【正文】
b及模數(shù) ntm 1 1 37. 10 37. 10dtb d m m? ? ? ? ? ( 56) 11c o s 3 7 .1 0 c o s 1 4 1 .5 024tnt dm m mZ ? ?? ? ? ( 57) 2 . 2 5 2 . 2 5 1 . 5 0 3 . 3 7 5/ 3 7 . 1 0 / 3 . 3 7 5 1 0 . 9 9nth m m mbh? ? ? ??? ( 58) ( 4) 計算縱向重合度 ?? 1 ??????? ??? ? Zd ( 59) ( 5) 計算載荷系數(shù) K 本科畢業(yè)設(shè)計說明書(論文) 20 已知使用系數(shù) 1?AK 根據(jù) smv /? ,7級精度,由圖查得動載荷系數(shù) ? 由表查得 2 2 32 2 31 . 1 2 0 . 1 8 ( 1 0 . 6 ) 0 . 2 3 1 01 . 1 2 0 . 1 8 ( 1 0 . 6 1 ) 1 0 . 2 3 1 0 3 7 . 1 0 1 . 4 1 7H d dKb? ??? ? ? ? ? ? ?? ? ? ? ? ? ? ? ? 由圖查得 ? ? 假定 100 /AtKF N mmb ? ,由表查得 ?? ?? FH KK 故載荷系數(shù) 1 1. 11 1. 4 1. 42 2. 21A V H HK K K K K??? ? ? ? ? ? ( 510) ( 6) 按實(shí)際的載荷系數(shù)校正所算得的分度圓直徑,由式得 3311 / 3 7 .1 0 2 .2 1 / 1 .6 4 1 .3 2ttd d K K m m? ? ? ( 511) ( 7) 計算模數(shù) nm 11c o s 4 1 . 3 2 c o s 1 4 1 . 6 724n dm m mZ ? ?? ? ? ( 512) 按齒根彎曲強(qiáng)度設(shè)計 由式 32121][c o s2 F SFdn YYZYKTm ?? ? ???? ???可得出 mn ( 513) 確定計算參數(shù) ( 1) 計算載荷系數(shù) 1 1. 11 1. 4 1. 34 2. 08A V F FK K K K K??? ? ? ? ? ? ( 514) ( 2) 根據(jù)縱向重合度 ??? ,從 圖中 查得螺旋角影響系數(shù) 本科畢業(yè)設(shè)計說明書(論文) 21 ??Y ( 3) 計算當(dāng)量齒數(shù) 11 3322 3324 2 6 .2 7c o s c o s 1 4101 1 1 0 .5 6c o s c o s 1 4VVZZZZ??? ? ?? ? ? ( 515) ( 4) 查取齒形系數(shù) 由表查得 ?FaY 2 ? ( 5) 查取應(yīng)力校正系數(shù) 由表查得 ?SaY 2 ? ( 6) 由圖查得,小齒輪的彎曲疲勞強(qiáng)度極限 MPaFE 5001 ?? 大齒輪的彎曲疲勞強(qiáng)度極限 MPaFE 3802 ?? ( 7) 由圖查得彎曲疲勞強(qiáng)度壽命系數(shù) ?FNK ?FNK ( 8) 計算彎曲疲勞許用應(yīng)力 取彎曲疲勞安全系數(shù) S= ,由式得 MP aSK FEFNF ][ 111 ???? ?? MP aSK FEFNF ][ 222 ???? ?? ( 9) 計算大小齒輪的][ FSaFaYY? 1112222 .5 9 2 1 .5 9 6 [ ] 3 0 3 .5 72 .1 7 2 1 .7 9 8 [ ] 2 3 8 .8 6Fa S aFFa S aFYYYY???????? 本科畢業(yè)設(shè)計說明書(論文) 22 大齒輪的數(shù)據(jù)大 42322 2 . 0 8 2 . 8 1 4 6 1 0 0 . 8 8 c o s 1 4 0 . 0 1 6 3 5 1 . 1 8 61 2 4 1 . 6 5nm m m? ? ? ? ?? ? ??? 對比計算結(jié)果,由齒面接觸疲勞強(qiáng)度計算的法面模數(shù) nm 大于由齒根彎曲疲勞強(qiáng)度計算的法面模數(shù),取 nm = ,已可滿足彎曲強(qiáng)度。所謂的理論指導(dǎo)實(shí)踐,實(shí)踐又是檢驗(yàn)真理的唯一標(biāo)準(zhǔn),就已經(jīng)體現(xiàn)在了設(shè)計過程中。 在此,對??以及機(jī)電工程系的各位領(lǐng)導(dǎo)和老師表示衷心感謝并致以崇高的敬意;對本次設(shè)計的指導(dǎo)老師李老師和各位給予我?guī)椭耐瑢W(xué)表示最誠摯的謝意! 本科畢業(yè)設(shè)計說明書(論文) 26 參考文獻(xiàn) [1] 機(jī)械工程手冊編輯委員會編.機(jī)械設(shè)計手冊 [M].第 3版.北京:機(jī)械工業(yè)出版社,2021 [2] 宋寶玉 .步進(jìn)送料機(jī)的設(shè)計及組裝實(shí)驗(yàn)的開發(fā) .全國機(jī)械設(shè)計教學(xué)研討會議 .2021. [3] 裘建新 .《機(jī) 械原理課程設(shè)計指導(dǎo)書》 . 高等教育出版社 .2021 年 04 月 [4] 孫恒 . 《 機(jī)械原理 》 (第 7 版) . 高等教育出版社 . 2021 年 05月 [5]《機(jī)械設(shè)計課程設(shè)計》 周元康 林昌華 張海兵 編著 重慶大學(xué)出版社 2021 年 [6] 《機(jī)械設(shè)計師袖珍手冊》 毛謙德 李振清 主編 機(jī)械工業(yè)出版社 1994 年 [7] 《實(shí)用機(jī)械設(shè)計手冊上》中國農(nóng)業(yè)機(jī)械化科學(xué)研究院編 中國農(nóng)業(yè)機(jī)械出版 1985 年 [8]《礦山運(yùn)輸機(jī)械 [M]》 于學(xué)謙 主編 中國礦業(yè)大學(xué)出版社 ,1998 年 . [9]《機(jī)械工程手冊》電機(jī)工程手冊編輯委員會編 1982 年 8月 . [10]《機(jī)械工程手冊 — 機(jī)械產(chǎn)品(二) [M].》 機(jī)械工業(yè)出版社 1982 年 8月 . [11]《現(xiàn)代機(jī)械設(shè)備設(shè)計手冊 — 非標(biāo)準(zhǔn)機(jī)械設(shè)備設(shè)計 [M]》范祖堯主編機(jī)械工業(yè)出版社 .2021 年 6月 . [12]《簡明機(jī)械設(shè)計手冊(第二版) [M].》唐金松 上??茖W(xué)技術(shù)出版社 .2021 年 6月 . [13]《 DTⅡ (A)型帶式輸送機(jī)機(jī)械設(shè)計手冊 [M]》北京起重機(jī)機(jī)械研究所、武漢豐凡科技開發(fā)有限責(zé)任公司 主編 冶金工業(yè)出版社 2021 年 8月 . [14] 《 ZJT1A96 帶式輸送機(jī)設(shè)計選用手冊 [M]》 機(jī)械工業(yè)部設(shè)計單位聯(lián)合設(shè)計組 主編 黃河水利出版社 .1998 年 10 月 . [15] 《機(jī)械化運(yùn)輸設(shè)計手冊 [M]》機(jī)械化運(yùn)輸設(shè)計手冊編委會 主編 機(jī)械工業(yè)出版社 .1997 年 5月 . [16] 《新型帶式輸送機(jī)設(shè)計手 冊 [M]》 張鉞 主編 冶金工業(yè)出版社 .2021 年 2月 . 本科畢業(yè)設(shè)計說明書(論文) 27 附 錄 一 英文資料: CONVEYOR SYSTEMS Conveyors are used when material must be moved in relatively large quantities between specific locations over affixed path. The fixed path is implemented by a track system, which may be inthefloor, abovethefloor, or overhead. Conveyors divide into two basic categories: (1) powered and (2) nonpowered. In powered conveyors, the power mechanism is contained in the fixed path, using chains, belts, rotating rolls, or other devices to propel loads along the path. Powered conveyors are monly used in automated material transport systems in manufacturing plants, warehouses, and distribution centers. In nonpowered conveyors, materials are moved either manually by human workers who push the loads along the fixed path or by gravity from one elevation to a lower elevation. Types of Conveyors A variety of conveyor equipment is mercially available. In the following paragraphs, we describe the major types of powered conveyors, anized according to the type of mechanical power provided in the fixed path. Roller and Skate Wheel Conveyors. These conveyors have rolls or wheels on which the loads ride. Loads must possess a flat bottom surface of sufficient area to span several adjacent rollers. Pallets, tote pans, or cartons serve this purpose well. The two main entries in this category are roller conveyors and skate wheel conveyors, pictured in Figure . In roller conveyors, the pathway consists of a series of tubes (rollers) that are perpendicular to the direction of travel, as in Figure (a). The rollers are 本科畢業(yè)設(shè)計說明書(論文) 28 contained in a fixed frame that elevates the pathway above floor level from several inches to several feet. Flat pallets or tote pans carrying unit loads are moved forward as the rollers rotate. Roller conveyors can either be powered or nonpowered. Powered roller conveyor are driven be belts or chains. Nonpowered roller conveyors are often driven by gravity so than the pathway has a downward slope sufficient to overe rolling friction. Roller conveyors are used in a wide variety of applications, including manufacturing, assembly, packaging, sortation and distribution. Skatewheel conveyors are similar in operation to roller conveyors. Instead of rollers, they use skate wheels rotating on shafts connected to a frame to roll pallets or tote pans or other containers along the pathway, as in Figure (b). This provides the skate wheel conveyor with a lighter weight construction than the roller conveyor. Applications of skatewheel conveyors are similar to those of roller conveyors, except that the loads must generally be lighter since the contacts between the loads and the conveyor are must more concentrated. Because of their light weight, skate wheel conveyor