![Question 1 [25 marks] Figure 1 shows a brake drum 325 mm internal diameter, acted on by two brake shoes which are mounted on](http://img.homeworklib.com/questions/e6f72730-e40e-11ea-bf2b-6f4af5b31dea.png?x-oss-process=image/resize,w_560)
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Question 1 [25 marks] Figure 1 shows a brake drum 325 mm internal diameter, acted on...
3 MEE231V OCT/NOV 2018 Question 3 Figure 2 shows a brake drum that is rotating anticlockwise...
3 MEE231V OCT/NOV 2018 Question 3 Figure 2 shows a brake drum that is rotating anticlockwise The brake arm ABF pivots at B and the braking force of 40 N is applied at F The drum has a diameter of 900 mm and rotates at 300 rev/min The coefficient of friction between the brake drum and the brake band is 0,35 180 mm 780 mm A B 60° 604 Figure 2 Calculate 31 The length of the arc of contact...
The double internal long shoe drum brake as shown in Figure 3 has a shoe outer diameter 420 mm and shoe width of 65 mm
Figure 3: Double internal long shoe drum brake The double internal long shoe drum brake as shown in Figure 3 has a shoe outer diameter 420 mm and shoe width of 65 mm. Each shoe is actuated by a force of 4500N. The coefficient of friction for the brake lining is 0.30. Find the magnitude of the maximum pressure and the braking torque.
The figure shows a 400-mmidiameter brake drum with four internally expanding shoes. Vach of the hinge...
The figure shows a 400-mmidiameter brake drum with four internally expanding shoes. Vach of the hinge pins 4 and 8 sapports a pair of shoes. The sctuating mechanism is to be aranged to produce the same force F on each shoe. The face width of the shoes is 75 mm The material unel permits a coefficient of friction of 0.24 and a maximum pressure of 100o kPa.) (a) Determine the actuating force. (b) Estimate the brake capacity (c) Notingg that...
Figure Q2 shows a double short-shoe drum brake rotating in clockwise direction.
Figure Q2 shows a double short-shoe drum brake rotating in clockwise direction. a) Which shoe is self-energizing and which one is self-deenergizing ? b) Find its torque capacity and required actuating force for a = 90 mm, b = 80 mm, e = 30 mm, r = 40 mm, w = 60 mm, and θ = 25°. c) What value of c will make it self-locking? d) Find the reaction forces at the arm pivot in the global XY system. Assume pmax= 1.5 MPa...
The figure shows an internal rim type brake having an inside rim diameter of 12 in and a dimension R = 5 in
The figure shows an internal rim type brake having an inside rim diameter of 12 in and a dimension R = 5 in. The shoes have a face width of 1.5 in and are both actuated by a force of 500 lbf. The mean coefficient of friction is 0.28. a) Find the maximum pressure and indicate the shoe on which it occurs b) Estimate the braking torque effected by each shoe, and find the total braking torque c) Estimate the resulting hinge-pin reaction
Need answer asap thankyou A hydraulically operated disk brake (as shown in Figure 18.4) uses a double calliper. Each half has 65 mm diameter round pad on each side of the disk. The centre of contact...
Need answer asap thankyou
A hydraulically operated disk brake (as shown in Figure 18.4) uses a double calliper. Each half has 65 mm diameter round pad on each side of the disk. The centre of contact of each of the four pads is at a radius of 104 mm. The outside diameter of the disk is 320mm and the disk has a woven ining that provides a friction coefficient of 0.4. The average pressure on the pads is to be...
The symmetric brake shown in the figure has a width of 30 mm with a mean friction coefficient of 0.25. Note that L 150 mm 1 = , L 200 mm 2 = , L 200 mm 3 = and radius of the drum is 150 mm. For an...
The symmetric brake shown in the figure has a width of
30 mm with a mean friction coefficient of 0.25.
Note that
L 150 mm 1
= , L 200 mm 2
= , L 200 mm 3
=
and radius of the drum is 150 mm. For an estimated
actuating force of F=500 N for each brake, determine:
a) The maximum pressure on each shoe
b) The total brake
torque capacity
c) Comment on the self – energizing behavior...
3 MEE231V OCT/NOV 2018 Question 3 Figure 2 shows a brake drum that is rotating anticlockwise The brake arm ABF pivots at B and the braking force of 40 N is applied at F The drum has a diameter of 900 mm and rotates at 300 rev/min The coefficient of friction between the brake drum and the brake band is 0,35 180 mm 780 mm A B 60° 604 Figure 2 Calculate 31 The length of the arc of contact...
The figure shows a 400-mmidiameter brake drum with four internally expanding shoes. Vach of the hinge pins 4 and 8 sapports a pair of shoes. The sctuating mechanism is to be aranged to produce the same force F on each shoe. The face width of the shoes is 75 mm The material unel permits a coefficient of friction of 0.24 and a maximum pressure of 100o kPa.) (a) Determine the actuating force. (b) Estimate the brake capacity (c) Notingg that...
Need answer asap thankyou
A hydraulically operated disk brake (as shown in Figure 18.4) uses a double calliper. Each half has 65 mm diameter round pad on each side of the disk. The centre of contact of each of the four pads is at a radius of 104 mm. The outside diameter of the disk is 320mm and the disk has a woven ining that provides a friction coefficient of 0.4. The average pressure on the pads is to be...
The symmetric brake shown in the figure has a width of
30 mm with a mean friction coefficient of 0.25.
Note that
L 150 mm 1
= , L 200 mm 2
= , L 200 mm 3
=
and radius of the drum is 150 mm. For an estimated
actuating force of F=500 N for each brake, determine:
a) The maximum pressure on each shoe
b) The total brake
torque capacity
c) Comment on the self – energizing behavior...
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