Question
Your company needs a spur gearset for speed reduction from input of 3750 to output of 1500 rpm. T…
Your company needs a spur gearset for speed reduction from input of 3750 to output of 1500 rpm. The motion input comes from a single cylinder engine, with the peak torque of 234 lb-in. Your lab already has a 20 teeth, 4-in pitch diameter, 20o pressure angle gear that you wish to use as a pinion. Your lab assistant determined that , and Jg are 0.34 and 0.4, Kv 0.8, Km = 1.6, Ks -KB 1. For contact stress calculation, he found that I-0.1 Both pinion and gear will be through hardened steel. Your lab assistant already corrected the bending and contact strengths; these are 29167 psi and 93543 psi respectively Determine all the parameters for this gearset and the safety factors for bending and contact
Your company needs a spur gearset for speed reduction from input of 3750 to output of 1500 rpm. The motion input comes from a single cylinder engine, with the peak torque of 234 lb-in. Your lab already has a 20 teeth, 4-in pitch diameter, 20o pressure angle gear that you wish to use as a pinion. Your lab assistant determined that , and Jg are 0.34 and 0.4, Kv 0.8, Km = 1.6, Ks -KB 1. For contact stress calculation, he found that I-0.1 Both pinion and gear will be through hardened steel. Your lab assistant already corrected the bending and contact strengths; these are 29167 psi and 93543 psi respectively Determine all the parameters for this gearset and the safety factors for bending and contact
Solutions
Expert Solution
wwwCHE 66 com SOLUTION Pack engine tor џе-234 ld-in. Phion20 Teth 4-n pitch diameterd 20 pressur angle 0.3408 (Dnomie Faor OMIC Rim-lhicknosc factor sige factor Material : .Hardened 14167 pstCovneced. Fd all parcsffactons for bendin and coroc Slly covrected barding shengt Sfcorted t sthen Sale COY ending stress (o
JT whee, w- tangetial ransmiel load, lbf nSmitte Koover bad faetor kv = dyramic factor k, = size fac or ransverse diame F fe wi of the narrower member, in rans verse me tbMn. Cp= elastic co a乐cient, Csurface canditian faetor di diam pinonh where, -Surtace georR
fati。 さY on, Pinlan 12. А Torque (b.in. ) x NP (n hp 234 x 375O 63025 На 13-92 hp 3926.99
shok pauar sour) and moderate shock (drisen machine k- .5o .P 9.532 |21 IO, 92 pst
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