exam 2 formula sheet - Belt Drives =F\/G Te=T1-T2 Chain Drives Theoretical velocity ratio= of teet h driven of teet h driver T1:tight T2:slack Bb 2 tan\/2

# exam 2 formula sheet - Belt Drives =F/G Te=T1-T2 Chain...

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Belt DrivesChain DrivesGearsμ=F/GTe=T1-T2T1:tight T2:slackPb=Bb2 tanα/2Pb=Pitch diameter variationBb=belt top thicknessHb=belt thicknessα=sheave groove angleV=rw=radius2π n60n=rpm of pulleyDesign HP=rated HP X service factorCorrected HP=HP per belt X “F” factor X number of beltsActual speed ratio= rpm1rpm2=D2D1(observation)Theoretical speed ratio=D2D1=r2r1D=diameterOverall TSR=TSR1x TSR2x TSRnInput HP=Torque x RPM63000lb-inHP= Torque x RPM5252lb-ftTorque= 63025x HPNin-lbTorque Ratio= T2T1= N1N2(inverseof speed ratio)Overall ASR= Dfirst/DlastTheoretical velocity ratio=¿of teet hdriven¿of teet hdriverActual velocity ratio= Driver speeddrivenspeedL=2C + N+n2+ (Nn)24πCC=LN+n2+√ L(N+n)228(Nn)24π24L=length of chain in pitchesC=center distance in pitchesN=number of teeth in large sprocketn=number of teeth in small sprocketDesign HP= HP x SFL= # of links x pitchTheoretical V. R.=¿of teethdriven  • • • 