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壽命公式 規格表
Life Formula KS Specifications — 5個尺寸
KS B 2021ISO 281ISO 281:2007
KSLife Formula
5 sizes| Item | Exponent p | Formula | Unit | Note | Standard |
|---|---|---|---|---|---|
| 軸承 (Ball) | 3 | L₁₀ = (Cr/P)³ × 10⁶ rev | rev | ∝ 1/n | KS B 2021 |
| 軸承 (Roller) | 10/3 | L₁₀ = (Cr/P)^(10/3) × 10⁶ rev | rev | ∝ 1/n | ISO 281 |
| - | L_h = L₁₀ × 10⁶ / (60·n) | h | n: rpm | ISO 281 | |
| P | - | P = X·Fr + Y·Fa | N | X·Y: 軸承 | ISO 281 |
| - | L_na = a₁·a₂·a₃·L₁₀ | h | ·· | ISO 281:2007 |
ISO 281 / KS B 2021的L₁₀基本額定壽命公式參考。球軸承使用p=3, 滾子軸承p=10/3的載荷指數——基本動額定載荷(Cr)與等效動載荷(P)的比取p次冪得10⁶轉壽命。時間壽命L_h = L₁₀·10⁶/(60n), 修正壽命L_na = a₁·a₂·a₃·L₁₀。等效動載荷P = X·Fr + Y·Fa, X/Y係數按軸承類型查表。