Reed Frequency
Reed Frequency
(OP)
Hi there , im wondering what is the difference between critical speed and reed frequency of a shaft.I believe both are defined as 187.7/sqrt(deflection).
Thanks
Thanks
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RE: Reed Frequency
If we restrict our discussion to shafts and rotors - Reed frequency refers to overhung rotors while critical speed refers to any rotor.
If we talk about entire machines
Reed frequency can also refer to resonant frequency of entire machine such as vertical pump/motor. In that case, the critical speed would likely be close to the reed frequency of the rotor alone but reed frequency of the whole machine is different based on stator, support etc.
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RE: Reed Frequency
Generally, the reed frequency is used to designate the cantilevered bending mode about a fixed base of a vertically mounted pump assembly with its drivemotor.