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Question 1 A reverted gear train with a speed ratio of 12 consists of four gear wheels. Gear A has a module pitch of 3 mm and is meshed with gear B. Whereas gear C that is meshed with gear D has a module pitch of 2.5 mm. Gear B and C form a compound gear system. The distance between axis of rotation of driving gear A and driven gear B is equal to 200 mm. If gear A has 24 teeth, determine the suitable number of teeth for all gears.

Question 1 A reverted gear train with a speed ratio of 12 consists of four gear wheels. Gear A has a module pitch of 3 mm and is meshed with gear B. Whereas gear C that is meshed with gear D has a module pitch of 2.5 mm. Gear B and C form a compound gear system. The distance between axis of rotation of driving gear A and driven gear B is equal to 200 mm. If gear A has 24 teeth, determine the suitable number of teeth for all gears.

Elements Of Electromagnetics
Elements Of Electromagnetics
7th Edition
ISBN:9780190698614
Author:Sadiku, Matthew N. O.
Publisher:Sadiku, Matthew N. O.
ChapterMA: Math Assessment
Section: Chapter Questions
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» Question 1 A reverted gear train with a speed ratio of 12 consists of four gear wheels. Gear A has a module pitch of 3 mm and is meshed with gear B. Whereas gear C that is meshed with gear D has a module pitch of 2.5 mm. Gear B and C form a compound gear system. The distance between axis of rotation of driving gear A and driven gear B is equal to 200 mm. If gear A has 24 teeth, determine the suitable number of teeth for all gears. Question 2 A Porter governor has a minimum speed of 134 rpm and a range of speed of 21 rpm. All four arms of the governor are equal in length, and each is equal to 250 m. The ball mass and the central mass loaded on the sleeve are 5 kg and 15 kg, respectively. Calculate the angle between the two upper arms of the governor when the governor starts to lift and when the governor is at maximum. Question 3 A crank shaft of an engine shown in Figure 1 is connected to a flywheel and have a mean speed of 200 rpm. The angle 0 represents the movement of the crack from inner dead centre. The resisting torque for the engine is constant and the turning moment curve is represented by equation 1. If the total fluctuation of speed is equal to 1% of the engine mean speed, calculate the mass moment of inertial of the flywheel. T = (20 + 95 sin 20 - 57 cos 20) Nm (1) W B G tutt Figure 1: An engine
Transcribed Image Text:» Question 1 A reverted gear train with a speed ratio of 12 consists of four gear wheels. Gear A has a module pitch of 3 mm and is meshed with gear B. Whereas gear C that is meshed with gear D has a module pitch of 2.5 mm. Gear B and C form a compound gear system. The distance between axis of rotation of driving gear A and driven gear B is equal to 200 mm. If gear A has 24 teeth, determine the suitable number of teeth for all gears. Question 2 A Porter governor has a minimum speed of 134 rpm and a range of speed of 21 rpm. All four arms of the governor are equal in length, and each is equal to 250 m. The ball mass and the central mass loaded on the sleeve are 5 kg and 15 kg, respectively. Calculate the angle between the two upper arms of the governor when the governor starts to lift and when the governor is at maximum. Question 3 A crank shaft of an engine shown in Figure 1 is connected to a flywheel and have a mean speed of 200 rpm. The angle 0 represents the movement of the crack from inner dead centre. The resisting torque for the engine is constant and the turning moment curve is represented by equation 1. If the total fluctuation of speed is equal to 1% of the engine mean speed, calculate the mass moment of inertial of the flywheel. T = (20 + 95 sin 20 - 57 cos 20) Nm (1) W B G tutt Figure 1: An engine
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