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摘要
9F系列粉碎機中，9表示畜牧機械的分類代號，F指粉碎機，按其轉子直徑大小的不同可以分為：20、25、26、28、萬能、多功能等型號，本人這次設計的是9F-20型錘片式粉碎機，根據設計任務的具體要求，著重設計單機，而配套輔助系統(tǒng)只作簡單介紹。本機動力配置采用皮帶輪驅動，該機主要組成部分有：進料斗、粉碎機機體、轉子、篩桶、傳動部分、電機。粉碎機是工農業(yè)生產中應用非常廣泛的一種設備，本次設計主要吸取已有粉碎機的有點，結合谷物和莖桿的特殊要求，對粉碎機的方案、傳動系統(tǒng)和工作部件進行規(guī)范設計，最終設計出一種能使用于粉碎谷物、莖桿的小型錘片式粉碎機。
9F-20型錘片式粉碎機是一種利用高速旋轉的錘片來擊碎谷物的機器，它具有通用性廣、效率高、粉碎質量好、操作方便、動力消耗低等優(yōu)點。本文將對其進行設計討論，將著重對方案選擇及總體設計、主軸的設計、箱體的結構設計進行深刻的研究和探討。
關鍵詞：設計；粉碎機；錘片
Abstract
In 9F series pulverizer ,9 means codes of classification of animal husbandry machinery, F refers to the pulverizer, according to the rotor diameter size of the different can be divided into: 20, 25, 26, 28, universal and multifunctional model.I design this time is 9 F - 20 type, hammer type crusher according to the specific requirements of design task, design single, and form a complete set of auxiliary system only simple introduction. The machine power configuration driven by belt pulley, the aircraft main part: into the hopper, crusher body, the rotor and sieve drum, transmission parts, motors. Mill is very widely used in industrial and agricultural production is a kind of equipment, this design mainly use existing mill is a little bit, combined with the special requirements of grain and stem, the mill design, transmission system and the working parts to specification, the final design out a stem can be used for crushing grain, small hammer type crusher.
9 f - 20 hammer type pulverizer is a kind of high speed rotating hammer is used to crush grain machine, it has generality, good quality, wide, high efficiency, convenient operation, low power consumption advantages. Will discuss on the design, this paper will focus on the overall design scheme selection and structure design, the design of the main shaft, box carries on the profound study and discussion.
Keyword:design;pulverizer;hammer type
目錄
中文摘要
英文摘要
1 前言 ····························································5
1.1 設計的目的和意義··············································5
1.2 設計的基本要求················································5
2 總體方案的選擇與設計··············································6
2.1 粉碎機的構造··················································6
2.2 工作原理······················································6
3 重要部件的原型與設計··············································6
3.1 進料部分······················································6
3.2 出料部分·····················································7
3.3 粉碎部分·····················································7
3.3.1 錘片·····················································7
3.3.2 轉子·····················································8
3.3.3 篩子的選型···············································9
3.3.4 錘篩間隙的確定·······································10
3.4 傳動部分····················································10
3.5 機體部分····················································10
3.5.1 外壁····················································10
3.5.2 機架····················································10
4 主要技術參數的確定··············································10
4.1 錘片的末端線速度v···········································11
4.2 轉子工作直徑和粉碎室寬度·····································11
4.3 轉子轉速n···················································11
4.4 粉碎機生產率Q···············································12
4.5配套動力·····················································12
4.5.1 配套功率N···············································12
4.5.2 選擇電動機···············································12
5 標準件的選擇·····················································13
5.1 軸承的選擇···················································13
5.2 鍵的選擇····················································13
5.3螺栓的選擇···················································13
5.4螺母的選擇···················································14
5.5墊圈的選擇···················································14
6 帶的設計························································14
6.1 確定V帶型號和帶輪直徑······································14
6.2計算帶長·····················································14
6.3 求中心距··················································14
6.4 帶長計算····················································15
6.5 帶基準長度················································15
6.6 求帶輪包角··················································15
6.7 求帶根數z···················································15
6.8 求軸上載荷··················································15
6.9 帶輪結構····················································16
7 軸的設計························································16
7.1 軸的計算·····················································16
7.1.1 軸的轉數·················································16
7.1.2 軸的輸入功率············································16
7.1.3 軸轉矩··················································16
7.1.4 軸直徑的初步確定·········································17
7.1.5 軸的結構設計·············································17
8 主要工作零部件的強度校核·········································18
8.1 錘片的強度校核···············································18
8.1.1 錘片單片的橫斷面抗拉強度·································18
8.1.2 錘片螺孔處抗剪切強度校核·································19
8.2 軸的強度校核·················································20
8.2.1 作用在軸上的力的分析·····································20
8.2.2 軸的校核·················································20
8.3 鍵的校核 ····················································21
9 軸承的壽命計算··················································22
參考文獻··························································24
致謝······························································25