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PD ISO/TR 15144-1:2014 Calculation of micropitting load capacity of cylindrical spur and helical gears - Introduction and basic principles, 2014
- Section sec_1
- Section sec_2
- Section sec_3
- Section sec_3.1
- Section sec_3.2
- Table tab_1
- Section sec_4
- Section sec_5
- Section sec_5.1
- Section sec_5.2
- Section sec_5.3
- Section sec_5.4
- Section sec_5.5
- Section sec_6
- Section sec_6.1
- Section sec_6.2
- Section sec_7
- Section sec_7.1
- Section sec_7.2
- Section sec_7.2.1
- Section sec_7.2.2
- Section sec_8
- Section sec_8.1
- Section sec_8.2
- Section sec_8.2.1
- Section sec_9
- Section sec_9.1
- Section sec_9.2
- Section sec_9.2.1
- Section sec_9.2.2
- Section sec_10
- Figure fig_1
- Section sec_11
- Section sec_11.1
- Figure fig_2
- Figure fig_3
- Section sec_11.2
- Figure fig_4
- Figure fig_5
- Figure fig_6
- Section sec_11.3
- Figure fig_7
- Section sec_11.4
- Figure fig_8
- Section sec_11.5
- Figure fig_9
- Figure fig_10
- Figure fig_11
- Section sec_11.6
- Figure fig_12
- Section sec_11.7
- Figure fig_13
- Figure fig_14
- Figure fig_15
- Section sec_12
- Section sec_13
- Table tab_2
- Section sec_14
- Section sec_14.1
- Figure fig_16
- Table tab_3
- Section sec_14.2
- Section sec_14.3
- Table tab_as
- Figure fig_17
- Table tab_ba
- Figure fig_18
- Section sec_14.4
- Annex sec_A
- Table tab_bc
- Figure fig_A.1
- Table tab_A.1
- Reference ref_1
- Reference ref_2
- Reference ref_3
- Reference ref_4
- Reference ref_5
- Reference ref_6
- Reference ref_7
- Reference ref_8
- Reference ref_9
- Reference ref_10
- Reference ref_11
- Reference ref_12
- Reference ref_13
- Reference ref_14
- Reference ref_15
- Reference ref_16
- Bibliography
- Foreword
- Introduction
- 1 Scope
- 2 Normative references
- 3 Terms, definitions, symbols, and units
- 3.1 Terms and definitions
- 3.2 Symbols and units
- 4 Definition of micropitting
- 5 Basic formulae
- 5.1 General
- 5.2 Safety factor against micropitting, Sλ
- 5.3 Local specific lubricant film thickness, λGF,Y
- 5.4 Permissible specific lubricant film thickness, λGFP
- 5.5 Recommendation for the minimum safety factor against micropitting, Sλ,min
- 6 Material parameter, GM
- 6.1 Reduced modulus of elasticity, Er
- 6.2 Pressure-viscosity coefficient at bulk temperature, αθM
- 7 Velocity parameter, UY
- 7.1 Sum of tangential velocities, vΣ,Y
- 7.2 Dynamic viscosity at bulk temperature, ηθM
- 8 Load parameter, WY
- 8.1 Local Hertzian contact stress pdyn,Y,A according to Method A
- 8.2 Local Hertzian contact stress pdyn,Y,B according to Method B
- 9 Sliding parameter, SGF,Y
- 9.1 Pressure-viscosity coefficient at local contact temperature, αθB,Y
- 9.2 Dynamic viscosity at local contact temperature, ηθB,Y
- 10 Definition of contact point Y on the path of contact
- 11 Load sharing factor, XY
- 11.1 Spur gears with unmodified profiles
- 11.2 Spur gears with profile modification
- 11.3 Buttressing factor, Xbut,Y
- 11.4 Helical gears with εβ < 1 and unmodified profiles
- 11.5 Helical gears with εβ < 1 and profile modification
- 11.6 Helical gears with εβ ≥ 1 and unmodified profiles
- 11.7 Helical gears with εβ ≥ 1 and profile modification
- 12 Contact temperature, θB,Y
- 13 Flash temperature, θfl,Y
- 14 Bulk temperature, θM
- 14.1 Mean coefficient of friction, µm
- 14.2 Load losses factor, Hv
- 14.3 Tip relief factor, XCa
- 14.4 Lubrication factor, XS
- Annex A
(informative)
Calculation of the permissible specific lubricant film thickness λGFP for oils with a micropitting test result according to FVA-Information Sheet 54/7
- Bibliography [Go to Page]