Question: FIGURE Q1(a) shows a 7.46 kW split-phase motor running at 1750 rev/min. The motor is used to drive a rotary pump, using belt &

FIGURE Q1(a) shows a 7.46 kW split-phase motor running at 1750 rev/min. The motor is used to drive a rotary Assume a flat belt is running over pulleys as shown in FIGURE Q1(b). Driver Slack Side Tight Side Centre

FIGURE Q1(a) shows a 7.46 kW split-phase motor running at 1750 rev/min. The motor is used to drive a rotary pump, using belt & pulleys drive arrangement. Pump operates 24 hours per day. An engineer has suggested a 188-mm small sheave, a 280-mm large sheave, and three B2800 belts. The service factor of 1.2 was augmented by 0.1 because of the continuous-duty requirement. Assume the effective coefficient of friction for V- grooved belt is 0.5123. FIGURE Q1(a) Analyze the belt drive system to verify that the suggestion made by the engineer is safe. Estimate the belts life in passes and hours. [12 marks] [3 marks] Assume a flat belt is running over pulleys as shown in FIGURE Q1(b). Driver Slack Side Tight Side Centre Distance, C Driven FIGURE Q1(b) Using standard notations, derive an equation for the centrifugal tension (7:) in the belt over driven pulley. [10 marks]

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