Q5: The block brake, as shown, provides a braking torque of 360 Nm The diameter of the brake drum is 300 mm. The coefficient of friction is 0.3. Find: 1. the force (P) to be applied at the end of the lever for the clockwise and counter clockwise rotation of the brake drum, and 2. The location of the pivot or fulcrum to make the brake self-locking for the clockwise rotation of the brake dran 100 ( 4 μ sin 8 20+ sin20 T> (F₁) r Bearing Area A, b(2r sind) RN = (1 Brake drum

Q5: The block brake, as shown, provides a braking torque of 360 Nm The diameter of the brake drum is 300 mm. The coefficient of friction is 0.3. Find: 1. the force (P) to be applied at the end of the lever for the clockwise and counter clockwise rotation of the brake drum, and 2. The location of the pivot or fulcrum to make the brake self-locking for the clockwise rotation of the brake dran 100 ( 4 μ sin 8 20+ sin20 T> (F₁) r Bearing Area A, b(2r sind) RN = (1 Brake drum

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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42. A block-brake shown below has a face width of 300 mm and a mean co-efficient of friction of 0.25. For an activating force of 400 N, the braking torque in Nm is 200 mm 400 mm - 400 N 300 mm 45° - 150 mm -
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5 The forces F, and F, in a brake band and the direction of rotation of the drum are as shown in the figure. The coefficient of friction is 0.25. The angle of wrap is 3Tt/2 radians. It is given that R = 1 m and F, = 1 N. The torque (in Nm) %3D %3D exerted on the drum is F2 F,
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A caliper brake is required for the front wheels of a sports car with a braking capacity of 820N m for each brake. Preliminary design estimates have set the brake geometry as , = 100 mm, r, = 160 mm and 0 = 45°. A pad with a coefficient of friction of 0.35 has been selected. Deterrmine the required actuating force and the average and maximum contact pressures.
D B (2 100N AB=10 cm CB=BD=4 cm AF=2cm In the mechanism shown above, the friction coefficient of the sliding limb is given as 0.3. A horizontal force of 100 N is applied from the F point. Calculate the torque required for the AB crank handle to start SYT (Counter Clockwise) motion.
A multiple disc clutch is used to operate the speed regulating gears of lathe. If the torque delivered by the clutch is 400 lbs.in , evaluate the number of discs are necessary and the max. force acting on them while the clutch is in operation. Limit the disc friction surface sizes between 5 in. and 3 in. Take the factor of safety as 2 , coefficient of friction varies from 0.150 to 0.200, and the pressure as (100-6/100)psi.
QUESTION 2 BRAKES A calliper brake is required for the front wheels of a van with a braking capacity of 900 Nm for each brake. Preliminary design estimates have set the brake geometry as n=100 mm, fo=160 mm and 8-45". A pad with a coefficient of friction of 0,3 has been selected. Determine: 2.1 the required actuating forces, 2.2 the average and maximum contact pressures.
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