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1、first compliance review of the application of the appraisal committee, only through the compliance review of the application to take part in a detailed review. 8.1 application compliance review: does not meet one of the following conditions, procuratorial agency to submit application through complia
2、nce reviews, be invalidated: (1) application of the formats, contents, meet the requirements of selected files, powers of attorney, declarations by the legal representative and the tender agent application to meet the requirements; (2) licence and a bidding agent qualifications meet the requirements
3、; (3) the similar project tendering agency agent number and provide proof of material compliance; (4) the tendering agency intends to put into this project the number of professionals to meet the requirements; (5) are intended to the agent of the project as a project manager has similar projects the
4、 number of and references to meet the requirements; (6) no fraud case. 8.2 application review in detail the evaluation committee through compliance reviews will be selected for detailed review of the application. 8.2.1 tender agent institutions similar project tender performance requirements (16 poi
5、nts) tender agent institutions similar project tender performance 16 points, by two part composition (1) agent similar project of cumulative bid amount scored calculation rules for: agent water project bid amount (on january 1, 2007 has has bid notice for associate) cumulative each reached 100 milli
6、on yuan have 2 points, water project cumulative bid amount scored up not over 6 points. in addition, completes a bid worth more than 500 million yuan in total 1 minute, but other items score accumulated winning amount up to a maximum of 6 points. (2) calculation rule for the number of agents similar
7、 projects: proxy bid amount (since january 1, 2007 winning notice shall prevail) bidding projects in more than 50 million yuan by 2 points, but the agency projects the number of scores up to 3 minutes. 8.2.2 to be agents of the construction project as a project manager in the same project performanc
8、e (10 points) project manager agent performance scores including agents of the bidding agencies of similar projects, as well as in other similar project tendering agency service agent during performance. total 10 project manager agent performance, made up of two parts (1) acting like the accumulated
9、 winning amount calculation rule: agents for water conservancy project bid amount (since january 1, 2007 winning notice for example) cumulative average reached 100 million yuan 3 but scored no more than 5 minutes. (2) calculation rule for the number of agents similar projects: proxy bid amount (sinc
10、e january 1, 2007 winning notice for example) in the more than 50 million yuan water conservancy project period of 3 minutes, but scores the number of agents similar projects up to a maximum of 5 points. project manager demonstrated to provincial-level and higher people's government or the devel
11、opment and reform commission published the winning bidder on the designated media publicity shall prevail. 8.2.3 staff requirement (25 points) 1, to the construction project serving personnel, 4 years experience in tendering agent, 2 points per person, 2 years experience in tendering agent .pig is n
12、ot a pig. with domestic international market and technology big environment of changes, as china traditional industry of pig production of job way and profit way are requirements related industry for resources integration, to quality security for premise, regulation based farming, and management cos
13、t and the production, and sales cost, go standardization, and scale, and intensive, and market road, fast upgrade whole industry chain of regulation capacity, market competition capacity and anti-risk capacity. first, industry analysis (a) the basic situation in china is a traditional hog production
14、 and consumption country, 2008 46.15 million tons of pork, pig stock 462.64 million head by the end pig slaughter 609.6 million. national pig industry's annual production value at around 650 billion yuan, nearly 50% per cent of annual output value of animal husbandry. sichuan province in 2008 pr
15、oduced 6.52 million tons of pork, with 694,000 tons of chengdu city, live pig sell 10.46 million, first 15 vice-provincial cities in the country. the whole nation advantage regional planning (2008-2015) there are 437 counties (cities), 55, sichuan, chengdu has 7 (including in pengzhou). internationa
16、l pig industry mainly include the european union, the united states, and canada, and brazil and other absolute scale of animal husbandry industry and technology developed countries. market 1, the domestic market from china's meat consumption habits and economic analysis of the development situat
17、ion, the emergence of new trends in the market of domestic pork and its products. docking is a pig production and sales more closely. the yangtze river delta, pearl river delta and the bohai rim economic developed area industrial structure adjustment gathered pace, two or three industries to the cen
18、tral and western bias. second, the rigid domestic consumption growth. for a long period, pork is still the largest variety of meat consumption in china, the absolute consumption continues to grow. especially in the vast rural market growth potential. third, market for pork and higher product quality
19、 requirements. pollution-free pork safety and health has shown a very good market prospects. four is the market changing. currently, cold meat, more and more varieties of meat and pork meat products, which accounted for a large proportion of pork consumption, stores, chain stores, supermarkets and o
20、ther marketing methods is on the rise, and transport has been extended to more than 2000 km in radius. chengdu is an important "river pig" resource market, the city's commercial rate reaches above 60% of live pigs, pork and raw materials primary processing products in the domestic and
21、international reputation is high. western hog trading center in chengdu and provides disease-free areas of construction in order to further accelerate the development of swine industry realizes space and conditions. 2, the international markets at present, annual volume of trade in live pigs in the
22、world year around 18 million, about 6 million tons of pork trade. a large net exporter of pork is mainly the eu and north america,-importing countries mainly in asia, japan, and korea, and singapore, the philippines, hong kong and other countries and regions, as well as russia, about 3 million tonne
23、s were imported. it is predicted that the world meat consumption increase of 80% in asia in the future, our country has obvious geographical advantages, export potential. with the advancement of live pigs superiority industry belt construction, animal disease .机械课程设计设计题目:型砂搅拌机的传动装置两级圆柱齿轮减速器姓名: 学号: 专
24、业班级:目 录摘要 第一章 绪论 1.1 引言1.2 目的第二章 设计项目 2.1 已知数据 2.2 传动方案的选择 2.3 电动机的选择 2.4 传动比的计算与分配 2.5 传动参数的计算 2.6 各级传动零件的设计计算 2.7 轴的尺寸设计按许用应力计算 2.8 联轴器的选择 2.9 键的选择按轴颈选择 2.10 滚动轴承的选择 2.11 箱体及减速器附件说明 2.12 滚动轴承的外部密封装置第三章装配图设计第四章零件图设计第五章 个人小结第六章 参考文献 第一章 绪论1.1 引言机械设计综合课程设计是对我们一个学年内学习状况的考察,也是锻炼同学自主创新、设计及思考的一项课题。本次机械设计
25、课程设计的主题为“二级展开式圆柱齿轮减速器”,在设计过程中涉及到了很多在过去的一年中我们所学到的知识,例如齿轮、轴和与它们相关的知识。这次是我们第一次接触实际进行设计,相信无论对于我们知识的强化还是创新能力、思考能力都是一次锻炼和挑战。1.2 目的综合运用机械设计基础、机械制造基础的知识和绘图技能,完成传动装置的测绘与分析,通过这一过程全面了解一个机械产品所涉及的结构、强度、制造、装配以及表达等方面的知识,培养综合分析、实际解决工程问题的能力。第二章 设计项目2.1 已知数据设计要求: 单班制工作,单向运行,有轻微的振动,启动载荷为名义载荷的1.5倍,减速器成批生产设计基本参数: 组号 4-2
26、 碾盘主轴转速(r/min) 15 锥齿轮传动比i 3.5碾盘主轴扭矩(n.m)750每天工作时数/h8传动工作年限/a102.2 传动方案设计传动方案:电动机通过联轴器输入到双级圆柱齿轮减速器,其中高速级采用圆柱斜齿轮,低速级采用圆柱直齿轮。然后低速级通过联轴器,锥齿轮传动输入到磨盘上。设计图例:2.3 电动机的选择选用y100l-6型三相异步电机,其参数如下:(1) 额定功率:1.5kw(2) 启动转矩:2.2 n.m(3) 同步转速:1000r/min(4) 满载转速:940r/min(5) 伸出端直径:80mm(6)(6) 伸出端安装长度:60mm(7) 中心高度:100mm(8) 外
27、形尺寸:380*205*2452.4 传动装置的总传动比的确定与传动比的分配(1) 总传动比的确定原始数据给出准齿轮的传动比为3.8,总传动比为940/15=63则减速箱的总传动比为i=63。i锥=3.5(2)传动比的分配对于二级圆柱齿轮减速器,i1=(1.31.5)i2由此计算得:又i总=i1* i2*i锥i1=5.2 i2=3.52.5计算传动装置的运动和动力参数(1)各轴的转速磨盘转轴: n3=n4*i3=15*3.5 =52.5r/min3轴: n2=n3*i2=52.5*3.5=183.75r/min 2轴: n1=n2*i1 =183.75*5.2=940r/min1轴:n1=nm
28、=940r/min(2)各轴的输入功率主轴功率 td=9550*p4/nm,而n=15, t4=750 n.m, 则p4 =1178w联轴器的效率1=0.99,滚子轴承的效率2=0.98圆柱齿轮传动的效率3=0.98,锥齿轮传动的效率4=0.98传动系统各级之间的效率分别为:01=1=0.99,12=23=0.96,23=23=0.94,34=12234=0.92系统的总效率为=01122334=1224324=0.844轴:p4=p334=pd1224324=1178w p3 =1280w3轴:p3=p223=pd12232=1280w p2 =1362w2轴:p2=p112=pd123=1
29、362w p1 =1419w1轴:p1=pd01= pd1=1419w pd =1433w 故选择1500w电动机 (3)各轴的输出转矩电动机的输出转矩为td=9550*pd/nm=9550*1.5/940=15.24n.m13轴的输入转矩为:1轴:t1= td01=15.09n.m2轴:t2= t1 i112=75.32n.m3轴:t3= t2 i223=247.79n.m磨盘轴的输入转矩为t4= t3 i334=797.90n.m轴名转矩/n.m转速(r/min)功率 /kw输入输出电机轴1.515.24940高速轴1.41914.4215.09940中间轴1.36270.7975.321
30、8375低速轴1.280232.84247.7952.5磨盘轴1.178750797.9015运动和动力参数整理如下表:2.6 传动零件的设计计算六.设计高速级齿轮1选精度等级、材料及齿数,齿型1)确定齿轮类型两齿轮均为标准圆柱斜齿轮2)材料选择小齿轮材料为(调质),硬度为,大齿轮材料为钢(调质),硬度为hbs,二者材料硬度差为hbs。)运输机为一般工作机器,速度不高,故选用7级精度4)选小齿轮齿数1,大齿轮齿数21·15.2×24=124.8,取z2=125。5)选取螺旋角。初选螺旋角2按齿面接触强度设计按式(1021)试算,即)确定公式内的各计算数值()试选 ()由图,
31、选取区域系数()由图查得 ()计算小齿轮传递的转矩 =95.51.419/940=1.4416n.mm()由表选取齿宽系数()由表查得材料的弹性影响系数()由图按齿面硬度查得小齿轮的接触疲劳强度极限,大齿轮的接触疲劳强度极限()由式计算应力循环次数=60940=()由图查得接触疲劳强度寿命系数()计算接触疲劳强度许用应力取失效概率为,安全系数为s=1,由式得)计算()试算小齿轮分度圆直径,由计算公式得=29.31mm()计算圆周速度 =1.44m/s()计算齿宽及模数=11.18mm=2.25b/h=29.31/2.655=11.04()计算纵向重合度()计算载荷系数k已知使用系数根据v=1.
32、44m/s,级精度,由图查得动载荷系数由表查得 由图查得假定,由表查得故载荷系数()按实际的载荷系数校正所算得的分度圆直径,由式得29.31 =32.64mm()计算模数32.64/24=1.323按齿根弯曲强度设计由式) 确定计算参数()计算载荷系数()根据纵向重合度,从图查得螺旋角影响系数()计算当量齿数 ()查取齿形系数由表查得()查取应力校正系数由表查得()由图查得,小齿轮的弯曲疲劳强度极限大齿轮的弯曲疲劳强度极限()由图查得弯曲疲劳强度寿命系数()计算弯曲疲劳许用应力取弯曲疲劳安全系数s1.4,由式得()计算大小齿轮的大齿轮的数据大) 设计计算对比计算结果,由齿面接触疲劳强度计算的法
33、面模数大于由齿根弯曲疲劳强度计算的法面模数,取1.5mm,已可满足弯曲强度。但为了同时满足接触疲劳强度,须按接触疲劳强度算得的分度圆直径来计算应有的齿数。于是有=21.11取,则,取4几何尺寸计算计算中心距100.51)将中心距圆整为101mm)按圆整后的中心距修正螺旋角因值改变不多,故参数、等不必修正。) 计算大、小齿轮的分度圆直径 32.63mm169.38mm) 计算大、小齿轮的齿根圆直径28.88mm165.63mm) 计算齿轮宽度) 1圆整后取; 5验算833.3n25.53n/mm<100n/mm合适七.设计低速级齿轮1选精度等级、材料及齿数,齿型1)确定齿轮类型两齿轮均为标
34、准圆柱直齿轮2)材料选择小齿轮材料为(调质),硬度为,大齿轮材料为钢(调质),硬度为hbs,二者材料硬度差为hbs。)运输机为一般工作机器,速度不高,故选用7级精度4)选小齿轮齿数1,大齿轮齿数21·13.5×24=84。 2按齿面接触疲劳强度设计由设计计算公式进行试算,即 ) 确定公式各计算数值() 试选载荷系数() 计算小齿轮传递的转矩95.5 n.mm() 由表选取齿宽系数() 由表查得材料的弹性影响系数() 由图按齿面硬度查得小齿轮的接触疲劳强度极限大齿轮的接触疲劳强度极限()由式计算应力循环次数60=()由图查得接触疲劳强度寿命系数()计算接触疲劳强度许用应力取失
35、效概率为,安全系数为s=1,由式得 ) 计算() 试算小齿轮分度圆直径,代入中的较小值=54.34mm() 计算圆周速度v =0.52m/s计算齿宽 =1计算齿宽与齿高之比2.264mm=2.25b/h=54.34/5.094=10.67() 计算载荷系数k 根据v=0.52m/s,级精度,由图查得动载荷系数 假设,由表查得 由表查得使用系数由表查得 由图2查得故载荷系数()按实际的载荷系数校正所算得的分度圆直径,由式得54.34 =57.27mm()计算模数m =d1/z1 =57.27/24=2.393按齿根弯曲强度设计由式得弯曲强度的设计公式为) 确定公式内的计算数值() 由图查得小齿轮
36、的弯曲疲劳强度极限大齿轮的弯曲疲劳强度极限() 由图查得弯曲疲劳寿命系数 () 计算弯曲疲劳许用应力 取失效概率为,安全系数为s=1.4,由式得 () 计算载荷系数()查取齿形系数由表查得()查取应力校正系数 由表查得()计算大小齿轮的,并比较大齿轮的数据大) 设计计算mm对比计算结果,由齿面接触疲劳强度计算的模数大于由齿根弯曲疲劳强度计算的模数,可取有弯曲强度算得的模数1.84,并就近圆整为标准值2。但为了同时满足接触疲劳强度,须按接触疲劳强度算得的分度圆直径d1=57.27mm来计算应有的齿数。于是有z1=d1/m1=57.27/2=28.64取z1=29大齿轮齿数取4几何尺寸计算) 计算
37、分度圆直径d 1=m1d 2=m1) 计算齿根圆直径df1=d1-2m=58-2=54df2=d2-2m=202-2=198) 计算中心距a =(d1+d2)/2=(58+202)/2=130计算齿宽 ) =1取b2=60mmb1=65mm5验算2592.2n44.78n/mm<100n/mm合适设计数据如图(高速)名称代号单位小齿轮大齿轮中心距amm101传动比i5.2模数mm1.5螺旋角°14.86齿数z21109分度圆直径dmm33170齿根圆直径mm30167齿顶圆直径mm36.5173.5齿宽bmm3540(低速)名称代号单位小齿轮大齿轮中心距amm 130传动比i
38、3.5模数mmm 2齿数z 3275分度圆直径dmm 58202齿顶圆直径damm 62206齿根圆直径mm 53.5197.5齿宽bmm 6065九.减速器轴及轴承装置、键的设计1轴(输入轴)及其轴承装置、键的设计输入轴上的功率 p1=1.419kw n1=940r/min转矩t1=1.4416求作用在齿轮上的力 833.3n833.3=314.20n833.3=225.4n初定轴的最小直径选轴的材料为钢,调质处理。根据表,取(以下轴均取此值),于是由式初步估算轴的最小直径112=12.84mm输出轴的最小直径显然是安装联轴器处轴的直径.为了使所选的轴直径 与联轴器的孔径相适应,故需同时选取
39、联轴器型号.联轴器的计算转矩tca=kat1,查表14-1,考虑到转矩的变化很小,故取ka=1.3,则, tca=kat1 =1.3=18740.8n.mm 查机械设计手册,选用hl型弹性柱销联轴器,其公称转矩为160000n·。半联轴器的孔径,故取半联轴器长度l42,半联轴器与轴配合的毂孔长度。轴的结构设计 )拟定轴上零件的装配方案(见下图) )根据轴向定位的要求确定轴的各段直径和长度 ()为满足半联轴器的轴向定位要求,轴段右端需制处一轴肩,轴肩高度,故取段的直径 。半联轴器与轴配合的毂孔长度=30mm.,为了保证轴端挡圈只压在半联轴器上而不压在轴的端面上,故的长度应该比略短一点,
40、现取 (2)初步选择滚动轴承 参照工作要求并根据,初选型号6205轴承,其尺寸为,基本额定动载荷基本额定静载荷,故,轴段7的长度与轴承宽度相同,故取(3)取齿轮左端面与箱体内壁间留有足够间距,取。为减小应力集中,并考虑右轴承的拆卸,轴段4的直径应根据的深沟球轴承的定位轴肩直径确定(4)轴段5上安装齿轮,为便于齿轮的安装, 应略大与,可取.齿轮左端用套筒固定,为使套筒端面顶在齿轮左端面上,即靠紧,轴段5的长度应比齿轮毂长略短,若毂长与齿宽相同,已知齿宽,故取。齿轮右端用肩固定,由此可确定轴段6的直径, 轴肩高度,取,故取 为减小应力集中,并考虑右轴承的拆卸,轴段7的直径应根据的深沟球轴承的定位轴
41、肩直径确定,即,(5)取齿轮齿宽中间为力作用点,则可得,,(6)参考表152,取轴端为,各轴肩处的圆角半径见cad图。输入轴的结构布置5受力分析、弯距的计算 ()计算支承反力 在水平面上 232.27n 601.03n225.4n()在垂直面上99.24n314.20-99.24=214.96n总支承反力=338.53n=638.31n)计算弯矩并作弯矩图 ()水平面弯矩图 232.27 ()垂直面弯矩图99.24214.96 ()合成弯矩图 =31699.1 n.mm=30958.2 n.mm 3)计算转矩并作转矩图t=t1 =1.44166作受力、弯距和扭距图7选用键校核键连接:联轴器:选
42、单圆头平键(c型) 齿轮:选普通平键 (a型) 联轴器:由式, 查表,得 ,键校核安全齿轮: =7.42mpa查表62,得 ,键校核安全8按弯扭合成应力校核轴的强度由合成弯矩图和转矩图知,c处左侧承受最大弯矩和扭矩,并且有较多的应力集中,故c截面为危险截面。根据式,并取,轴的计算应力23.1mpa由表查得,故安全9校核轴承和计算寿命() 校核轴承a和计算寿命径向载荷=252.58n 轴向载荷225.4n由,在表取x0.56。相对轴向载荷为,在表中介于0.0250.040之间,对应的e值为0.220.24之间,对应y值为2.01.8,于是,用插值法求得,故x=0.56,y=1.952由表取则,a
43、轴承的当量动载荷,校核安全该轴承寿命该轴承寿命() 校核轴承b和计算寿命 径向载荷=638.31n 当量动载荷1.2 <cr,校核安全该轴承寿命该轴承寿命2轴(中间轴)及其轴承装置、键的设计1. 输入轴上的功率 p1=1.362kw n1=183.75r/min转矩t1=求作用在齿轮上的力高速大齿轮:=835.87n835.87=315.17n835.87226.13n低速小齿轮: =2441.03n=2441.03初定轴的最小直径 选轴的材料为钢,调质处理。根据表,取,于是由式初步估算轴的最小直径112=21.84mm;.这是安装轴承处轴的最小直径4根据轴向定位的要求确定轴的各段直径和
44、长度( 1 )初选型号6206的深沟球轴承参数如下基本额定动载荷基本额定静载荷 故。轴段1和7的长度与轴承宽度相同,故取,( 2 )轴段3上安装低速级小齿轮,为便于齿轮的安装,应略大与,可取。齿轮左端用套筒固定,为使套筒端面顶在齿轮左端面上,即靠紧,轴段3的长度应比齿轮毂长略短,若毂长与齿宽相同,已知齿宽,取。小齿轮右端用轴肩固定,由此可确定轴段4的直径, 轴肩高度,取,故取( 3)轴段5上安装高速级大齿轮,为便于齿轮的安装, 应略大与,可取。齿轮右端用套筒固定,为使套筒端面顶在齿轮右端面上,即靠紧,轴段5的长度应比齿轮毂长略短,若毂长与齿宽相同,已知齿宽,取。大齿轮左端用轴肩固定,由此可确定
45、轴段4的直径, 轴肩高度,取,故取。取齿轮齿宽中间为力作用点,则可得, ,(4)参考表152,取轴端为,各轴肩处的圆角半径见cad图。中间轴的结构布置5.轴的受力分析、弯距的计算1)计算支承反力: 在水平面上 1809.46n226.13n1467.44n在垂直面上:684.89n 故 518.74n总支承反力:1947.91n1556.43n2)计算弯矩在水平面上:1467.441809.46在垂直面上:26455.74n.mm30526.08n.mm684.8926455.74n.mm30526.08n.mm 故 =79377.98n.mm=121888.07n.mm=80825.74n.
46、mm3)计算转矩并作转矩图t=t2=n.mm6作受力、弯距和扭距图7选用校核键)低速级小齿轮的键由表选用圆头平键(a型) 由式,26.8mpa查表,得 ,键校核安全2)高速级大齿轮的键 由表选用圆头平键(a型) 由式, 33.5mpa查表,得 ,键校核安全8按弯扭合成应力校核轴的强度 由合成弯矩图和转矩图知,2处当量弯矩最大,并且有较多的应力集中,为危险截面根据式,并取 31.2mpa由表查得,校核安全。9校核轴承和计算寿命)校核轴承a和计算寿命径向载荷1934.7n轴向载荷226.13n,查表13-5得x=1,y=0,按表13-6,取,故1934.7n因为,校核安全。该轴承寿命该轴承寿命34
47、368.8h)校核轴承b和计算寿命 径向载荷1556.43n 当量动载荷,校核安全该轴承寿命该轴承寿命66011h查表13-3得预期计算寿命,故安全。3.轴(输出轴)及其轴承装置、键的设计输入轴上的功率 p3=1.280 kw n3=52.5r/min转矩t3= 2 第三轴上齿轮受力2305.3n2305.33初定轴的直径与圆锥的联轴器:选轴的材料为钢,调质处理。根据表,取(以下轴均取此值),于是由式初步估算轴的最小直径112=32.5mm这是安装链轮处轴的最小直径d=38mm联轴器的计算转矩tca=kat1,查表14-1,考虑到转矩的变化很小,故取ka=1.7,则, tca=kat1 =1.
48、7=395824.6n.mm 查机械设计手册,选用hl型弹性柱销联轴器,其公称转矩为630000n·。半联轴器的孔径d1=38mm,故取d1=38mm半联轴器长度l82,半联轴器与轴配合的毂孔长度l=60mm。轴的结构设计 )拟定轴上零件的装配方案(见下图) )根据轴向定位的要求确定轴的各段直径和长度 ()为满足半联轴器的轴向定位要求,轴段右端需制处一轴肩,轴肩高度,半联轴器与轴配合的毂孔长度=60mm.,为了保证轴端挡圈只压在半联轴器上而不压在轴的端面上,故的长度应该比略短一点,现取l1=56mm4轴的结构设计)拟定轴的结构和尺寸(见下图)根据轴向定位的要求确定轴的各段直径和长度(
49、1)轴段2和轴段7用来安装轴承,根据,初选型号6309的深沟球轴承,参数基本: 基本额定动载荷基本额定静载荷。由此可以确定: (2)为减小应力集中,并考虑左右轴承的拆卸,轴段3和6的直径应根据6309的深沟球轴承的定位轴肩直径确定,即,取( 3)轴段5上安装低速级大齿轮,为便于齿轮的安装, 应略大与,可取。齿轮左端用套筒固定,为使套筒端面顶在齿轮右端面上,即靠紧,轴段5的长度应比齿轮毂长略短,若毂长与齿宽相同,已知齿宽b=65mm,取l5=60mm 。大齿轮右端用轴肩固定,由此可确定轴段4的直径, 轴肩高度,取,故取。(4)取齿轮左端面与箱体内壁间留有足够间距,取(5)取齿轮齿宽中间为力作用点,则可得, ,(6)参考表152,取轴端为,各轴肩处的圆角半径见cad图。输出轴的结构布置5.轴的受力分析、弯距的计算()计算支承反力 在水平面上1947.8n 357.5n在垂直面上533.5n故839.1-533.5=305.6n(2)计算弯矩)水平面弯矩 在c处,357.5 在b处,-2453=-136158.2)垂直面弯矩 在c处533.533610.5()合成弯矩图 在c处=40459.0在b处, 136158.2n.mm(4)计算转矩,并作转矩图t=t3= (cd段)6作受力、弯距
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