73176。 對于第二級反擊板來說,應盡可能靠后,而且下端排料口接近轉子水平中心線,就是說 2? 等于 60176。這是因為第二級反擊板排料口都偏向轉子水平中心線,故 1? 等于 15176。它是建立在以下觀點基礎上,即物料與反擊板的表面應該是垂直沖撞,這樣的破碎效果好,襯板磨損又少,若δ =0176。此外, ? 角小還可以增加破碎腔圓弧長度。到 50176。如瑞典山特維克 P型反擊式破碎機其 ? 角為 35176。之間,這完全符合實際情況。 、排料口及給料導板傾角 ? 給料口寬度 mmDB ?? ;排料口尺寸: mmDe in1 ?? ;mmDe in2 ?? 。 反擊式破碎機破碎腔設計 反擊式破碎機破碎腔對生產率、 能耗、產品粒度和粒形以及襯板磨損有很大影響。 ? ? mMd bd 33 1 ????? ?? 實際 d=1m,故滿足彎扭強度要求。 河南工業(yè)職業(yè)技術學院畢業(yè)論文 10 作用在轉子軸上的力有:轉子重力 F轉子外端的圓周力 F2和板錘的不平衡力 F3,其合力 F(N)為: 0321 )( KFFFF ??? ( 38) 其中