皮帶輪傳動計算方法

皮帶輪傳動計算方法已知：機外靜壓值Pst；風量Q；機組壓損AP；所選風機型號求：機組皮帶輪型號，皮帶型號解：1.求全壓P01） 根據(jù)風機性能曲線與風量值定出動壓值Pd（定風機型號時，注意風量Q值對應的出口風速在10?15m/s為好）2） 機組壓損厶P計算蒸發(fā)器：△P1過濾網(wǎng)：△P2輔助電加熱部件：△P3其它：△P4=30Pa3）P=P+P+AP0std2.求風機內功率Nin0；風機轉速n2根據(jù)全壓值與風量值查找風機性能曲線，找其交點，定風機內功率值Nin0與風機轉速n2；對于雙風機，風機性能見下：風量： 曲線圖上值X2轉速： 曲線圖上值X1.05內功率： 曲線圖上值X2.15噪聲： 曲線圖上值+3dB（A）3?選用電機功率P1） 求風機軸功率NSNS=Nin0/nm(nm=0?95)nm—風機機械效率風機傳動方式nm電機直聯(lián)傳動1聯(lián)軸器直聯(lián)傳動0.98三角皮帶傳動0.952）求配套電機的功率NN=NSXK（K值選取見下）K——電機容量安全系數(shù)電機功率(Kw)k值W2.21.2W111.15>111.1計算功率Pc=KaXN(Ka為工作情況系數(shù)，我們一般取1.0)根據(jù)PC值選取電機型號，定電機功率P求傳動比I1)根據(jù)電機選型手冊定電機轉速n1i=n1/n2定電機皮帶輪d](皮帶輪型號一般選取SPA)原則1：電機皮帶輪不要過小;一般$100原因：小帶輪直徑決定了帶的彎曲程度，小帶輪越小，皮帶彎曲越厲害；同時小帶輪越小，則帶速偏低，由于P=FV，則F偏大，對帶的壽命影響較大。原則2：根據(jù)傳動比計算出的大帶輪不要過大；一般W1/2倍葉輪直徑原因：風機皮帶輪過大將造成機組進風阻力較大，影響機組性能原則3：帶速v=ndp/60*1000WV11max對窄V帶，V=35?40,為了充分發(fā)揮窄V帶的傳動動力，應max使v~20m/s定風機皮帶輪d2d2=d1Xi定中心距a范圍中心距的大小決定了帶長，帶長越長，帶在單位時間內受彎曲的次數(shù)越少，一般建議中心距范圍：0.7d1+d2)<a<2d1+d2)另根據(jù)機組結構定中心距范圍，與上面的范圍取值8?定皮帶長度L方法1：直接在三維圖上量取皮帶的近似長度，然后根據(jù)該近似長度來確定標準帶長方法2：根據(jù)公式Ld0=2a0+n(d]+d2)/2+(d1-d2)2/4a°

其中a0為處于中心距范圍內的自定的中心距9?定皮帶數(shù)量z1） 根據(jù)電機皮帶輪型號與電機轉速根據(jù)機械手冊定查取單根皮帶所能傳遞的功率P1;（見下表）2） 根據(jù)電機皮帶輪型號與電機轉速與傳動比根據(jù)機械手冊定查取傳動比的額定功率增量厶P］；（見下表）3） 根據(jù)z=P/（P1+AP］）KaKL（其中Ka為小帶輪包角修正系數(shù)，KL為帶長修正系數(shù)）（我們在具體計算時經常忽略KKt等參數(shù)）a，L10.校核電機皮帶輪的包角aa=180°-(d2-d1)X57.3°$120°表15-91）SP遲型霍V帶的額定功率（摘自GB/T13575.1—1992）單根v帶的腥本額定功半PjAWrVl時額宦功率的增MiPj/kW小帶輪轉速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單根v帶的腥本額定功半PjAWrVl時額宦功率的增MiPj/kW小帶輪轉速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小帶輪的呈準宜徑^,/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帶的額定功率（摘自GB/T13575.1—1992）單根V帶的基本額定功率P^/kW 時額定功率的增量△Pt/kW小帶輪轉速刃1/r*min"1小帶輪的基準直徑ddi/mm傳動比i帶速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為常用轉速。表15-9jSPB型窄V帶的額定功率（摘自GB/T13575.1—1992）單根V帶的基本額定功率P,/kW iHl時額定功率的增*ZiP,/kW小帶輪轉速/r-min_l■小帶輪的基準直徑傳動比i帶速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