Q14:- An epicyclic gear train as shown in the Fig. below consists of two sun wheels (A) and (D) with 28 and 24 teeth respectively, engaged with a compound planet wheels (B) and (C) with 22 and 26 teeth respectively. The sun wheel D is keyed to the driven shaft and the sun wheel A is a fixed wheel co-axial with the driven shaft. The planet wheels are carried on an arm (E) from the driving shaft which is co- axial with the driven shaft. Find the velocity ratio of the gear train. If 1 hp is transmitted and the input speed being 100 rpm, determine the torque required to hold the sun wheel A stationary.

Q14:- An epicyclic gear train as shown in the Fig. below consists of two sun wheels (A) and (D) with 28 and 24 teeth respectively, engaged with a compound planet wheels (B) and (C) with 22 and 26 teeth respectively. The sun wheel D is keyed to the driven shaft and the sun wheel A is a fixed wheel co-axial with the driven shaft. The planet wheels are carried on an arm (E) from the driving shaft which is co- axial with the driven shaft. Find the velocity ratio of the gear train. If 1 hp is transmitted and the input speed being 100 rpm, determine the torque required to hold the sun wheel A stationary.

Elements Of Electromagnetics

7th Edition

ISBN:9780190698614

Author:Sadiku, Matthew N. O.

Publisher:Sadiku, Matthew N. O.

ChapterMA: Math Assessment

Section: Chapter Questions

Problem 1.1MA

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A simple gear train of 30 and 50 teeth for pinion and gear wheel respectively, is used to drive an electric wheelchair at a velocity that is double the maximum velocity of slip. The pinion has an equal addendum as the gear wheel, a module of 3 mm, and a pressure angle of 14.5°. The wheelchair has a maximum velocity of 5 m/s when its pinion rotates at 800 r.p.m. Calculate: 1.1. The magnitude of the velocity of slip of gears in mesh. 1.2. The angular speed of the gear wheel in rad/s.
A simple gear train of 30 and 50 teeth for pinion and gear wheel respectively, is used to drive an electric wheelchair at a velocity that is double the maximum velocity of slip. The pinion has an equal addendum as the gear wheel, a module of 3 mm, and a pressure angle of 14.5°. The wheelchair has a maximum velocity of 5 m/s when its pinion rotates at 800 r.p.m. Calculate: 1.5. The addendum of the gears in mm. 1.6. The contact ratio.
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