Besplatan Inženjerski Alat
Kalkulator za dizajn platforme za balansiranje
Dizajnirajte meku platformu za oslanjanje (soft support) za terenske balansiranje rotora. Izračunajte potrebnu krutost opruge, prirodnu frekvenciju, statički progib i transmisibilnost.
Rezultati
Prirodna frekvencija platforme
Prirodna frekvencija sustava masa-opruga platforme:
Gdje mukupno = mrotor + mplatforma i kukupno je kombinirana krutost svih opruga (N/m).
Potrebna Krutost po Opruzi
Gdje n je broj opruga i fciljna = RPM/60 × omjer (npr. ×1/3).
Prijenosnost
Neizmješena prenosivost pri radnoj brzini:
Za dobre uslove balanciranja, T treba biti manji od 15%. Odnos frekvencija od 3 daje T ≈ 12,5%.
Statička defleksija
Praktični primjer
Zadano: mrotor = 80 kg, mplatforma = 15 kg, 1800 RPM, 4 opruge, odnos 1/3
mukupno = 95 kg, fop = 30 Hz, fciljna = 10 Hz
kukupno = 95 × (2π×10)² = 375.055 N/m = 375,1 N/mm
kpo opruzi = 375.1 / 4 = 93,8 N/mm
δstatički = 95×9,81 / 375.055 × 1000 = 2,49 mm
T = 1/(3²−1) = 12.5%
⚠️ Napomena: Osigurajte da sve opruge imaju jednaku krutost i da je opterećenje centrirano. Nejednak progib uzrokuje naginjanje, što iskrivljuje vibracije tijekom balanciranja.
A balancing platform (soft support) is a simple structure — typically a steel frame or plate — mounted on springs. It supports a rotor for field balancing by allowing free vibration response at operating speed. The platform's natural frequency is tuned well below operating speed (typically ≤ 1/3).
The natural frequency must be well below operating speed to ensure the system operates in the isolation region — above the resonance peak. At a frequency ratio of 3, transmissibility drops to about 12.5%, meaning the rotor vibrates freely and the balancing instrument can accurately detect unbalance.
Common configurations:
- 4 springs — most common, one at each corner
- 2 springs — small, lightweight rotors
- 3 springs — triangular platforms
- 6–8 springs — large, heavy rotors
All springs must have equal stiffness and the load must be centered.
Welded steel frame or plate (10–20 mm thick) is most common. Aluminum for smaller rotors. Platform mass is typically 10–25% of rotor mass. Ensure the platform is flat and all spring mounting points are at equal height.
Yes, but rubber mounts have higher damping (reducing measurement precision), and stiffness varies with temperature and load history. Coil springs are preferred for their consistent, well-defined stiffness and low damping. Dynamic rubber stiffness is typically 1.3–2× higher than static stiffness.
Procedure opisane na ovoj stranici razvio je i terenski testirao tim Vibromera koristeći Balanset-1A, prenosivi dvokanalni balanser i analizator vibracija za balansiranje rotora na licu mjesta.
Profesionalni instrumenti i softver za balanciranje na terenu. Dizajnirajte vašu platformu za balanciranje i provjerite rezultate s našim prenosivim balansatorima. Korišteno u više od 50 zemalja.
