Solve full solution for given answer The brake shown in the following figure is applied by the spring and released by a hydrauliccylinder (Not Shown). Using "Short Shoe Drum Brake Theory" and a friction coefficient ofμ=0.45 between the brake shoes and the drum, find the spring force "Fs" needed toproduce a braking torque of Th = 1750 Nm and the magnitude of the force on the bearingssupporting the brake drum at its center (Assume the weight of the brake drum isnegligible.). The brake drum rotates in a clockwise direction. (Start by drawing "Free BodyDiagrams" of the brake drum, the left arm/brake shoe assembly, and the right arm/brakeshoe assembly. Be careful when assigning direction to the friction forces in the "Free BodyDiagrams".)500 mmnodon Spring400 mm300 mmde ono di S350 mmPartial Ans. Fs 5824 Newtons

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Answered: The brake shown in the following figure…

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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For the drum brake shown in the following figure, there is an inner rim diameter of 280 mm and dimension a = 90 mm. The shoes have a face width of 30 mm. The force exerted by the cylinder hydraulic is 1000 N and the average coefficient of friction is 0.3. Determine: a) The maximum pressure in each shoe; b) The braking torque; c) Reactions resulting from the pivot pin;
The block brake, as shown in the figure, provides a braking torque of 376 N-m. The diameter of the brake drum is 258 mm. The coefficient of friction is 0.3. Find: a. The force (P), in Newtons, to be applied at the end of the lever for the clockwise rotation of the brake drum b. The force (P), in Newtons, to be applied at the end of the lever for the counter clockwise rotation of the brake drum; and c. The location of the pivot or fulcrum, in mm, to make the brake self-locking for the clockwise rotation of the brake drum.
The width of the simple band brake shown in the figure is 30 mm. The coefficient of friction between the brake and the drum surface is 0.20. Determine the braking torque and thickness of the band if the tensile stress is not to exceed 65 N/mm2.
The figure shows an internal rim-type brake having an inside rim diameter of 11in and a dimension R of 3.5 in. The shoes have a face width of 1.25 in. Find the braking torque and the maximum pressure for each shoe if the actuating force is 205 Ibf, the drum rotation is counterclockwise, and f=0.32. The maximum pressure on the right-hand shoe parp is [ 16.99] @ psi. The maximum pressure on the left-hand shoe pa| H is [100.813 | @ psi. The torque on the right-hand shoe Tgis [ .056 | @ kipin. The torque on the left-hand shoe T is [ .332| @ kipin. Total braking torque Tiotal s [-3887] @ Kip-in.
A block brake with a torque of 250 N-m. Its drum rotates at 100 rpm. The length of the block (1) is twice its width (w). Assume, the coefficient of friction P is 0.35. Calculate: (1) the applied load (P) and the hinge-pin reaction (Rx ana Ry) for clockwise rotation of the drum; (2) the applied load and hinge-pin reaction for anticlockwise rotation of the drum; (3) the rate of heat generated during the braking action. (4) The dimensions of the block, if the intensity of pressure between the block and brake drum is 1 MPa. (5) Check whether the brake is self-locking.
A load of Ft = 700 N comes to the free wheel of a car. The coefficient of friction between road and tire is µT = 0.8. Wheel radius is twice the disc friction radius (Rt = 2 Rs), µ = 0.35 between pad and disc and allowable pressure p = 0.5 N/mm2 Determine the pad sizes and the hydraulic pressure that should be sent to the piston. Piston's diameter is d = 30 mm.
A differential band brake is shown in the figure. The diameter of the drum is 800 mm. The coefficient of friction between the band and the drum is 0.3 and the angle of embrace is 240°. When a force of 777 N is applied at the free end of the lever, find: a. The maximum force, in Newtons, in the band for the clockwise rotation of the drum b. The minimum force, in Newtons, in the band for the clockwise rotation of the drum c. The maximum force, in Newtons, in the band for the counter clockwise rotation of the drum d. The minimum force, in Newtons, in the band for the counter clockwise rotation of the drum e. The torque which can be applied by the brake, in N-m, for the clockwise rotation of the drum.
A ladder of length 2L and mass M is positioned on level ground leaning against a wall such that the angle between the ladder and the horizontal is @. The coefficient of static friction between the ladder and the wall and between the ladder and the ground is jistatic = 0.66. The centre of mass of the ladder is halfway along it. For the ladder to be in mechanical equilibrium: Consider torques about the centre of the ladder. In which direction (into or out of the page) does the torque due to each of the 5 forces force act?Write down an equation for the sum of the torques about the centre or mass of the ladder and then use your equation for the torques to derive an expression for tan o in terms of the magnitudes of the forces acting
Q 3. The brake shown in the figure uses a band that has a coefficient of friction equivalent to rigid molded asbestos (dry) and is to operate using a maximum force F of 400 N. If the band width is 50 mm, find the band tensions and the braking torque.
In a pulley brake with inside shoes with an inner rim diameter of 300 mm given in the figure,R= 150 mm, shoe width 37.5 mm. The value of the force F applied on the shoes isIt is 2 kN. If the average friction coefficient is taken as 0.28;a) Max. what is the value of the pressure?b) Find the braking and normal torques and the total torque at each shoe.c) What are the values of the reaction forces on the right shoe knuckle pin?Note: Max. Take the angle (theta) at which the pressure “pa” occurs as 90 degrees.
A single block brake is shown in the figure. The diameter of the drum is 250 mm and the angle of contact is 103.7°. If the operating force of 661N is applied at the end of a lever and the coefficient of friction between the drum and the lining is 0.35, determine: a. The tangential braking force, Ft, in Newtons b. The braking the torque transmitted by the block brake in N-m.
(6) A double square-threaded power screw transmits 1,800in-lb of torque and raises a machine head; the head is guided by linear slides with anti-friction bearings, and thus no appreciable friction is involved. If the coefficient of friction for the threads is 0.1, find: (a) the load that can be raised if the screw has 2 threads/in and an outside diameter of 2½in; (b) if a 4000-lb load is to be lowered, what torque must the screw transmit? (c) if the power screw of rotates 10 rpm, what is the linear speed of the driven head in feet per minute?

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