A shock-free coupling for a low-power mechanical drive is to be made from a pair of concentric cylinders. The annular space between the cylinders is to be filled with oil. The drive must transmit power, ? = 10 W. Other dimensions and properties are as shown. Neglect any bearing friction and end effects. Assume the minimum practical gap clearance δ for the device is δ = 0.25 mm. Determine the viscosity that should be specified to satisfy the requirement for this device.
A shock-free coupling for a low-power mechanical drive is to be made from a pair of concentric cylinders. The annular space between the cylinders is to be filled with oil. The drive must transmit power, ? = 10 W. Other dimensions and properties are as shown. Neglect any bearing friction and end effects. Assume the minimum practical gap clearance δ for the device is δ = 0.25 mm. Determine the viscosity that should be specified to satisfy the requirement for this device.
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 shock-free coupling for a low-power
Transcribed Image Text:A shock-free coupling for a low-power mechanical drive is to be made from a pair of concentric
cylinders. The annular space between the cylinders is to be filled with oil. The drive must transmit
power, P = 10 W. Other dimensions and properties are as shown. Neglect any bearing friction and
end effects. Assume the minimum practical gap clearance & for the device is 8 = 0.25 mm.
Determine the viscosity that should be specified to satisfy the requirement for this device.
P = 10 W
L = 20 mm
R = 10 mm
w2 2 9,000 rpm
(outer cylinder)
w1 = 10,000 rpm
- 8 = Gap clearance
2.02 N.s/m²
3.45 N. s/m²
0.54 N.s/m²
1.63 N.s/m²
A
В
C
D
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