Потребан је документовани критеријум — нема генерисања ISO толеранција
Провера аритметике критеријума за флексибилни ротор
Упоредите једну измерену величину балансирања са једном документованом границом која се већ примењује на исти ротор, мод или раван толеранције, брзину, стање и дефиницију величине.
Аритметичко упоређивање
Само аритметика
маржа=документовано−измерено
f=n/60; ω=2πn/60
“Within entered limit” means only that one entered number does not exceed another entered number on the declared same basis. It is not an ISO acceptance result or proof of satisfactory running behaviour.
ISO21940-12 flexible-rotor scope
ISO21940-12:2016,edition1,was confirmed in2025 and remains current. It presents typical flexible-rotor configurations,balancing procedures,final-state assessment methods and guidelines for balance-quality criteria. ISO states that it is not an acceptance specification,that structural resonances are outside its scope,and that its industrial experience may not apply directly to specialized equipment. Edition2 is under development and will replace the2016 edition when published.
Why the former formulas were removed
ISO21940-11:2016 са Измена1:2022 covers rotors with rigid behaviour and explicitly excludes flexible behaviour. Therefore its G-grade residual-unbalance relation cannot be relabelled as a flexible-rotor modal tolerance. No official source was found for dividing that result equally by “modes+1” or prescribing “modes+2” correction planes universally.
ISO21940-14:2012+Amd1:2022 addresses identifying,assessing and accounting for balance-measurement errors;edition2 is under development. This page does not implement its closed procedures.
Није процењено: rotor category,modal decomposition,mode shapes,modal mass,influence coefficients,critical speeds,run-up/coast-down response,correction-plane effectiveness,thermal state,assembly state,repeatability,measurement errors,structural resonance,operating vibration or specialized-equipment requirements.
