The gearbox shown below is connected at one side to an axis moved by a motor. This motor produces a torque of 5 kN.m and rotates with an angular velocity of 40 rpm. The other axis produces a torque of 1 kN.m. How much heat rate is the gearbox dissipating? Q = ? T= 5 kN.m 2, = 40 rpm D = 20 cm T2 = 1 kN.m 2, = ? D = 5 cm %3D
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gearbox = Caja de Engranes
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- A truck and trailer must be able to accelerate at 0.3 m/s2 up an incline of 1 in 20. The truck’s engine generates a torque of 900Nm. It has a moment of inertia of 30kg.m2 . The efficiency of the truck’s transmission is 83%. The mass of the truck is 12 tons, and that of the trailer is 9tons. The tractive resistance for both the truck and the trailer combined is 60N/ton. The truck has 12 wheels and the trailer has 8 wheels. The wheels on both vehicles are identical. Each wheel has a diameter of 1.2m, a mass of 75kg and a radius of gyration of 500mm. Determine two suitable overall gear ratios.Flat Belts. Two shafts 10 ft apart, with axes in the same horizontal plane, are to be connected with a flat belt in which the driving pulley, powered by an electrical motor with a 25 hp rating at 900 rev/min, drives the second shaft at half its angular speed. The driven shaft drives uniform (smooth) machinery loads. Select a flat belt.An engine of a motor vehicle with a wheel diameter of 712 mm develops 50 kW at 2,000 rpm combined efficiencyof the differential and transmission is 75% with an over-all speed reduction to. 1 determine he torque to bedelivered by the clutch N-m.
- A 5 hp motor with a speed of 900 rpm is used to drive an industrial fan with a velocity of 5.72m/s. The center distance between the sprockets is 1.5 times the diameter of driven sprocket andis equal to 630 mm. Determine the length of chain in pitches. Use RC 40 chain and service factorof 1.3.Prob # 8. If the inertia is 80 lb-ft2, and the speed of the driven shaft is to be increased from 0 to 1500 rpm in 3 seconds. Calculate the heat generated for each engagement if clutch starting torque is 10 in-lb. a. 20.50 Btu b. 41.50 Btu c. 30.50 Btu d. 51.50 BtuFalcon company Nizwa is conducting a campus interview to you. You are asked to design the propeller shaft with the following specification. (i) Power transmission =60 kW,(ii) Shaft speed = 160 rpm,(iii)The angle of twist / m length = 1.1º(iv)Maximum twisting moment is 30% greater than its mean. (v) Take Modulus of rigidity as 105 Gpa. (i) Mean torque of the shaft (unit in Nm) = (ii)Maximum torque of shaft (unit in Nm) = (iii) The diameter of the shaft (unit in mm) = iv) Maximum shear stress in the shaft (Unit in MPa) is
- An electric motor has a rotor with a mass moment of inertia of 22 ft-lb-s2. What torque is required to accelerate it from rest to 1,174 rpm in 3.6 seconds? Provide your answer in lb-ft and round to the nearest whole number. An electric motor has a rotor with a mass moment of inertia of 22 ft-lb-s2. What torque is required to accelerate it from rest to 1,174 rpm in 3.6 seconds? Provide your answer in lb-ft and round to the nearest whole number.The turning moment diagram for a multi cylinder engine has been drawn toa scale of 1 mm = 4500 N -m vertically and 1 mm = 2. 4 ͦ horizontally. Theintercepted areas between output torque curve and mean resistance lineabove and below the mean taken in order from one end are 342, 23, 245,303, 115, 232, 227, 164 ??2, when the engine is running at 150 rpm. Ifthe mass of the flywheel is 1000 kg and the total fluctuation of speed doesnot exceed 3% of the mean speed, find the minimum value of the radius ofgyration.power (N)=9.9kw Input speed (n1)=2350rpm Distance between centers (a)=168mm Total distance between Ave B bearings=440mm module(m)=3mm question 3 Calculate the power on the output shaft since there is 3% loss in gears in gearboxes, rolling bearings in support bearings (2% loss in a pair of bearings) and sealing element spring seal (4% loss in a pair of sealing elements).
- As seen in the figure, a construction machine is rotated by a drive mechanism consisting of belt-pulley and spur gear mechanisms. Engine power P = 5.5 kW ; engine shaft speednm = 1500 rpm ; drive pulley diameter Dt = 16 cm ; diameter of the opposite pulley Dk = 55 cm ; number of pinion teeth z1 = 21 ; number of teeth of the counter gearz2 = 60 ; pulley mechanism efficiency ηk = 0.95 ; Since the efficiency of the gear mechanism is ηd = 0.97: a) Find the output shaft speed nç and the torque Mç on this shaft.b) The force on the taut arm of the belt S1 = 450 N;coefficient of friction μ = 0.3 ; If the winding angle α = 160⁰, is the frictionally transmitted moment Ms sufficient to compensate for the Mg moment on the input shaft? Calculate.Suppose an automobile engine can produce 195 N⋅m of torque, and assume this car is suspended so that the wheels can turn freely. Each wheel acts like a 14 kg disk that has a 0.195 m radius. The tires act like 2.15-kg rings that have inside radii of 0.18 m and outside radii of 0.34 m. The tread of each tire acts like a 8.5-kg hoop of radius 0.335 m. The 16-kg axle acts like a solid cylinder that has a 1.75-cm radius. The 29.5-kg drive shaft acts like a solid cylinder that has a 3.25-cm radius. Calculate the angular acceleration, in radians per squared second, produced by the motor if 95.0% of this torque is applied to the drive shaft, axle, and rear wheels of a car.For a 90° V-twin engine system, having two identical cylinder with center line of each cylinder being inclined at 45° to vertical, the speed is 2400 rpm. The reciprocuting mass per cylinder - 1.5 kg stroke=14 cm length of connecting rod -28 cm. Find the values of max. primary and secondary Forces and indicate whether the same the can be balanced by suitable means.