책 소개
This publication serves as a comprehensive Technical Sheet specifically developed to assist engineers and technical professionals in analyzing and calculating lubricant leakage phenomena related to oil seals. Designed for practical application, it provides in-depth guidance on geometry analysis, shaft tolerance design, experimental validation, and theoretical evaluation. The content is particularly suited for those working with industrial machinery and rotary systems, where sealing performance is critical. The key areas covered in this Technical Sheet include the following : 1. Geometrical Analysis of Oil Seal Profiles 2. Tolerance Determination for the Output Shaft Where the Oil Seal is Installed 3. Practical Implementation Using the Taguchi Method in Industrial Settings 4. Real-World Evaluation Under Practical Product Conditions This Technical Sheet offers a practical and theoretically grounded framework for understanding and controlling lubricant leakage in oil seal systems. It combines measurement-based design practices, shaft-tolerance optimization, and experimental design methodology with real-world constraints and practical implementation tools. Engineers, designers, and maintenance professionals seeking to enhance sealing reliability or address chronic leakage issues will find this guide a valuable resource grounded in both theory and practice.
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Preface 3 1. Scope 5 2. Normative References 7 3. Definitions, Symbols, Quantities and Units 13 4. Theory 14 4.1 Oil Seal Lip Geometry 14 4.2 Material Properties 29 4.3 Calculation Step of Material Properties 32 4.4 Calculation the Force 34 4.5 Oil Seal Dimensions 36 4.4 Calculation the Force(Continued) 39 4.6 Calculation the Surface Tension of Lubricant 42 4.7 Calculation the Load(Contact Stress) Distribution 53 4.8 TEHL(Thermal Elasto-Hydrodynamic Lubrication) of Line Contacts 57 4.9 Seperation due to Geometry of Undeformed Regions 64 4.10 Calculation the Surface Temperature with Energy Equation 67 4.11 Calculation the Mass Flow Rate 71 4.12 Calculation the Temperature Rising(for Temperature Prediction) 73 4.13 Calculation the Shear Force(or Coefficient of Friction) 75 4.14 Calculation the Bearing Radial Clearance 77 4.15 Calculation the Misalignment of Inner/Outer Bearing Race 80 4.16 Calculation the Bearing Tilting Angle 91 4.14 Calculation the Bearing Radial Clearance(Continued) 107 4.17 Calculation the Oil Seal Lip Deformation 116 4.18 Calculation the WLF(Williams-Landel-Ferry) Equation 125 4.19 Calculation the Archard’s Wear Law 127 4.20 Calculation the Angles at Air Side and Oil Side of Oil Seal Lip 130 4.21 Extension of Theory 133 4.21.1 Wear Depth 134 4.21.2 Schematic Representation of Local Contact Surfaces 136 5. Appendix 142 5.1 Appendix A : Cross-Sectional Profile of Oil Seal 142 5.2 Appendix B : Dimensional Measurement of Garter Spring 143 5.3 Appendix C : Dimensional Extraction Based on Oil Seal Cross-Sectional Profile 144 5.4 Appendix D : Engineering Drawings of the Test Jig 146 5.5 Appendix E : Test Jig Machined/Assemble and Others 154 5.6 Appendix F : Measurement Equipment 158 5.7 Appendix G : Test Jig Measurement Data 161 5.8 Appendix H : KISSsoft Simulation Based on Measured Dimensions 164 5.9 Appendix I : Test Code Implementation Using Python Code 188 5.10 Appendix J : Experimental Analysis Using Taguchi Method 190 5.11 Appendix K : Verification of Theoretical Sealing Conditions Using Python Code 192
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