A centrifugal fan is balanced by placing a 7 g weight at a radius of 250 mm. The original vibration amplitude was 11.5 m
Posted: Tue Jun 07, 2022 3:03 pm
A centrifugal fan is balanced by placing a 7 g weight at a
radius of 250 mm. The original vibration amplitude was 11.5 mm/s,
and after adding the balancing weight, the vibration is 0.8 mm/s.
The speed of the fan is 1600 rpm and the weight of the fan is 7
kg.
What will happen if the fan speed is decreased to 1300 rpm?
A centrifugal fan is balanced by placing a 7 g weight at a
radius of 250 mm. The original vibration amplitude was 11.5 mm/s,
and after adding the balancing weight, the vibration is 0.8 mm/s.
The speed of the fan is 1600 rpm and the weight of the fan is 7 kg.
a)Calculate: i.The residual unbalance (2 marks) ii.The eccentricity
(2 marks) iii.The balancing quality grade according to the ISO
balancing standard. (2 marks) b)The stiffness of the fan’s shaft is
85 kN/m. Calculate the natural frequency for the fan on the shaft
(ignore the weight of the shaft). (2 marks) What will happen if the
fan speed is decreased to 1300 rpm?
radius of 250 mm. The original vibration amplitude was 11.5 mm/s,
and after adding the balancing weight, the vibration is 0.8 mm/s.
The speed of the fan is 1600 rpm and the weight of the fan is 7
kg.
What will happen if the fan speed is decreased to 1300 rpm?
A centrifugal fan is balanced by placing a 7 g weight at a
radius of 250 mm. The original vibration amplitude was 11.5 mm/s,
and after adding the balancing weight, the vibration is 0.8 mm/s.
The speed of the fan is 1600 rpm and the weight of the fan is 7 kg.
a)Calculate: i.The residual unbalance (2 marks) ii.The eccentricity
(2 marks) iii.The balancing quality grade according to the ISO
balancing standard. (2 marks) b)The stiffness of the fan’s shaft is
85 kN/m. Calculate the natural frequency for the fan on the shaft
(ignore the weight of the shaft). (2 marks) What will happen if the
fan speed is decreased to 1300 rpm?