Can anyone tell me that which method of balancing is being used in overhung fans? For rotors, single plane and double plane balancing can be selected by seeing their D/W ratio where "D" is diameter of the rotor and "W" is the width of the rotor. What will be the width of the of Fan or Blower if the same is the method used to select type of balancing?
I am not so sure about what you are asking. of course, the length-to-diameter ratio will influence your balancing operation. But this ratio has nothing to do with the balancing method . The influence coefficient method can perfectly balance the overhung rotor. I have used this method in field balancing of several overhung gas turbines. Both single plane and double planes can be used, which depends on the rotor being balancd
When W/D ration is less than 0.5, use single plane balancing for speeds below 1000 RPM and two planes for speeds above 1000 RPM.
If W/D is more than 0.5, use single plane for speeds below 500 RPM and two planes for speeds above 500 RPM.
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