【正文】 t hesitate to resign from a fivestar hotel to work in the new restaurant with just five chefs, eager to explore the excitement of a life that had yet to unfold. Since that Shanghai launch, Blue Frog has opened 24 branches in seven cities across China, including Beijing, Tianjin, Chongqing and Nanjing in Jiangsu province. The new menu for this fall, which was launched in early September, showcases how flavors of East and West meet to create a variety of delicious burgers and other entrees in the cozy, softlit restaurants. I liked the mapo burger best. Just imagine the flavorful bination of the hot, mildly numbspicy mapo tofu sauce and grilled 100percent Australian beef patty, along with a slice of cheddar cheese and a side of french fries. The savory sauce helped highlight the patty39。s team of more than 550 chefs. Many of the franchise39。s ancient tradition. ... It is not about exercise but to discover the sense of oneness with yourself, the world and nature.Zarthoshtimanesh, who runs his own yoga center, Iyengar Yogabhyasa, in the Indian financial capital of Mumbai, says: Chinese students are very respectful. For me, all students are the same no matter what their race is and where they e from. The most important thing is to remove mental walls. Zarthoshtimanesh learned yoga from the late Yogacharya Iyengar and traveled with the master to different countries. Consulate General of India in southern China39。s Pink Revolution, an annual campaign that seeks to raise awareness and funds for breast cancer research, the hotel recently announced. A major sponsor of the campaign for three years in a row, Conrad Macao has pledged to donate a portion of its proceeds to the fund, includ ing those collected from selling its popular bear and rubber duck merchandise, in limited pink editions. Pink is the theme for floral arrangements and decorations in the hotel in October. In addition, on Fridays that month, members of the management and staff will add something pink to their uniforms, regular s and handwritten guest cards. Breast cancer is the most prevalent type of cancer among women in Hong Kong and is also of significant concern in Macao and around the world, regardless of age, general manager Bede Barry said in a statement. The hotel has enlisted the support of a number of international and local celebrities to help drive the cause, including South Korean actor Jung Suk Won. This year, a lucky guest who stays at the hotel during the campaign and also donates money for the cause will win a necklace specially designed by Arte Madrid, a Spanish jewelry brand. Women should strive to balance quality of work and life, and have children at a young age. As a doctor I see much suffering because of this imbalance. Xiao Ying, 36, works for a large law firm. Her job means lots of travel, a heavy caseload and a large number of meetings, so her schedule is hectic. She has been pregnant twice, but had abortions on both occasions because she felt her busy, highpressure career wasn39。s smoggy days. If the smog is severe, I39。s annual National Day for Eye Care, the China Youth Development ServiceCenter and Zhejiang Medicine, a leading listed Chinese pharmaceutical pany, jointlyannounced the kickoff of the about one month, a questionnaire piled by top eye care medical experts in China willbe distributed through multiple online partners, including , as well asthrough offline survey events held in universities, middle schools and primary schools acrossthe report will be released based on the survey statistics and analysis, and most importantly,guidelines for parents and youth on how to care for the eyes and prevent myopia — agrowing problem in China39。因此當玉米脫粒機進行脫粒時，受到 2496N的切向力。當脫粒機較大時選取較高值，脫粒機較小時選取較小值。 因此脫粒滾筒外緣即板尺頂部的線速度不得大于 4m/s。玉米籽粒從高處落下撞擊地面相當于高速與板尺接觸。滾筒轉(zhuǎn)速是由滾筒上安裝著的板齒的頂部的線速度所決定的。因為在脫粒機工作時板齒與玉米果穗頻繁接觸，需要保證板齒 硬度 、強度、疲勞強度、耐磨性以及韌性等，故將平板齒以及帶冠板齒的頂部進行淬火處理。 板齒樣式及尺寸 本設計板齒分為兩種，分別為帶冠板齒以及平板齒。并根據(jù)板齒式玉米脫粒機的工作過程以及工作原理分析此類玉米脫粒機在脫凈率以及破碎率等方面的優(yōu)點。從而達到擠搓玉米果穗使其脫下籽粒的效果。為了模仿人工用竹簽先擠第 2 章 板齒玉米脫粒機總體結(jié)構(gòu)與工作原理 9 掉玉米果穗上的局部籽粒這一動作，前一部分的板齒被設計成帶冠板齒。 1 機架 2 出料口 3 排芯口 4 出料口壓板 5 柵格凹板 6 入料口 7 帶輪 8 電機 圖 21 板齒玉米脫粒機基本結(jié)構(gòu) 板齒脫粒機工作原理 擠搓式板齒玉米脫粒機充分應用了仿生技術(shù) [44]，脫粒區(qū)的板齒對玉米果穗的運動模仿了人工用手搓玉米。在脫粒區(qū)內(nèi)玉米果穗與果穗之間以及玉米果穗與凹板間相互擠搓，致使籽粒脫落。玉米果穗由入料口進入脫粒機，V 帶輪將電機的功率傳 動給脫粒滾筒使其轉(zhuǎn)動。本文首先繪制二維 CAD草圖，建立 PRO/E 三維模型。擠搓原理脫粒機全面克服了釘齒式玉米脫粒機的缺點，不僅脫凈率高而且破碎率低，它的損失率比打擊式玉米脫粒機至少下降了 %[27]，適合種子玉米以及普通玉米的脫粒。 本文主要研究內(nèi)容 我國市面上用的最多的脫粒機為釘齒滾筒式脫粒機。 雖然玉米脫粒機的研究已經(jīng)取得了許多成果，但是仍舊存在一些不足。在我國種子公司一般將玉米果穗在場上晾干，降低其水分到 18%左右，然后運用烘干塔對籽粒進行烘干，最終使玉米籽粒的水分可以降至 13%[40]。 存在的問題 我國對于玉米的加工方式流程和外國存在一些差異。 張飛等學者 [36]于 2022 年發(fā)明了一種籽粒破稅率低，脫凈率高的脫粒機，這種脫粒機是一種軟脫式玉米脫粒機，它的外部由橡皮套組成。 吉林大學學士學位畢業(yè)論文 6 衣淑娟等學者 [33]于 2022 年發(fā)明了一臺軸流式玉米脫粒裝置，研究了稻谷脫出物在裝置內(nèi)的分布規(guī)律，得到了稻谷脫出物沿著軸向分布的曲線方程。李耀明等學者 [29]研究了軸流式玉米脫粒裝置內(nèi)玉米芯以及籽粒在軸向的分布曲線 。 陳 樹人等學者 [25]于 1999 年分析研究了聯(lián)合收割機，應用計算機仿真技術(shù)對摘脫滾桶梳刷作物的動作以及割臺上板尺的運動進行了研究。 國內(nèi)玉米脫粒機的發(fā)展 雖然對于脫粒機的研究在國內(nèi)較晚起步，但是其發(fā)展速度十分快。 第 1 章 緒論 5 Henrich 等學者 [18]于 1999 年，實驗分析了谷物脫粒過程，研究分析了分離率與谷物含水率之間的關(guān)系。 Huynh 等學者 [14]于 1979 年，研究并建立出凹板分離過程與脫落谷粒的數(shù)學模型。 Zorer 和 Hall[11]于 1960 年，對玉米籽粒的溫度、含水率、加載位置以及加載速度等因素 對玉米籽粒所受的擠壓強度的影響做了分析研究。因此本文設計擠搓原理的板齒式玉米脫粒機。 綜合比較各類玉米脫粒機 釘齒打擊原理的玉米脫粒機雖然脫粒效率高，但是對籽粒損傷大，影響玉米收獲質(zhì)量。 圖 14 差 速原理玉米脫粒機 （ 5）除了上面的這些常用的脫粒原理外，還有并列籽粒成對脫粒法。在脫粒區(qū)里，直滾筒與螺旋滾筒差速旋轉(zhuǎn)組成脫粒部件。擠搓式玉米脫粒機運用了仿生技術(shù)，模仿人工用手擠搓玉米時的動作，極大的降低了玉米籽粒的破損率 。這種碾壓式玉米脫粒機的脫粒效率較低，并且當喂入量過大時，容易堵塞滾筒造成籽粒擦傷。打擊式玉米脫粒機雖然脫凈率與效率高但是對玉米籽粒的傷害較大。 5 T Y — XX — XX ① ② ③ ④ ⑤ ① 5 代表脫粒機械產(chǎn)品代號 ② T 代表脫粒機第一個字“脫”的第一個拼音字母 ③ Y 代表玉米第一個字“玉”的第一個拼音字母 吉林大學學士學位畢業(yè)論文 2 ④ 滾筒的工作長度，單位為厘米 ⑤ 滾筒的最大工作直徑，單位為厘米 各類玉米脫粒機的工作原理 （ 1） 打擊脫粒原理 ：通過釘齒或者紋桿打擊玉米果穗，以及玉米果穗相互撞擊后，破壞玉米籽粒與其穗軸之間的連接使其脫落。運用玉米脫粒裝置進行脫粒時產(chǎn)生的壓縮、沖擊和剪切等作用都會損傷玉米籽粒 [7]，玉米脫粒質(zhì)量嚴重的影響著玉米產(chǎn)量。 我國國土面積大，自然資源豐富，各農(nóng)作物的產(chǎn)量皆位于世界前列，但大部分地方玉米脫粒仍然采用的是較落后的技術(shù)。玉米種植面積增長十分迅猛，全球種植面積已超過 億公頃