Induced Axial Load Fac = 20kN/(2x1.48) = 6.76kN - PowerPoint PPT Presentation

Induced Axial Load Fac = 20kN/(2x1.48) = 6.76kN

https://koyo.jtekt.co.jp/en/support/calculation-tool/ Preload vs. Displacement 4323N = 11.3 µm ∙ 𝑅 0.9 𝜀 𝑏 = 0.000077 0.8 sin(𝛽) 𝑀 𝑥𝑓 𝐺 4.32 𝑏 𝑅 = 𝑎𝑡𝑗𝑜(𝛽) = 25 ∙ sin(15.287) = 0.655𝑙𝑂 sin(15.287) ∙ 655 0.9 𝜀 𝑏 = 0.000077 15 0.8 = .01146 ≈ 11.5𝜈𝑛 Roller and Raceway Profiles Can Dramatically Change Masta Stiffness

Optimizing Preload Life with no preload 40kN 100hrs 10kN

25µm 50µm Optimizing left preload results in 2% improvement but reduces right by 1.5%

Preload Test Left No Temperature Right Add Temperature Left Right

Aluminum Housing α 1 = 23.7x10 -6 (1/ ⁰ C) Steel α 2 = 12.5x10 -6 (1/ ⁰ C) Left Shaft 60 ⁰ C ∆𝑀 𝑈2 = 𝛽 2 ∆𝑈𝑀 = (12.5x10 -6 )(60-23)(300) = 0.138mm Housing 60 ⁰ C ∆𝑀 𝑈1 = 𝛽 1 ∆𝑈𝑀 = (23.7x10 -6 )(60-23)(300) = 0.263mm ∆𝑀 𝑈1,2 = 0.125𝑛𝑛 Right 300mm 0.130mm 254mm

Optimized preload for life at this condition 50µm 90µm 130µm 180µm 200µm