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

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Dec 11, 2023 305 likes •419 views

Induced Axial Load Fac = 20kN/(2x1.48) = 6.76kN https://koyo.jtekt.co.jp/en/support/calculation-tool/ Preload vs. Displacement 4323N = 11.3 m 0.9 = 0.000077 0.8 sin() 4.32 =

SLIDE 1

Induced Axial Load

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

SLIDE 2

Preload vs. Displacement

𝜀𝑏 = 0.000077 sin(𝛽) ∙ 𝑅0.9 𝑀𝑥𝑓

0.8

𝑅 = 𝐺

𝑏

𝑎𝑡𝑗𝑜(𝛽) = 4.32 25 ∙ sin(15.287) = 0.655𝑙𝑂 𝜀𝑏 = 0.000077 sin(15.287) ∙ 6550.9 150.8 = .01146 ≈ 11.5𝜈𝑛 https://koyo.jtekt.co.jp/en/support/calculation-tool/ 4323N = 11.3µm

Roller and Raceway Profiles Can Dramatically Change Masta Stiffness

SLIDE 3

Optimizing Preload

Life with no preload 40kN 10kN 100hrs

SLIDE 4

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SLIDE 6

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

SLIDE 7

Add Temperature Left Right Left Right Preload Test No Temperature

SLIDE 8

Aluminum Housing α1 = 23.7x10-6 (1/ ⁰C) Steel α2 = 12.5x10-6 (1/ ⁰C) Shaft 60⁰C

∆𝑀𝑈2 = 𝛽2∆𝑈𝑀 = (12.5x10-6)(60-23)(300) = 0.138mm Housing 60⁰C ∆𝑀𝑈1 = 𝛽1∆𝑈𝑀 = (23.7x10-6)(60-23)(300) = 0.263mm

∆𝑀𝑈1,2 = 0.125𝑛𝑛 254mm 300mm Left Right 0.130mm

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