皮带机输送能力电机功率计算

皮带机电机功率计算,,,,,,,,,,表1,,,,,,,,,

目前在设计中，除了在较长的输送机中利用逐点法计算其功率外，常采用简易计算法。此法考虑到了实际使用中的许多因素，其计算结果与实际情况接近。,,,,,,,,,,工作环境,,,,清洁、干燥,,少量灰尘、正常湿度,,大量灰尘、湿度偏高,

,,,,,,,,,,"托辊阻力系数

（滚动轴承）",,,,平型,槽型,平型,槽型,平型,槽型

"（1）驱动滚筒轴功率（kW）的计算

N轴=[K1LV+K2QL+ξ*(0.00273QH)]K3K4+∑N

式中，K1LV-输送机空载运行功率（kW)；

K2QL-水平输送物料的功率（kW)；

0.00273QH-垂直提升物料的功率（kW)，向上输送取（+）号，向下输送取（-）号；

",,,,,,,,,,,,,,0.018,0.02,0.025,0.03,0.035,0.04

,,,,,,,,,,K1,"带宽B

（mm)",300,,0.0035,0.004,0.005,0.006,0.007,0.008

,,,,,,,,,,,,400,,0.0048,0.0053,0.0066,0.008,0.0095,0.0106

,,,,,,,,,,,,500,,0.0061,0.0067,0.0034,0.01,0.0117,0.0136

,,,,,,,,,,,,650,,0.0074,0.0082,0.0103,0.0124,0.0144,0.0165

,,,,,,,,,,,,800,,0.01,0.011,0.0137,0.0165,0.0192,0.022

,,,,,,,,,,,,1000,,0.0138,0.0153,0.0191,0.0229,0.0268,0.0306

符号,意义,,,,,,,单位,数据,,,1200,,0.0191,0.0212,0.0265,0.0318,0.0371,0.0424

K1,输送机空载运行的功率系数，与带宽和托辊的阻力系数有关，见表1,,,,,,,,0.0061,,,1400,,0.023,0.0255,0.0313,0.0383,0.0466,0.051

L,输送机水平投影长度,,,,,,,m,4.3,K2,,,,4.91×10-5,5.45×10-5,6.82×10-5,8.17×10-5,9.55×10-5,10.89×10-5

V,输送带线速度,,,,,,,m/s,0.35,,,,,,,,,,

K2,物料水平输送的功率系数，与托辊阻力系数有关，见表1,,,,,,,,0.0000491,表2,,,,,,,,,

Q,物料的输送量,,,,,,,t/h,1.5,输送机水平投影长度L（m),,,≤15,15～30,30～45,＞45,,,

H,倾斜输送时的物料垂直提升高度(若用卸料小车，则应包括它使物料提升的高度）,,,,,,,m,2.5,K3,,,1.25,1.12,1.05,1.02,,,

K3,与输送机水平投影长度有关的系数，见表2,,,,,,,,1.25,,,,,,,,,,

K4,与输送机布置形式有关的系数，见表3,,,,,,,,1,表3,,,,,,,,,

ξ,向上输送物料时，ξ=1，向下输送物料时，ξ=-1,,,,,,,,1,输送机布置形式,,直线或凹弧转向,,凸弧转向,,,尾部传动,有垂直张紧装置,

∑N,卸料装置、清扫器等的附加功率。∑N=N1+N2+N3+N4+N5,,,,,,,kW,0,,,,,近头部,中间,近尾部,,,

,,,,,,结论：,N轴,kW,0.024668369,K4,,1,,1.06,1.04,1.06,1.08,1.06,

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"单侧梨式卸料器：

N1=（0.11QB）*χ（kW)注意：若由式计算得到的功率小于0.4kW，则取0.4kW。",,,,,,,,,,,,,,,,,,,

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符号,意义,,,,,,,单位,数据,,,,,,,,,,

Q,物料的输送量,,,,,,,t/h,120,,,,,,,,,,

B,带宽,,,,,,,m,0.6,,,,,,,,,,

χ,是否有这项附加功率，有χ=1，无χ=0,,,,,,,,0,,,,,,,,,,

,,,,,,结论：,N1,kW,0,,,,,,,,,,

"双侧梨式卸料器：

N2=（0.0075QB）*χ（kW)注意：若由式计算得到的功率小于0.4kW，则取0.4kW。",,,,,,,,,,,,,,,,,,,

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符号,意义,,,,,,,单位,数据,,,,,,,,,,

Q,物料的输送量,,,,,,,t/h,300,,,,,,,,,,

B,带宽,,,,,,,m,1,,,,,,,,,,

χ,是否有这项附加功率，有χ=1，无χ=0,,,,,,,,0,,,,,,,,,,

,,,,,,结论：,N2,kW,0,,,,,,,,,,

"靠人工或电机驱动的卸料小车：

N3=（0.225N0+0.005Q）*χ（kW)",,,,,,,,,,,,,,,,,,,

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符号,意义,,,,,,,单位,数据,,,,,,,,,,

N0,未计∑N时，驱动滚筒的轴功率（kW),,,,,,,（kW),0.499385,,,,,,,,,,

Q,物料的输送量,,,,,,,t/h,300,,,,,,,,,,

χ,是否有这项附加功率，有χ=1，无χ=0,,,,,,,,0,,,,,,,,,,

,,,,,,结论：,N3,kW,0,,,,,,,,,,

"靠摩擦轮驱动的卸料小车：

N4=（0.275N0+0.005Q+0.4）*χ（kW)",,,,,,,,,,,,,,,,,,,

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符号,意义,,,,,,,单位,数据,,,,,,,,,,

N0,未计∑N时，驱动滚筒的轴功率（kW),,,,,,,（kW),0.499385,,,,,,,,,,

Q,物料的输送量,,,,,,,t/h,300,,,,,,,,,,

χ,是否有这项附加功率，有χ=1，无χ=0,,,,,,,,0,,,,,,,,,,

,,,,,,结论：,N4,kW,0,,,,,,,,,,

"清扫器或导料挡板：

N5=（K5V）*χ（kW)",,,,,,,,,,,,,,,,,,,

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符号,意义,,,,,,,单位,数据,表4系数K5值,,,,,,,,,

K5,清扫器、导料挡板的功率系数，见表4,,,,,,,,0.37,带宽B（mm),,500,650,800,1000,1200,1400,,

V,输送带线速度,,,,,,,m/s,1,弹簧清扫器,,0.75,0.75,0.75,1.5,1.5,1.5,,

χ,是否有这项附加功率，有χ=1，无χ=0,,,,,,,,0,空段清扫器,,0.1,0.15,0.16,0.2,0.23,0.25,,

,,,,,,结论：,N5,kW,0,导料挡板,,0.37,0.67,1,1.57,2.25,3,,

"（2）电动机功率（kW）的计算：

N电=K*N轴/η

式中，N轴-驱动滚筒轴功率（kW）；

K-功率安全系数和满载启动系数，取K=1.2～1.4；

η-总传动效率，通常取0.8～0.9，采用减速箱传动时，对光面滚筒取η=0.88，对胶面滚筒取η=0.9.

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符号,意义,,,,,,,单位,数据,,,,,,,,,,

N轴,驱动滚筒轴功率，见单元格（J22）,,,,,,,kW,0.024668369,,,,,,,,,,

K,功率安全系数和满载启动系数，取K=1.2～1.4,,,,,,,,1.4,,,,,,,,,,

η,总传动效率,,,,,,,,0.8,,,,,,,,,,

,,,,,,结论：,N电,kW,0.043169645,,,,,,,,,,

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