课程设计机械设计设计胶带输送机的传动装置

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1、机械设计课程设计计算书 目录一、设计任务书3二、电动机的选择计算3三、传动比的分配：4四、传动装置的运动和动力参数：5五、闭式齿轮传动设计:7（一）高速级齿轮的设计：7( 1 ) 材料的选择：7( 2 ) 按齿面接触强度确定中心距并确定有关参数和几何尺寸7( 3 ) 验算齿面接触疲劳强度9( 4 ) 验算齿根弯曲疲劳强度10( 5 ) 齿轮主要几何参数11（二）低速级齿轮的设计：12( 1 ) 材料的选择：12( 2 ) 按齿面接触强度确定中心距并确定有关参数和几何尺寸12( 3 ) 验算齿面接触疲劳强度14( 4 ) 验算齿根弯曲疲劳强度15( 5 ) 齿轮主要几何参数16六、开式齿轮的设计

2、17( 1 ) 选择材料17( 2 ) 齿根弯曲疲劳强度确定模数17( 3 ) 齿轮主要几何参数19七、轴的设计及计算及联轴器的选择20（一）初步确定轴的直径20( 1 ) 高速轴的设计20( 2 ) 中间轴的设计20( 3 ) 低速轴的设计20（二）低速轴的强度校核22( 1 ) 有关参数及支点反力.22（三）高速轴的强度校核27（四）中间轴的强度校核27八滚动轴承的选择及寿命验算28（一）初选滚动轴承的型号28（二）轴承寿命验算28( 1 ) 低速轴轴承寿命验算28( 2 ) 中间轴的轴承寿命验算29( 3 ) 高速轴的轴承寿命验算30九键联接和联轴器的选择和校核30（一）键的选择30(

3、1 ) 高速轴上键的选择30( 2 ) 中间轴上键的选择30( 3 ) 低速轴上键的选择30（二）键的校核30 ( 1 ) 齿轮处的键30( 2 ) 外伸出的键31十. 减速器的润滑，密封形式和联轴器的选择31十一.参考文献31一、设计任务书1 设计题目 ：设计胶带输送机的传动装置2 .工作条件：工作年限工作班制工作环境载荷性质生产批量102多灰尘稍有波动小批3. 技术数据题号滚筒圆周力F(N)带速 v(m/s)滚筒直径 D(mm)滚筒长度 L(mm)ZL-6140000.28500900二、电动机的选择计算1. 选择电动机系列 选用Y系列，三相异步电动机，封闭式结构，电压380伏2. 选择电

4、动机功率滚筒转动所需有效功率 根据表4.2-9确定各部分的效率: 传动滚筒效率 滚筒=0.96联轴器效率 联 =0.99 滚动轴承效率 轴承=0.98（圆锥滚子轴承）开式齿轮的传动效率 开齿=0.95（0.940.96）闭式齿轮的传动效率 闭齿=0.97（8级精度）所以，传动总效率为: 所需要电动机的功率为： 3. 确定电动机的转速 滚筒的转速为：现以同步转速为1500r/min和1000r/min两种方案进行比较，由1表4.12-1查得电动机数据，并计算出总传动比列于下表：方案号电动机型号额定功率/kw同步转速/(r/min)满载转速/（r/min）总传动比1Y132S-45.5150014

5、40134.6422Y132M-65.5100096089.762n满/n滚为使传动装置内零件尺寸适当，结构紧凑，降低成本，选用方案2。电动机为Y132M26型 ，额定功率5.5kw, 同步转速1000r/min,满载960r/min。由表4.12-2查得电动机中心高 H=132mm，外伸轴段 DE=38mm80mm。 三、传动比的分配： 1. 根据文献14.2-9 取2. 总传动比为：i3. 则减速器传动比为：4. 减速箱内高速级齿轮的传动比： 5. 减速箱内低速级齿轮的传动比： 说明：上面分配的传动比仅为初步值。四、传动装置的运动和动力参数：1.0轴： （即电动机轴） 2.轴： （减速器高

6、速轴） 3.轴： （减速器中间轴） =213.618r/min 4.轴： （减速器低速轴） 5.轴： （和开式齿轮相连的传动轴） 6.轴： （滚筒轴） 轴序号功率P(kw)转速n(r/min)转矩(Nm)传动型式传动比效率05.1696051.33联轴器1.00.995.10896050.814闭式齿轮传动4.4940.974.856213.618217.092闭式齿轮传动3.3290.974.61664.169686.980联轴器1.00.994.47864.169666.442开式齿轮传动60.954.16910.6953722.669五、闭式齿轮传动设计:（一）高速级齿轮的设计： 1.

7、材料的选择：由2表10-1选择得：小齿轮 40Cr 调质处理 齿面硬度 280HBS大齿轮 45钢 正火处理 齿面硬度 230HBS大、小齿轮硬度相差50HBS（考虑经济性）应力循环次数:由2公式（10-13）计算得：取失效概率为1%，取接触强度计算的最小安全值：SHmin=1.0 由2图10-21（d）得：,由2图10-19得：，计算许用接触应力: 2. 按齿面接触强度确定中心距并确定有关参数和几何尺寸 小轮转矩： T1=50814Nmm初定螺旋角=13,。减速传动： ;取端面压力角： 基圆螺旋角： 由4.2-10,取中心距a=115mm。 a=115mm估算模数mn=(0.0070.02)

8、a=0.84-2.4mm,取标准模数mn=2mm。 小齿轮齿数： mn=2mm大齿轮齿数： z2=uz1=91.655取z1=20，z2=92 z1=20， z2=92实际传动比 传动比误差：， 在允许范围内。 修正螺旋角： 与初选=130相近,ZHZ可不修正. 齿轮分度圆直径： 圆周速度： 由2表10-4得：取齿轮精度为8级。3. 验算齿面接触疲劳强度 按电机驱动,载荷稍有波动,由2表10-2,取KA=1.10由2图10-8，按8级精度和， 得Kv=1.03。齿宽。由2表10-4，按b/d1=46/41.071=1.120,考虑轴的刚度较大和齿轮相对轴承为非对称布置，得KH=1.10。由2表

9、10-5，得KH=1.4载荷系数 计算重合度齿顶圆直径 端面压力角 齿轮基圆直径 端面齿顶压力角 =1.636 基圆螺旋角: 计算齿面接触应力故安全。4. 验算齿根弯曲疲劳强度按Z1=20，Z2=92, 得，得YN1=1.0，YN2=1.0mn=2mm5mm,故YX1=YX2=1.0取YST=2.0，SFmin=1.4计算许用弯曲应力YFa1=2.82，YFa2=2.23YSa1=1.57，YSa2=1.78因 6. 齿轮主要几何参数 z1=20, z2=92, u=4.494, mn=2 mm, z1=21， z2=94=, = mt=mn/cos=2/cos13.1160=2.053mm,

10、 mt=2.053mm a齿宽： 取 （二）低速级齿轮的设计：1.材料的选择根据工作条件及其载荷性质选择小齿轮 40Cr 调质处理 280HBS大齿轮 45钢 正火处理 230HBS应力循环次数: 取失效概率为1%，取接触强度计算的最小安全值：SHmin=1.0 由2图10-21（d）得：,由2图10-19得：，由图5-16b，得,计算许用接触应力: 因，故取2.按齿面接触强度确定中心距并确定有关参数和几何尺寸小轮转矩： T3=686.980Nmm初定螺旋角： =13,。减速传动： ;取端面压力角：基圆螺旋角： 由式（5-39）计算中心距a由4.2-10,取中心距a=160mm。 a=160m

11、m估算模数mn=(0.0070.02)a=1.123.2mm,取标准模数mn=2.5mm。 小齿轮齿数： mn=2.5mm大齿轮齿数： z2=uz1=95.91取z1=29，z2=96 z1=29，z2=96实际传动比： 传动比误差：， 在允许范围内。 修正螺旋角： 与初选=130相近,ZHZ可不修正. 齿轮分度圆直径： 圆周速度 由2表10-4，取齿轮精度为8级.3.验算齿面接触疲劳强度 按电机驱动,载荷稍有波动,由2表10-2,取K=1.10由2图10-8，按8级精度和， 得KV=1.01齿宽 ： 。 b=64mm按b/d1=64/74.240=0.862,考虑轴的刚度较大和齿轮相对轴承为

12、非对称布置，得KH=1.07由2表10-3，得KH=1.4载荷系数：计算重合度齿顶圆直径： =79.240mm =250.76mm端面压力角 =齿轮基圆直径 69.57mm 230.285mm端面齿顶压力角 1.685 1.754由式5-39,计算齿面接触应力故安全。4.验算齿根弯曲疲劳强度按Z1=29，Z2=96, 得，得YN1=1.0，YN2=1.0mn=2.5mmTC =82.1 Nm, n=3300r/minn=960r/min所以取减速器高速轴外伸段直径为d=32mm，长度L=60mm。 d=32mm L=60mm2.中间轴的设计 现初步估算轴的最小直径。选取轴的材料为45钢，调质处

13、理据2表15-3，取A=115，于是得： 403.低速轴的设计一、低速轴外伸轴段： TC=KT=1.5686.980= 1030.47Nm根据实际工作条件，查表4.7-2拟选： TL8型弹性柱销联轴器公称转矩 1250NmTC =1030.47 Nm, n=4000r/minn=64.169r/min取减速器低速轴外伸段直径为d=48mm，长度L=84mm。 d=48mm L=84mm二、初步确定轴的最小直径现初步估算轴的最小直径。选取轴的材料为45钢，调质处理据2表15-3，取A=115，于是得：（二）低速轴的强度校核1.有关参数及支点反力（1）参数计算作用在齿轮上的圆周力 Ft=N径向力

14、Fr=N轴向力 （2）计算支点反力.铅垂面支反力 RAY=N , RBY=3865.288N b. 水平面支反力 RAz=N RBX=N 2.作弯矩图a. 垂直面弯矩MY图C点，b. c. 水平面弯矩MZ图C点右 C点左, d. 合成弯矩图C点右 C点左 3.转矩T图 4.计算弯矩Mca图 该轴单向工作，转矩产生的弯曲应力按脉动循环应力考虑，取=0.6 C点左边 =6.54105N.mmC点右边 =2.56105N.mmD 点右边 =4.12105N.mm5.核轴的强度由以上分析可见，C点弯矩值最大，而D点轴径最小，所以该轴危险断面是C点和D点所在剖面。查表8-1得查表8-3得。C点轴径 因为

15、有一个键槽，轴径加大5%：， dc=50.92572.35mm 设计该点处轴径72mm，故安全。D点轴径 因为有一个键槽， dD=43.575S其它剖面与上述剖面相比，危险性小，不予校核。从上面轴的校核可以看出，所设计的轴是满足工作要求的。（三）高速轴的强度校核高速轴强度校核与低速轴相同，采用相同的方法校核之后，验证轴的强度达到要求，可用。（四）中间轴的强度校核中间轴的强度校核也与低速轴相同，采用相同的方法校核之后，验证轴的强度达到要求，可用。八、滚动轴承的选择及寿命验算(一)轴承的选择：高速轴 滚动轴承30208 （GB/T297-94）中间轴 滚动轴承30211 （GB/T297-94）低

16、速轴 滚动轴承30212 （GB/T297-94）（二）轴承寿命验算1.低速轴轴承寿命验算（1）确定轴承的承载能力查表4.6-1，轴承30212的 C=97800N（2）计算径向支反力 R1=1738.39N R2=4294.47N （3）计算派生轴向力S： S=R/2Y 查手册，30212轴承的Y=1.5， C= 97800N ，e=0.4 （4）求轴承的轴向载荷A： 由结构知 （5）计算轴承的当量动载荷P：； 插值确定查表，查表，按传动装置查取 根据合成弯矩图d,取N（6）校核轴承寿命因为 故 按轴承2计算，查表， 满足寿命要求。2.中间轴的轴承寿命验算中间轴轴承采用与低速轴轴承相同的寿命

17、验算方法，通过验算之后，寿命够用，可选用30211型。3.高速轴的轴承寿命验算低速轴轴承采用与低速轴轴承相同的寿命验算方法，通过验算之后，寿命够用，可选用30208型。九、键联接的选择和校核（一）键的选择1.高速轴上键的选择 选择A型键 L=40 GB1096-792.中间轴上键的选择A型键 L=32 GB1096-793.低速轴上键的选择齿轮处 选择B型键 L=50 GB1096-79外伸处 选择A型键 L=63 GB1096-79(二)键的校核1.齿轮处的键：齿轮材料为45钢，载荷稍有波动，静联接，查得K=0.5h=4.5mm =66.99Nmm2因，故安全。2.外伸处的键： K=0.5h

18、=4.5mm =97.95N/mm2因，故安全。十、减速器的润滑及密封形式选择1.减速器的齿轮润滑选用中负荷工业齿轮油 GB5903-1986轴承采用稀油滑2.密封圈采用旋转轴唇型密封圈 高速轴选用 FB 035050 GB13871-92低速轴采用 FB 055072 GB13871-923.联轴器的选择：高速轴选用TL6型 低速轴采用TL8型4.油标尺 M12 材料 Q235A十一、参考文献1. 巩云鹏 孙德志 喻子建 著 机械设计课程设计东北大学出版社 2000年2. 濮良贵 纪名刚 著 机械设计 东北大学出版社 2006年3. 李树军 著机械原理东北大学出版社 2000年4. 孙志礼

19、冷兴聚 魏延刚 曾海泉 著机械设计东北大学出版社 2000年5. 教育部高等教育司主编 画法几何及机械制图高等教育出版社 1999.6年g an employment tribunal claimEmployment tribunals sort out disagreements between employers and employees.You may need to make a claim to an employment tribunal if: you dont agree with the disciplinary action your employer has taken

20、 against you your employer dismisses you and you think that you have been dismissed unfairly.For more information about dismissal and unfair dismissal, seeDismissal.You can make a claim to an employment tribunal, even if you haventappealedagainst the disciplinary action your employer has taken again

21、st you. However, if you win your case, the tribunal may reduce any compensation awarded to you as a result of your failure to appeal.Remember that in most cases you must make an application to an employment tribunal within three months of the date when the event you are complaining about happened. I

22、f your application is received after this time limit, the tribunal will not usually accept it.If you are worried about how the time limits apply to you, take advice from one of the organisations listed underFurther help.Employment tribunals are less formal than some other courts, but it is still a l

23、egal process and you will need to give evidence under an oath or affirmation.Most people find making a claim to an employment tribunal challenging. If you are thinking about making a claim to an employment tribunal, you should get help straight away from one of the organisations listed underFurther

24、help.If you are being represented by a solicitor at the tribunal, they may ask you to sign an agreement where you pay their fee out of your compensation if you win the case. This is known as adamages-based agreement. In England and Wales, your solicitor cant charge you more than 35% of your compensa

25、tion if you win the case.If you are thinking about signing up for a damages-based agreement, you should make sure youre clear about the terms of the agreement. It might be best to get advice from an experienced adviser, for example, at a Citizens Advice Bureau. To find your nearest CAB, including th

26、ose that give advice by e-mail, click onnearest CAB.For more information about making a claim to an employment tribunal, seeEmployment tribunals.The (lack of) air up there Watch mCayman Islands-based Webb, the head of Fifas anti-racism taskforce, is in London for the Football Associations 150th anni

27、versary celebrations and will attend Citys Premier League match at Chelsea on Sunday.I am going to be at the match tomorrow and I have asked to meet Yaya Toure, he told BBC Sport.For me its about how he felt and I would like to speak to him first to find out what his experience was.Uefa hasopened di

28、sciplinary proceedings against CSKAfor the racist behaviour of their fans duringCitys 2-1 win.Michel Platini, president of European footballs governing body, has also ordered an immediate investigation into the referees actions.CSKA said they were surprised and disappointed by Toures complaint. In a

29、 statement the Russian side added: We found no racist insults from fans of CSKA.Age has reached the end of the beginning of a word. May be guilty in his seems to passing a lot of different life became the appearance of the same day; May be back in the past, to oneself the paranoid weird belief disil

30、lusionment, these days, my mind has been very messy, in my mind constantly. Always feel oneself should go to do something, or write something. Twenty years of life trajectory deeply shallow, suddenly feel something, do it.一字开头的年龄已经到了尾声。或许是愧疚于自己似乎把转瞬即逝的很多个不同的日子过成了同一天的样子；或许是追溯过去，对自己那些近乎偏执的怪异信念的醒悟，这些天以

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32、t those things are optional; Junior high school, thought to have a crush on just means that the real growth, but over the past three years later, his writing of alumni in peace, suddenly found that isnt really grow up, it seems is not so important; Then in high school, think dont want to give vent t

33、o out your inner voice can be in the high school children of the feelings in a period, but was eventually infarction when graduation party in the throat, later again stood on the pitch he has sweat profusely, looked at his thrown a basketball hoops, suddenly found himself has already cant remember h

34、is appearance.童年时，觉得压岁钱和新衣服是过年必备，但是随着年龄的推进，会越来越发现，那些东西根本就可有可无；初中时，以为要有一场暗恋才意味着真正的成长，但三年过去后，自己心平气和的写同学录的时候，突然就发现是不是真正的成长了，好像并没有那么重要了；然后到了高中，觉得非要吐露出自己的心声才能为高中生涯里的懵懂情愫划上一个句点，但毕业晚会的时候最终还是被梗塞在了咽喉，后来再次站在他曾经挥汗如雨的球场，看着他投过篮球的球框时，突然间发现自己已经想不起他的容颜。Originally, this world, can produce a chemical reaction to an e

35、vent, in addition to resolutely, have to do, and time.原来，这个世界上，对某个事件能产生化学反应的，除了非做不可的坚决，还有，时间。A persons time, your ideas are always special to clear. Want, want, line is clear, as if nothing could shake his. Also once seemed to be determined to do something, but more often is he backed out at last. D

36、islike his cowardice, finally found that there are a lot of love, there are a lot of miss, like shadow really have been doomed. Those who do, just green years oneself give oneself an arm injection, or is a self-righteous spiritual.一个人的时候，自己的想法总是特别地清晰。想要的，不想要的，界限明确，好像没有什么可以撼动自己。也曾经好像已经下定了决心去做某件事，但更多的

37、时候是最后又打起了退堂鼓。嫌恶过自己的怯懦，最终却发现有很多缘分，有很多错过，好像冥冥之中真的已经注定。那些曾经所谓的非做不可，只是青葱年华里自己给自己注射的一支强心剂，或者说，是自以为是的精神寄托罢了。At the moment, the sky is dark, the air is fresh factor after just rained. Suddenly thought of blue plaid shirt; Those were broken into various shapes of stationery; From the corner at the beginning

38、 of deep friendship; Have declared the end of the encounter that havent start planning. Those years, those days of do, finally, like youth, will end in our life.此刻，天空是阴暗的，空气里有着刚下过雨之后的清新因子。突然想到那件蓝格子衬衫；那些被折成各种各样形状的信纸；那段从街角深巷伊始的友谊；还有那场还没有开始就宣告了终结的邂逅计划那些年那些天的非做不可，终于和青春一样，都将在我们的人生中谢幕。Baumgartner the disa

39、ppointing news: Mission aborted. r plays an important role in this mission. Starting at the ground, conditions have to be very calm - winds less than 2 mph, with no precipitation or humidity and limited cloud cover. The balloon, with capsule attached, will move through the lower level of the atmosph

40、ere (the troposphere) where our day-to-day weather lives. It will climb higher than the tip of Mount Everest (5.5 miles/8.85 kilometers), drifting even higher than the cruising altitude of commercial airliners (5.6 miles/9.17 kilometers) and into the stratosphere. As he crosses the boundary layer (c

41、alled the tropopause),e can expect a lot of turbulence.The supersonic descent could happen as early as Sunda.The weatheThe balloon will slowly drift to the edge of space at 120,000 feet ( Then, I would assume, he will slowly step out onto something resembling an Olympic diving platform.Below, the Ea

42、rth becomes the concrete bottom of a swimming pool that he wants to land on, but not too hard. Still, hell be traveling fast, so despite the distance, it will not be like diving into the deep end of a pool. It will be like he is diving into the shallow end. Skydiver preps for the big jumpWhen he jumps, he is expected to reach the speed of sound - 690 mph (1,110