A centrifugal fan is balanced by placing a 5 gram weight at a radius of 200...

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A centrifugal fan is balanced by placing a 5 gram weight at a radius of 200 mm. The original vibration amplitude was 10.5 mm/s, and after adding the balancing weight, the vibration is 0.9 mm/s. The speed of the fan is 1500 rpm and the weight of the fan is 5 kg. a) Calculate: i. I The residual unbalance (2 marks) The eccentricity The balancing quality grade according to the ISO balancing (2 marks) Standard. (2 marks) b) The stiffness of the fan's shaft is 80 kN/m. Calculate the natural frequency for the fan on the shaft (ignore the weight of the shaft). (2 marks) c) What is going to happen if the fan speed is decreased to 1200 rpm? A centrifugal fan is balanced by placing a 5 gram weight at a radius of 200 mm. The original vibration amplitude was 10.5 mm/s, and after adding the balancing weight, the vibration is 0.9 mm/s. The speed of the fan is 1500 rpm and the weight of the fan is 5 kg. a) Calculate: i. I The residual unbalance (2 marks) The eccentricity The balancing quality grade according to the ISO balancing (2 marks) Standard. (2 marks) b) The stiffness of the fan's shaft is 80 kN/m. Calculate the natural frequency for the fan on the shaft (ignore the weight of the shaft). (2 marks) c) What is going to happen if the fan speed is decreased to 1200 rpm?

Answer rating: 100% (QA)

a i The residual unbalance can be calculated using the formula Residual unbalance Vibration amplitude after balancing Vibration amplitude before balancing Balancing weight Residual unbalance 09 mms 10... View the full answer