The Gearbox shown in Figure is connected to a Motor M rotating at 3200 rpm. The...
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The Gearbox shown in Figure is connected to a Motor M rotating at 3200 rpm. The system is used to transmit power to two mechanical loads: Load 1 requiring (10-0.6*(L+S)) kW connected to the output shaft by mean of the gear pair z5-z6; Load 2 requiring (4.5+1.5*L) kW connected to the intermediate shaft by mean of the gear pair z2-27. L = Last number of the student ID number (Example 123456 -> L=6) S = Second-last number of the student ID number (Example 123456-> S=5) Motor XA ● Tm Wm ● Load 2 ● Z1 Z2 K₁- A Z7 a b Z4. AB The Gears have the following data (assume a pressure angle of 20°): Gear 1- Type: Spur, z1-21, m-3 mm, Face Width=28 mm z2=71 Gear 2- Type: Spur, Gear 3- Type: Spur, z3=18, m-4 mm, Face Width=35 mm Gear 4- Type: Spur, z4=63 Gear 5- Type: Spur, z5=30, m-4 mm, Face Width=40 mm Gear 6- Type: Spur, z6=30 Gear 7- Type: Spur, z7=30 The geometrical dimensions shown in the figure are the following: a = 40 mm; b = 60 mm; c = 50 mm. C A Z3 Z6 Intermediate shaft Diameters: db=25 mm d=32 mm, D=35 mm, notch radius r = 1 mm, Roughness Ra 1.6 µm. (0.8 μm on the bearings sections). Assume a width of the bearing of 15 mm. The intermediate shaft material has the following characteristics (o,-800 Mpa, o, 1200 Mpa, Op-1-600 MPa) It is requested to: Z5 Calculate the reaction forces on the supports of the intermediate shaft, on both planes z-x, z-y. Calculate the relevant values of Bending Moment and Torsional Moment. ● Calculate the nominal and effective stress values for the intermediate shaft, for most critical point. Calculate the safety coefficient for fatigue on the intermediate shaft. Load 1 NOTES: DO NOT FORGET to use L and S to obtain your specific values of data given in the text of the exercise • Use ONLY the direction of rotation proposed in figure for the motor (and consequently for each shaft) • Refer to each specific question below for the requested answers. • NOTE THAT GEAR 2 IS MESHING WITH TWO DIFFERENT GEARS IN SEPARATE POINTS Intermediate Shaft Layout db Z₂ I a סו ld A r Gear 1 Gear 2 Gear 7 D b B d C Z3 i db The Gearbox shown in Figure is connected to a Motor M rotating at 3200 rpm. The system is used to transmit power to two mechanical loads: Load 1 requiring (10-0.6*(L+S)) kW connected to the output shaft by mean of the gear pair z5-z6; Load 2 requiring (4.5+1.5*L) kW connected to the intermediate shaft by mean of the gear pair z2-27. L = Last number of the student ID number (Example 123456 -> L=6) S = Second-last number of the student ID number (Example 123456-> S=5) Motor XA ● Tm Wm ● Load 2 ● Z1 Z2 K₁- A Z7 a b Z4. AB The Gears have the following data (assume a pressure angle of 20°): Gear 1- Type: Spur, z1-21, m-3 mm, Face Width=28 mm z2=71 Gear 2- Type: Spur, Gear 3- Type: Spur, z3=18, m-4 mm, Face Width=35 mm Gear 4- Type: Spur, z4=63 Gear 5- Type: Spur, z5=30, m-4 mm, Face Width=40 mm Gear 6- Type: Spur, z6=30 Gear 7- Type: Spur, z7=30 The geometrical dimensions shown in the figure are the following: a = 40 mm; b = 60 mm; c = 50 mm. C A Z3 Z6 Intermediate shaft Diameters: db=25 mm d=32 mm, D=35 mm, notch radius r = 1 mm, Roughness Ra 1.6 µm. (0.8 μm on the bearings sections). Assume a width of the bearing of 15 mm. The intermediate shaft material has the following characteristics (o,-800 Mpa, o, 1200 Mpa, Op-1-600 MPa) It is requested to: Z5 Calculate the reaction forces on the supports of the intermediate shaft, on both planes z-x, z-y. Calculate the relevant values of Bending Moment and Torsional Moment. ● Calculate the nominal and effective stress values for the intermediate shaft, for most critical point. Calculate the safety coefficient for fatigue on the intermediate shaft. Load 1 NOTES: DO NOT FORGET to use L and S to obtain your specific values of data given in the text of the exercise • Use ONLY the direction of rotation proposed in figure for the motor (and consequently for each shaft) • Refer to each specific question below for the requested answers. • NOTE THAT GEAR 2 IS MESHING WITH TWO DIFFERENT GEARS IN SEPARATE POINTS Intermediate Shaft Layout db Z₂ I a סו ld A r Gear 1 Gear 2 Gear 7 D b B d C Z3 i db
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Related Book For
Financial Accounting
ISBN: 9781264229734
11th Edition
Authors: Robert Libby, Patricia Libby, Frank Hodge
Posted Date:
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