100%(3)3 out of 3 people found this document helpful
This preview shows page 2 - 3 out of 3 pages.
2.1.5Exercise 1:A.Gear Specification/Part numberGear Type# of teethPitch DiameterDiametral PitchGear Ratio for the pairH2472Spur723 in241.333H2496Spur964 in241.333L112YMiter241-1/2 in n/a1L112YMiter241-1/2 in n/a1H1616RHelical161 in in n/a2H1632LHelical322 in n/a2Gear Pair 1SpeedN1N2Actual Velocity ratioTheoretical Velocity ratio43.4220.127.116.1161.618.104.22.16881.222.214.171.124Gear Pair 2SpeedN3N4Actual Velocity ratioTheoretical Velocity ratio44.724.721162.192.191181.51.511Gear Pair 3Speed N5N6Actual Velocity ratioTheoretical Velocity ratio44.7126.96.36.199188.8.131.52.5081.53.16.47.50B. 1. SF= 1.252. RPM of driver/ RPM of driven= 1750/47= 37.23:1
3. 47*1.24= 58.28= 30.02:14. NT= AT*SF= 2000/1.25= 1600 in/lbs5. 2000 in/lbs6.Style B Basic Reducer 72 lbs7. yes, Style B Basic Reducer with fan8. Motor HP= AT*Thermal Input H.P./Thermal Output Torque= (1600*2.73)/2415= 1.81 H.PPost Lab Exercise: 1.Worm gear, Helical gear, Cycloidal Disc2.Application, Hours of operation, bore dimensions, mounting position, output speed, motor horsepower3.Use mating rollers4.Quieter, high speed reduction, low vibration, high efficiency5.A single reduction speed reducer that operates on only a cylindrical worm with screw thread, and a worm or worm wheel. It is so quiet because logistically it has perpendicular non-intersecting shafts.6.Because even though they have the same ratio, the worm gear reduces typically only has efficiency of 60%