Midterms.pdf - Midterm Research NAME DATE COURSE AND YEAR Class Number SCHEDULE th INSTRUCTIONS:All answers should be rounded up to the 4 decimal place

Midterms.pdf - Midterm Research NAME DATE COURSE AND YEAR...

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Midterm Research NAME: DATE: Class Number COURSE AND YEAR: SCHEDULE: INSTRUCTIONS:All answers should be rounded up to the 4 th decimal place. Express your answers in the units asked for. Write your solutions on a separate piece of bond paper. Any form of erasures and superimpositions on the spaces provided for final answers will be considered wrong. TLO : 1 *Show complete solution and explanation or justification for the final design specifications. 1. The large diameter and face of the disc clutch are 255mm and 25mm, respectively. The helical compression spring used to engage the clutch has 9 ½ active coils of 10mm steel wire. The outer coil diameter is 80mm. The free length of
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Unformatted text preview: the spring is 185mm. When in place with the clutch engaged, its length is 130mm. Assuming 10 pairs of contact surfaces and the motor runs at 1200 rpm and coefficient of friction as 0.15, find the power in terms of kW that the clutch can transmit. Let the spring modulus G = 80 GPa. 2. A disk clutch having an outside diameter of 32 cm and an inside diameter of 12.7cm is connected to an engine that turns at 750 rpm. The coefficient of friction is 0.6 while the pressure between the friction surfaces is 2 kg f /cm 2 . Compute the force on the clutch pedal necessary to disengage the clutch disc from the engine....
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  • Spring '17
  • Engr. Burguillos

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