22_ch 17 Mechanical Design budynas_SM_ch17

22_ch 17 Mechanical Design budynas_SM_ch17 -...

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Chapter 17 441 Parameter Four A-90 Belts Two A-120 Belts m G 7.33 7.142 K s 1.1 1.1 n d 1.1 1.1 K 1 0.877 0.869 K 2 1.05 1.15 d ,in 3.0 4.2 D 22 30 θ d , rad 2.333 2.287 V , ft/min 1350.9 1891 exp( f θ d ) 3.304 3.2266 L p 91.3 101.3 C 24.1 31 H tab , uncorr. 0.783 1.662 N b H tab , uncorr. 3.13 3.326 T a , lbf · in 26.45(105.8) 60.87(121.7) ± F a , lbf 17.6(70.4) 29.0(58) H a ,hp 0.721(2.88) 1.667(3.33) n fs 1.192 1.372 F 1 , lbf 26.28(105.2) 44(88) F 2 , lbf 8.67(34.7) 15(30) ( F b ) 1 , lbf 73.3(293.2) 52.4(109.8) ( F b ) 2 , lbf 10(40) 7.33(14.7) F c , lbf 1.024 2.0 F i , lbf 16.45(65.8) 27.5(55) T 1 , lbf · in 99.2 96.4 T 2 , lbf · in 36.3 57.4 N ± , passes 1 . 61(10 9 )2 . 3(10 9 ) t > h 93 869 89 080 Conclusions: • Smaller sheaves lead to more belts. • Larger sheaves lead to larger
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This note was uploaded on 12/13/2011 for the course EML 3013 taught by Professor Shingley during the Fall '11 term at UNF.

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