Jinsi ya kukokotoa Critical Speed
Critical Speed ni nini?
Critical speed is the rotational speed at which a rotating shaft reaches natural frequency resonance. Operating above or below critical speed is essential.
Fomula
Calculate: N_crit = (60 × √(g × δ)) / (π × √(W/g))
- W
- W value — Variable used in the calculation
Mwongozo wa Hatua kwa Hatua
- 1Calculate: N_crit = (60 × √(g × δ)) / (π × √(W/g))
- 2Or use stiffness and inertia: ω_n = √(k/I)
- 3Operating speed should be <70% or >130% of critical
Mifano Iliyotatuliwa
Ingizo
Shaft natural frequency 3000 rpm
Matokeo
Operating range <2100 rpm or >3900 rpm safe
Avoid 2100-3900 band
Makosa ya Kawaida ya Kuepuka
- ✕Operating continuously near critical speed
- ✕Under-estimating critical speed (causes resonance)
Maswali yanayoulizwa mara kwa mara
What happens at critical speed?
Resonance causes excessive vibration, noise, and potential failure from fatigue.
Can you operate near critical speed briefly?
Yes, passing through critical speed quickly during startup/shutdown is acceptable.
Je, uko tayari kukokotoa? Jaribu Kikokotoo kisicholipishwa cha Critical Speed
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