【正文】 s Day. More and more young Chinese people begin to celebrate this day in a very similar way as that in western countries. Fewer people than ever will gaze at the heavens on Saturday to pick out the two stars shining bright on either side of the Milky Way, that is, if people even know on which day Qixi falls. There are ready reminders dotted about, in the form of big ads saying Sales on Chinese Valentine39。 Festival. In this day, girls will throw a sewing needle into a bowl full of water on the night of Qixi as a test of embroidery skills. If the needle floats on top of the water instead of sinking, it proves the girl is a skilled embroiders. Single women also pray for finding a good husband in the future. And the newly married women pray to bee pregnant quickly. Tradition transformed The love story of Niulang and Zhinu, and the Qixi Festival have been handed down for generations. Yet these ancient traditions and customs are slowly dying out. Many modern Chinese, particularly youngsters, seem to know more about St Valentine39。s time for the wild fruits to ripe. The picturesque Arxan in Autumn is indeed a fairyland only exists in a dream that satisfies all your fantasies. If it rains heavily on Saturday night, some elderly Chinese will say it is because Zhinu, or the Weaving Maid, is crying on the day she met her husband Niulang, or the Cowherd, on the Milky Way. Most Chinese remember being told this romantic tragedy when they were children on Qixi, or the Seventh Night Festival, which falls on the seventh day of the seventh lunar month, which is usually in early August. This year it falls on Saturday, August 2. Folklore Story As the story goes, once there was a cowherd, Niulang, who lived with his elder brother and sisterinlaw. But she disliked and abused him, and the boy was forced to leave home with 24 only an old cow for pany. The cow, however, was a former god who had violated imperial rules and was sent to earth in bovine form. One day the cow led Niulang to a lake where fairies took a bath on earth. Among them was Zhinu, the most beautiful fairy and a skilled seamstress. The two fell in love at first sight and were soon married. They had a son and daughter and their happy life was held up as an example for hundreds of years in China. Yet in the eyes of the Jade Emperor, the Supreme Deity in Taoism, marriage between a mortal and fairy was strictly forbidden. He ordered the heaven troop to catch Zhinu back. Niulang grew desperate when he discovered Zhinu had been taken back to heaven. Driven by Niulang39。 ll wait in the line for one hour to get a ticket, and another two hours at the site, to only see a tiny bit of the place due to the crowds. Last year, 428 million tourists traveled in China over the weeklong holiday in October. Traveling during this period is a matter that needs thorough preparation. If you are short on time to plan the uping Golden Week it may not be a bad idea to avoid some of the most crowded places for now. There is always a place so fascinating that everyone yearns for. Arxan is a place like this. The beauty of Arxan is everlasting regardless of the changing of four seasons. Bestowed by nature, its spectacular seasonal landscape and mountains are just beyond word. Arxan is a crucial destination for the remended travelling route, China Inner Mongolia Arxan — Hailar — Manzhouli. It is also the joint of the four prairies across the SinoMongolian border, where people gravitate towards the exotic atmosphere mixed with Chinese, Russian, and Mongolia elements. As a historic site for the Yitian Battle, Arxan still embodies the spirit of Genghis Khan. Walking into Arxan, you will be amazed by a kaleidoscope of geous colors all the year round the Spring azaleas blooming red in the snow, the Summer sea wavering blue in the breeze, the Autumn leaves painted in yellow covering volcanic traces, and the Winter woods shining white on the vast alpine snowscape. Hinggan League Arxan city is situated in the far eastern area of Inner Mongolia Autonomous Region. Its full name Haren Arxan means hot holy water in the Mongolian language. Arxan is a tourism city in the northern frontier with a blend of large forest, grand prairies, vast snowfield, heaven lake cluster, thermium, as well as volcanic cluster. It is a rare and unique ecotourism base filled with healthy sunshine, clean air and unspoiled green. Nestled close to the country39。最后我要感謝我的母校 —— 湖南農(nóng)業(yè) 大學(xué)，是母校給我們提供了優(yōu)良的學(xué)習(xí)環(huán)境；另外， 我還要感謝那些曾給我授過課的每一位老師，是你們教會我專業(yè)知識。 并將積極影響我今后的學(xué)習(xí)和工作。我的設(shè)計較為 簡潔 ，但是 高 老師仍然細心地糾正設(shè)計內(nèi)容中的錯誤。在這里首先要感謝我的指導(dǎo)老師 高英武教授 。 通過這次設(shè)計又學(xué)到了很多以前沒接觸到的新知識，提高了自己的自學(xué)能力。 21 圖 10 曲軸 Figure9 Crackaxis 7 結(jié)論 大致了解了機械設(shè)計的方法和程序，特別是怎么思考問題和解決問題，使得在今后的工作中遇到問題能迎刃而解。滾筒間的固定采用固定板。即為傾斜角度。 由力學(xué)知識，容易得出 tanθ 。減速簡圖（如圖 9） 20 圖 9 減速裝置簡圖 Figure9 Reduction gear diagram 利用核仁與壓碎的碎殼重力不同進行分離。 主要改進措施：為了使全過程 更趨于機械化，本人從原有基礎(chǔ)上再設(shè)計了一個振動分離裝置。 圖 8 入料斗 Figure8 Into the hopper 6 存在的問題及改進措施 由于本機入料斗偏小，故存在頻繁加料的問題，給加工帶來麻煩。 機體的下面安裝電動機，皮帶輪設(shè)置在機體外面，這樣方便調(diào)節(jié)皮帶的松緊，檢查皮帶輪的安裝是否到位。 鍵的選擇 由于小皮帶輪與電機軸的聯(lián)接傳遞和扭矩小，而鍵又長，現(xiàn)校核大皮帶輪的平鍵： 由 ,差表得： K=, 則此鍵能傳遞的扭矩： T= 故此鍵安全 附： 計算過程中所有表和公式來自《機械設(shè)計》第八版 濮良貴 紀(jì)名剛主編