皮带轮传动计算方法

皮带轮传动计算方法已知：机外静压值Pst；风量Q；机组压损AP；所选风机型号求：机组皮带轮型号，皮带型号解：1.求全压P01） 根据风机性能曲线与风量值定出动压值Pd（定风机型号时，注意风量Q值对应的出口风速在10〜15m/s为好）2） 机组压损厶P计算蒸发器：△P1过滤网：△P2辅助电加热部件：△P3其它：△P4=30Pa3）P=P+P+AP0std2.求风机内功率Nin0；风机转速n2根据全压值与风量值查找风机性能曲线，找其交点，定风机内功率值Nin0与风机转速n2；对于双风机，风机性能见下：风量： 曲线图上值X2转速： 曲线图上值X1.05内功率： 曲线图上值X2.15噪声： 曲线图上值+3dB（A）3•选用电机功率P1） 求风机轴功率NSNS=Nin0/nm(nm=0・95)nm—风机机械效率风机传动方式nm电机直联传动1联轴器直联传动0.98三角皮带传动0.952）求配套电机的功率NN=NSXK（K值选取见下）K——电机容量安全系数电机功率(Kw)k值W2.21.2W111.15>111.1计算功率Pc=KaXN(Ka为工作情况系数，我们一般取1.0)根据PC值选取电机型号，定电机功率P求传动比I1)根据电机选型手册定电机转速n1i=n1/n2定电机皮带轮d](皮带轮型号一般选取SPA)原则1：电机皮带轮不要过小;一般$100原因：小带轮直径决定了带的弯曲程度，小带轮越小，皮带弯曲越厉害；同时小带轮越小，则带速偏低，由于P=FV，则F偏大，对带的寿命影响较大。原则2：根据传动比计算出的大带轮不要过大；一般W1/2倍叶轮直径原因：风机皮带轮过大将造成机组进风阻力较大，影响机组性能原则3：带速v=ndp/60*1000WV11max对窄V带，V=35〜40,为了充分发挥窄V带的传动动力，应max使v~20m/s定风机皮带轮d2d2=d1Xi定中心距a范围中心距的大小决定了带长，带长越长，带在单位时间内受弯曲的次数越少，一般建议中心距范围：0.7d1+d2)<a<2d1+d2)另根据机组结构定中心距范围，与上面的范围取值8•定皮带长度L方法1：直接在三维图上量取皮带的近似长度，然后根据该近似长度来确定标准带长方法2：根据公式Ld0=2a0+n(d]+d2)/2+(d1-d2)2/4a°

其中a0为处于中心距范围内的自定的中心距9•定皮带数量z1） 根据电机皮带轮型号与电机转速根据机械手册定查取单根皮带所能传递的功率P1;（见下表）2） 根据电机皮带轮型号与电机转速与传动比根据机械手册定查取传动比的额定功率增量厶P］；（见下表）3） 根据z=P/（P1+AP］）KaKL（其中Ka为小带轮包角修正系数，KL为带长修正系数）（我们在具体计算时经常忽略KKt等参数）a，L10.校核电机皮带轮的包角aa=180°-(d2-d1)X57.3°$120°表15-91）SP迟型霍V带的额定功率（摘自GB/T13575.1—1992）单根v带的腥本额定功半PjAWrVl时额宦功率的增MiPj/kW小带轮转速3.380.6810.720.76O.BO0..51W|63\80W1001122000.200.250.280.310,370.430.51400A350,440.490.550.670,790.93730^0.56(1.72G.790.S81.121.331.578000.600.780.870.991.211,441,70980①0.700.921.02■1.151.441,兀2.0212(X)0.81I.OK1.21I381.702.02单根v带的腥本额定功半PjAWrVl时额宦功率的增MiPj/kW小带轮转速3.380.6810.720.76O.BO0..51W|63\80W1001122000.200.250.280.310,370.430.51400A350,440.490.550.670,790.93730^0.56(1.72G.790.S81.121.331.578000.600.780.870.991.211,441,70980①0.700.921.02■1.151.441,兀2.0212(X)0.81I.OK1.21I381.702.022.401460r?0.931.251.41k6O1.982.362㈱16001.0U1.35J.521.732342,553.G420001.171.591.792.052.553,053.6224001.321.812.042.342.933.494.162800®1.452.OJ2.272.613.263.904.6432001.562.IK2.482.853.574.265.063600Lfi62.332.653.063.844.585.4240001.742.462.SI3-244,074.855.7245001.812.592.963.424.305.105.9950(X11.K52屈3.073.564.465.276,14小带轮的呈准宜径^,/mrn1.11D.0I0.010.010.020.020.030.030.030.040.050,000.0110.030.050.060.080.100.1]0.<XW.0lO.03iG.05D.000.040.^20.000.040.025.OTO.O8O.10QJ10,060.0810.10(0.12(0.1330.15U_U8lO.ldO.13KJJ20.050.090.130.tl.100.0(X)020.060.000.030.070.130.000.030.000.140.170.170.210*090.15G.0.040.100.180.24Io.oon.o40.J2(L00(0.050.130.000.05.000.D60.21a2©0.22kl.250.280.300.25kJ.3W0.33|0.360-300,350.390.0.2S0.340.400.450.230.31(}.380.450.50U.55表15-9iSPA型窄V带的额定功率（摘自GB/T13575.1—1992）单根V带的基本额定功率P^/kW 时额定功率的增量△Pt/kW小带轮转速刃1/r*min"1小带轮的基准直径ddi/mm传动比i带速V/m*s_901001121251401601802001.001.011.021.051.061.111.121.181.191.261.271.381.391.571.581.941.953.38A3.392000.430.530.640.770.921.111.301.490.000.010.020.030.040.050.060.070.080.084000.750.941.161.401.682.042.392.750.000.010.040.070.090.110.130.140.160.165730①1.211.541.912.332.813.424.034.630.000.020.070.120.160.200.230.260.280.308001.301.652.072.523.033.704.365.010.000.030.080.130.180.220.250.290.310.33980①1.521.932.442.983.584.385.175.940.000.030.090.160.210.260.300.340.370.401n12001.762.272.863.504.235.176.107.000.000.040.110.200.270.330.380.430.470.491U151460①2.022.613.314.064.916.017.078.100.000.050.140.240.320.390.460.510.560.5916002.162.803.574.385.296.477.628.720.000.060.160.260.360.430.510.570.620.6620002.493.274.185.156.227.60&9010.130.000.070.190.330.450.540.640.710.780.822024002.773.674.715.807.01&539.9311.220.000.080.230.390.540.650.760.860.930.992800①3.003.995.156.347.649.2410.6711.920.000.100.260.460.630.760.891.001.091.1532003.164.255.496.768.119.7211.0912.190.000.110.300.530.720.871.021.141.251.323036003.264.425.727.038.399.9411.1511.980.000.120.340.590.810.981.141.291.401.483540003.294.505.857.168.489.8710.8111.250.000.140.380.660.891.081.271.431.561.654045004.244.485.837.098.279.349.789.500.000.160.420.741.011.221.431.611.751.8550003.074.315.616.757.698.287.996.750.000.170.470.821.121.361.591.791.952.06①为常用转速。表15-9jSPB型窄V带的额定功率（摘自GB/T13575.1—1992）单根V带的基本额定功率P,/kW iHl时额定功率的增*ZiP,/kW小带轮转速/r-min_l■小带轮的基准直径传动比i带速V/m-s"a1401601802002242502803151.001.011.021.051.061.111.121.181.191.261.271.381.391.571.581.941.953.38A3.392001.081.371.651.942.282.643.053.530.000.010.040.070.W0.110.130.150.160.175104001.922.473.013.544.184.865.636.530.000.030.080.140.190.220.260.300.320.34730①3.134.064.995.886.97&119.4110.910.000.050.140.250.330.400.470.530.580.628003.354.375.376.357.52&7510.1411.710.000.060.160.270.370.450.530.590.650.6815980®3.925.136.317.478.8310.2711.8913.700.000.070.190.330.450.540.630.710.780.8212004.555.987.38&7410.3311.9913.8215.840.000.090.230.410.560.670.790.890.971.0320251460®5.216.89&5010.0711.8613.7215.7117.840.000.100.280.490.670.810.951.071.161.2316005.547.339.0510.7012.5914.5116.561&700.000.110.310.550.740.901.051.191.291.3718005.957.899.7411.5013.4915.4717.5219.560.000.130.350.610.841.011.191.331.451.54303520006.318.3810.3412.1814.2116.1918.1720.000.000.140.390.680.931.121.321.481.621.7122006.62&8010.8312.7214.7616.681&4819.970.000.160.430.751.021.241.451.631.781.8824006.869.1311.2113.1115.1016.8