Problem 14 The backstop shown schematically in the figure is used to prevent backward rotation of the shaft. A sector is pivoted at 0,and one end of the band is attached to it and operates at a radius r2 =57 mm. The other end of the bend is attached at point a so that Oa =r125 mm. The diameter of the wheel is 210 mm, the angle of Wrap is 270°,and the width of the band is 54 mm. The torque on the wheel is 400 N.m. Assuming a coefficient of friction between the band and wheel equal to 0.2, determine the following: (a) the maximum band tension; (6) the maximum pressure between the band and wheel; and (c) whether the backstop is self-locking. Locking

Problem 14 The backstop shown schematically in the figure is used to prevent backward rotation of the shaft. A sector is pivoted at 0,and one end of the band is attached to it and operates at a radius r2 =57 mm. The other end of the bend is attached at point a so that Oa =r125 mm. The diameter of the wheel is 210 mm, the angle of Wrap is 270°,and the width of the band is 54 mm. The torque on the wheel is 400 N.m. Assuming a coefficient of friction between the band and wheel equal to 0.2, determine the following: (a) the maximum band tension; (6) the maximum pressure between the band and wheel; and (c) whether the backstop is self-locking. Locking

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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Slope and Deflection

The slope in a deflected beam is described as an angle in radians made by the tangent of the section with the original axis of the beam. The deflection at any point on the axis of the beam is defined as the lateral displacement of the point before and after loading.

Question

Problem 14
The backstop shown schematically in the figure is
used to prevent backward rotation of the shaft. A
sector is pivoted at 0,and one end of the band is
attached to it and operates at a radius r2 =57 mm.
The other end of the bend is attached at point a so
that Oa =r1= 25 mm. The diameter of the wheel is
210 mm, the angle of Wrap is 270°, and the width of
the band is 54 mm. The torque on the wheel is 400
N.m. Assuming a coefficient of friction between the
band and wheel equal to 0.2, determine the
following:
(a) the maximum band tension; (6) the maximum
pressure between the band and wheel; and (c)
whether the backstop is self-locking.
Locking
O

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