1.A compound train consists of six gears. The number of teeth on the gears are as follows :D E F50GearB CANo. of teeth:6040252430The gears B and C are on one shaft while the gears D and E are on another shaft. The gear A drives gearB. gear C drives gear Dand gear E drives gear F. If the gear A transmits 1.5 kW at 100r.p.m. and the geartrain has an efficiency of 80 per cent, find the torque on gear F.[Ans. 30.55 N-m)2.Two parallel shafts are to be connected by spur gearing. The approximate distance between the shaftsis 600 mm. If one shaft runs at 120 r.p.m. and the other at 360 r.p.m., find the number of teeth on eachwheel, if the module is 8 mm. Also determine the exact distance apart of the shafts.(Ans. 114, 38 ; 608 mm]In a reverted gear train, as shown in Fig. 13.32, two shafts A and B are2in the same straight line and are geared together through an interme-3.diate parallel shaft C. The gears connecting the shafts A and C have amodule of 2 mm and those connecting the shafts C and B have amodule of 4.5 mm. The speed of shaft A is to be about but greater than12 times the speed of shaft B, and the ratio at each reduction is same.Find suitable number of teeth for gears. The number of teeth of eachgear is to be a minimum but not less than 16. Also find the exactBAvelocity ratio and the distance of shaft C from A and B.[Ans. 36, 126, 16, 56; 12.25 ; 162 mm)Fig. 13.32

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1. A compound train consists of six gears. The number of teeth on the gears are as follows : A B E F Gear D No. of teeth: 40 50 25 30 24 60 The gears B and C are on one shaft while the gears D and E are on another shaft. The gear A drives gear B. gear C drives gear D and gear E drives gear F. If the gear A transmits 1.5 kW at 100 r.p.m. and the gear train has an efficiency of 80 per cent, find the torque on gear F. [Ans. 30.55 N-m]

1. A compound train consists of six gears. The number of teeth on the gears are as follows : A B E F Gear D No. of teeth: 40 50 25 30 24 60 The gears B and C are on one shaft while the gears D and E are on another shaft. The gear A drives gear B. gear C drives gear D and gear E drives gear F. If the gear A transmits 1.5 kW at 100 r.p.m. and the gear train has an efficiency of 80 per cent, find the torque on gear F. [Ans. 30.55 N-m]

Elements Of Electromagnetics

7th Edition

ISBN:9780190698614

Author:Sadiku, Matthew N. O.

Publisher:Sadiku, Matthew N. O.

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Concept explainers

Power Transmission Elements

It is defined as the energy transfer from one location to another location. The energy will start moving from the energy generation source to the energy applied position to obtain the work output. From this method, a large amount of electric energy moves from the power station to various electrical substations.

Question

1.
A compound train consists of six gears. The number of teeth on the gears are as follows :
D E F
50
Gear
B C
A
No. of teeth:
60
40
25
24
30
The gears B and C are on one shaft while the gears D and E are on another shaft. The gear A drives gear
B. gear C drives gear Dand gear E drives gear F. If the gear A transmits 1.5 kW at 100r.p.m. and the gear
train has an efficiency of 80 per cent, find the torque on gear F.
[Ans. 30.55 N-m)
2.
Two parallel shafts are to be connected by spur gearing. The approximate distance between the shafts
is 600 mm. If one shaft runs at 120 r.p.m. and the other at 360 r.p.m., find the number of teeth on each
wheel, if the module is 8 mm. Also determine the exact distance apart of the shafts.
(Ans. 114, 38 ; 608 mm]
In a reverted gear train, as shown in Fig. 13.32, two shafts A and B are
2
in the same straight line and are geared together through an interme-
3.
diate parallel shaft C. The gears connecting the shafts A and C have a
module of 2 mm and those connecting the shafts C and B have a
module of 4.5 mm. The speed of shaft A is to be about but greater than
12 times the speed of shaft B, and the ratio at each reduction is same.
Find suitable number of teeth for gears. The number of teeth of each
gear is to be a minimum but not less than 16. Also find the exact
B
A
velocity ratio and the distance of shaft C from A and B.
[Ans. 36, 126, 16, 56; 12.25 ; 162 mm)
Fig. 13.32

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