Why is centrifuge bowl balancing critical?

Centrifuge bowls spin at very high speeds (3,000–10,000+ RPM), creating enormous centrifugal forces. Even small unbalance produces large dynamic forces that damage bearings, seals, and the spindle. Precise balancing extends service life and ensures separation efficiency.

What balance grade should I use for a separator?

G2.5 is recommended for disc stack separators and high-speed centrifuges. G6.3 is acceptable for decanter centrifuges and lower-speed separators. G1.0 may be required for ultra-high-speed lab centrifuges.

How is g-force at the bowl rim calculated?

RCF (relative centrifugal force) = ω² × R / (9.81 × 1000), where ω is angular velocity in rad/s and R is bowl radius in mm. This gives the g-force as a multiple of gravitational acceleration.

What causes centrifuge unbalance?

Common causes include uneven sediment buildup, worn or missing disc stack plates, damaged bowl components, incorrect reassembly after cleaning, and manufacturing tolerances. Regular cleaning and inspection help maintain balance.

Can separators be balanced in-situ?

Yes, portable balancing instruments can measure vibration during operation and calculate correction masses. This is especially valuable for large decanters that are difficult to remove. Vibromera's Balanset series supports in-situ centrifuge balancing.

免費工程工具

分離機 / 離心機動平衡校正計算器

依據 ISO 21940 標準，計算碟片式分離機與臥螺離心機的允許轉鼓不平衡量、偏心量、離心力與 G 力。

ISO 21940-11 碟片式 / 臥螺式 G 力

結果

許用不平衡量

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比不平衡量（偏心）

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允許不平衡下的離心力

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轉鼓邊緣 G 力 (RCF)

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角速度 ω

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允許不平衡量 (ISO 21940)

離心機轉鼓的允許殘餘不平衡量係依據 ISO 21940-11 標準公式計算：

G — 平衡品質等級 (mm/s)
m — 轉鼓質量 (kg)
ω = 2π·n/60 — 角速度 (rad/s)

離心力

G 力 (相對離心力)

轉鼓邊緣的 G 力代表分離能力：

其中 R 為轉鼓半徑 (mm)。此值以重力加速度倍數 (×g) 表示。

實務範例

範例 — 碟片式分離機

已知： 轉鼓質量 = 40 kg，轉速 = 6000 RPM，等級 = G2.5，直徑 = 300 mm

ω = 2π × 6000 / 60 = 628.32 rad/s

U_每 = 2.5 × 40 × 1000 / 628.32 = 159.2 g·mm

F = 159.2 / 1e6 × 628.32² = 62.8 N

G 力 = 628.32² × 150 / (9.81 × 1000) = 6,036 ×g

⚠️ 注意： 高速離心機需要極其嚴格的動平衡公差。即使在 6000+ RPM 下僅數克的不平衡量，也會產生數百牛頓的離心力。轉鼓重新組裝與碟片更換後，務必驗證動平衡狀態。