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ID:60993511
大小:1.69 MB
页数:33页
时间:2021-01-18
《带-齿轮传动-轴的设计实例.ppt》由会员上传分享,免费在线阅读,更多相关内容在行业资料-天天文库。
1、设计一带式运输机传动系统中第一级用的V带传动。已知:电动机型号为Y112M-4,额定功率P=4kW,转速n1=1420r/min,n2=400r/min,每天运转时间不超过10h。V带传动设计实例分析设计计算项目设计计算依据结论ⅠⅡ工况系数KAPC(kW)选V带型号小轮直径d1(mm)验算带速v(m/s)大轮直径d2(mm)表8-10图8-12PC=KAP表8-8及推荐标准值V=πd1n1/60000,要求V在5~25m/sd2=d1n1/n2,应取标准值1.14.4Z型A型801006.037.54280355设计计算项目设计计算依据结论方案Ⅰ方案Ⅱ从动轮转速n2
2、′(r/min)n2′=n1d1/d2411406从动轮转速误差(n2′-n2)/n2应不超过±0.05+0.028+0.015初定中心距ɑ0(mm)0.7(d1+d2)≦ɑ0≦2(d1+d2)252≦≦720初定280318.5≦≦910初定350初算带长Lc(mm)Lc=2ɑ0+π(d1+d2)/2+(d2-d1)2/4ɑ011611461确定基准长度Ld(mm)表8-612501600确定中心距ɑ(mm)ɑ≈ɑ0+(Ld-Lc)/2325420ɑmin(mm)ɑmin=ɑ-0.015Ld306396ɑmax(mm)ɑmax=ɑ+0.03Ld363468设计计算
3、项目设计计算依据结论方案Ⅰ方案Ⅱ验算包角≥120o144.7°145.2°单根带基本额定功率P1(kW)表8-30.3441.31传动比i≈d2/d13.3443.55功率增量△P1(kW)表8-40.030.10包角系数Kα表8-50.910.91长度系数KL表8-61.110.99单根带许用功率[P](kW)[P]=(P1+△P1)KLKα0.3781.27V带根数zZ≥PC/[P],不宜超过推荐轮槽数11.65取12>Zmax=43.465取44、力F0(N)55.3133.7轴上的压力FQ(N)FQ≈2zF0sin(α1/2)12811020.7设计方案评价考虑传动结构的紧凑性及合理的V带根数等不好较好设计结果(方案Ⅱ),A1600GB/T1771—1996,4根;KA=1.1交流电动机,轻载启动工作机载荷变动小每天工作时间<10小时工况系数KA工况KA空轻载启动重载启动每天工作时间(h)<1010-16>16<1010-16>16载荷变动最小液体搅拌机等1.01.11.21.11.21.3载荷变动小带式运输机等1.11.21.31.21.31.4载荷变动较大起重机等1.21.31.41.41.51.6载荷5、变动最大破碎机等1.31.41.51.51.61.8轻载启动<10载荷变动小1.1表8-7工况系数KA图8-12普通V带选型图计算功率小带轮转速ADEdd=80~100Zdd=50~71dd=75~100dd=112~140Bdd=125~140dd=160~200Cdd=200~315dd=355~400dd=450~50014204.4计算功率Pc=4.4kW小带轮转速n1=1420r/minZ型A型同时计算表8-3单根普通V带的基本额定功率P1如:Z型V带、d1=80mm、n1=1420r/min时,P0=0.344kWA型V带、d1=100mm、n1=1426、0r/min时,P0=1.31kW带型d1mmn1r/min800950120014501600Z630.150.200.220.180.230.260.220.270.300.250.300.350.270.330.397180A750.450.680.831.001.190.510.770.951.151.370.600.931.141.391.660.681.071.321.611.920.731.151.421.742.0790100112125100A1.31142080Z0.344表8-4单根普通V带额定功率的增量P0kW带型传动比i带速m/sv≦1.07、0~1.011.02~1.041.05~1.081.09~1.121.13~1.181.19~1.241.25~1.341.35~1.511.52~1.99≥2.0∆P1kWA0.000.010.020.030.050.090.100.110.150.170.190.240.292.556.78.31012.51517.520250.020.030.030.040.050.060.060.080.100.020.040.040.050.070.080.090.110.130.030.050.050.060.080.090.110.130.160.030.060.
4、力F0(N)55.3133.7轴上的压力FQ(N)FQ≈2zF0sin(α1/2)12811020.7设计方案评价考虑传动结构的紧凑性及合理的V带根数等不好较好设计结果(方案Ⅱ),A1600GB/T1771—1996,4根;KA=1.1交流电动机,轻载启动工作机载荷变动小每天工作时间<10小时工况系数KA工况KA空轻载启动重载启动每天工作时间(h)<1010-16>16<1010-16>16载荷变动最小液体搅拌机等1.01.11.21.11.21.3载荷变动小带式运输机等1.11.21.31.21.31.4载荷变动较大起重机等1.21.31.41.41.51.6载荷
5、变动最大破碎机等1.31.41.51.51.61.8轻载启动<10载荷变动小1.1表8-7工况系数KA图8-12普通V带选型图计算功率小带轮转速ADEdd=80~100Zdd=50~71dd=75~100dd=112~140Bdd=125~140dd=160~200Cdd=200~315dd=355~400dd=450~50014204.4计算功率Pc=4.4kW小带轮转速n1=1420r/minZ型A型同时计算表8-3单根普通V带的基本额定功率P1如:Z型V带、d1=80mm、n1=1420r/min时,P0=0.344kWA型V带、d1=100mm、n1=142
6、0r/min时,P0=1.31kW带型d1mmn1r/min800950120014501600Z630.150.200.220.180.230.260.220.270.300.250.300.350.270.330.397180A750.450.680.831.001.190.510.770.951.151.370.600.931.141.391.660.681.071.321.611.920.731.151.421.742.0790100112125100A1.31142080Z0.344表8-4单根普通V带额定功率的增量P0kW带型传动比i带速m/sv≦1.0
7、0~1.011.02~1.041.05~1.081.09~1.121.13~1.181.19~1.241.25~1.341.35~1.511.52~1.99≥2.0∆P1kWA0.000.010.020.030.050.090.100.110.150.170.190.240.292.556.78.31012.51517.520250.020.030.030.040.050.060.060.080.100.020.040.040.050.070.080.090.110.130.030.050.050.060.080.090.110.130.160.030.060.
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