Có 40+ tài liệu thuộc chủ đề "tiêu chẩn thiết kế"
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17.1 ELASTOMERIC SEAL RINGS SEALS FOR ROTARY MOTION SEALS FOR RECIPROCATING MOTION / 17.9 REFERENCES / 17.15. Seal rings of the O-ring type are used as both static and dynamic seals. O-rings are molded to the size of the elastomeric material with a circular cross section, as shown in Fig. The standard sizes specified in SAE J120a are summarized in...
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18.1 FLYWHEEL USAGE SIZING THE FLYWHEEL STRESS / 18.13. 18.4 FLYWHEELS FOR ENERGY STORAGE STRENGTH AND SAFETY / 18.21. REFERENCES / 18.25. 18.6), rad P Angle, rad. 18.1 FLYWHEELUSAGE. 18.2 SIZINGTHEFLYWHEEL. 18.2.1 Coefficient of Speed Variation. The energy equation U = 0.5/(cOmax - a>min) and the definition of C s combine to give the equation for the required mass moment...
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19.1 INTRODUCTION METRIC STANDARDS / 19.2. STANDARD—INCH UNITS INTERFERENCE-FIT STRESSES ABSOLUTE TOLERANCES STATISTICAL TOLERANCES /19.16 REFERENCES / 19.18. 19.1 INTRODUCTION. customary units [19.1] and for use with SI units [19.2]. 19.2 METRICSTANDARDS. 19.2.1 Definitions. 19.1 and are defined as follows:. 19.2.2 International Tolerance Grades. FIGURE 19.1 Definitions applied to a cylindrical fit. D = VD^D~ (19.2) The ranges of basic...
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20.1 INTRODUCTION KINEMATICS MECHANICS / 20.6. 20.4 BUCKLING AND DEFLECTION STRESSES / 20.9. 20.6 BALL SCREWS/20.10. 20.7 OTHER DESIGN CONSIDERATIONS /20.12 REFERENCES / 20.13. 20.1 INTRODUCTION. The mechanical advantage inherent in the screw is exploited to produce large axial forces in response to small torques. The screw threads are typically formed by thread rolling, which results in high surface hardness,...
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21.1 SCREW THREADS/21.1 21.2 BOLTS/21.5. 21.3 SCREWS NUTS/21.28. 21.1, is designated as UN. FIGURE 21.1 Basic thread profile for unified (UN) and metric (M) threads (ISO 68).. 21.1.1 Choosing the Pitch. TABLE 21.1 Standard Series of UN and UNR Screw Threads*. TABLE 21.2 Standard Diameter-Pitch Combinations for Metric M Screw Threads 1. 21.1.2 Pipe Threads. Table 21.3 gives the basic...
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22.1 RIVETS/22.1 22.2 PINS / 22.8. 22.3 EYELETS AND GROMMETS RETAINING RINGS KEYS / 22.24. 22.6 WASHERS / 22.26 REFERENCES / 22.29. 22.1 RIVETS. 22.1.1 Head Shapes. 22.1 and 22.2. FIGURE 22.1 Standard rivet heads with flat bearing surfaces, (a) Button or round head;. FIGURE 22.2 Various rivet heads, (a) Countersunk head. 22.1.2 Rivet Types. 22.1J).. 22.3e, is a small...
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23.1 SHEAR LOADING OF JOINTS / 23.4. 23.2 ECCENTRIC LOADS ON SHEAR JOINTS / 23.11. 23.5 FATIGUE LOADING OF BOLTED AND RIVETED JOINTS / 23.29. d Nominal diameter of the bolt, in (mm) E Modulus of elasticity, psi (MPa) F Force, Ib (kN). Stiffness of the joint members, Ib/in (kN/mm) Stiffness of gasketed joint, Ib/in (kN/mm) Nut factor. Grip length...
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24.1 INTRODUCTION / 24.2. 24.2 GLOSSARY OF SPRING TERMINOLOGY SELECTION OF SPRING MATERIALS HELICAL COMPRESSION SPRINGS HELICAL EXTENSION SPRINGS HELICAL TORSION SPRINGS BELLEVILLE SPRING WASHER SPECIAL SPRING WASHERS FLAT SPRINGS / 24.53. 24.10 CONSTANT-FORCE SPRINGS TORSION BARS / 24.60. 24.12 POWER SPRINGS HOT-WOUND SPRINGS / 24.64 REFERENCES / 24.67. 24.1 INTRODUCTION. 24.2 GLOSSARY OF SPRING TERMINOLOGY active coils: those coils...
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24.5.8 Tolerances. 24.6 HELICALTORSIONSPRINGS. 24.23). Coil diameter tol- erances are given in Table 24.17.. 24.6.1 Spring Rate. FIGURE 24.24 Common helical torsion-spring end configurations.. (24.33). 24.6.2 Stresses. 24.6.3 Rectangular-Wire Torsion Springs. (24.38). 24.6.4 Tolerances. 24.7 BELLEVILLESPRINGWASHER. 24.25. 24.26.. TABLE 24.18 End-Position Tolerances (for D/d Ratios up to and Including 16). FIGURE 24.25 Belleville washer. 24.7.1 Nomenclature a OD/2, mm (in)....
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25.1 FUNCTIONS AND TYPES OF LUBRICANT SELECTION OF LUBRICANT TYPE / 25.2. 25.3 LIQUID LUBRICANTS: PRINCIPLES AND REQUIREMENTS LUBRICANT VISCOSITY / 25.6. 25.5 BOUNDARY LUBRICATION DETERIORATION PROBLEMS SELECTING THE OIL TYPE LUBRICATING GREASES SOLID LUBRICANTS GAS LUBRICATION / 25.26. 25.11 LUBRICANT FEED SYSTEMS LUBRICANT STORAGE / 25.29 REFERENCES / 25.30. 25.7 FUNCTIONSANDTYPESOFLUBRICANT. 25.2 SELECTIONOFLUBRICANTTYPE. It is difficult to give precise...
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26.1 DEFINITION / 26.1. 26.2 STANDARD CLASSIFICATION SYSTEM FOR NONMETALLIC GASKET MATERIALS / 26.1. 26.3 GASKET PROPERTIES, TEST METHODS, AND THEIR SIGNIFICANCE IN GASKETED JOINTS PERMEABILITY PROPERTIES / 26.3. 26.5 LOAD-BEARING PROPERTIES ENVIRONMENTAL CONDITIONS / 26.12. 26.7 GASKET DESIGN AND SELECTION PROCEDURE / 26.13. 26.8 GASKET COMPRESSION AND STRESS-DISTRIBUTION TESTING INSTALLATION SPECIFICATIONS / 26.23. REFERENCES / 26.23. 26.7 DEFINITION. Figure...
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27.2 LOAD-LIFE RELATION FOR CONSTANT RELIABILITY SURVIVAL RELATION AT STEADY LOAD / 27.8. 27.4 RELATING LOAD, LIFE, AND RELIABILITY GOAL COMBINED RADIAL AND THRUST LOADINGS APPLICATION FACTORS / 27.13. 27.7 VARIABLE LOADING MISALIGNMENT / 27.16 REFERENCES / 27.17. FIGURE 27.1 Photograph of a deep-groove preci- sion ball bearing with metal two-piece cage and dual seals to illustrate rolling-bearing terminology. 27.7...
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28.1 INTRODUCTION / 28.3. 28.2 BEARING AND JOURNAL CONFIGURATIONS BEARING MATERIALS AND SELECTION CRITERIA PRESSURE EQUATION FOR A LUBRICATING FILM JOURNAL BEARING PERFORMANCE /28.16. 28.6 LIQUID-LUBRICATED JOURNAL BEARINGS GAS-LUBRICATED JOURNAL BEARINGS HYDROSTATIC JOURNAL BEARING DESIGN / 28.52 REFERENCES / 28.57. 28.1 INTRODUCTION. 28.1), a journal bearing consists of a rotatable shaft (the journal) contained within a close-fitting cylindrical sleeve (the...
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7 = O (28.13) Combining Eqs. 28.6 LIQUID-LUBRICATED JOURNAL BEARINGS. 28.6.1 LID Effects on Cylindrical Full Journal Bearings. Table 28.9 contains long-bearing results for both Sommerfeld and Gumbel boundary conditions.. FIGURE 28.7 Diagram of an incomplete fluid film.. TABLE 28.9 Long-Bearing Pressure and Performance Parameters Performance Sommerfeld. TABLE 28.10 Short-Bearing Pressure and Performance Parameters Performance. Accurate values of these quantities...
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29.1 GENERAL/29.2 29.2 RIGID COUPLINGS / 29.7. REFERENCES / 29.33 BIBLIOGRAPHY / 29.34. 29.7 GENERAL. 29.1.1 System Requirements. 29.1.2 Coupling Characteristics. 29.1.3 Selecting the Coupling. 29.2 RIGIDCOUPLINGS. FIGURE 29.2 Schematic view of a rigid coupling.. 29.3, the centroidal radius is. (29.4) gives. FIGURE 29.3 Portion of coupling showing keyway.. and 29.7, respectively. FIGURE 29.4 Portion of shaft showing key.. 29.3...
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SUGGESTED READING / 30.50. 30.1.1 Types of Clutches. 30.56). 30.1.2 Selecting Clutches. 30.1.3 Types of Brakes. FIGURE 30.6 Centrifugal clutch. FIGURE 30.7 Classification of brakes.. FIGURE 30.8 Drum brake. 30.9 are both hydraulically operated. FIGURE 30.9 Automotive disk brake. 30.1.4 Selecting a Brake. 30.2 TORQUEANDENERGY CONSIDERATIONS. [30.4J.. 30.2.2 Equivalent Inertias. 30.1 Ia.. 30.11. FIGURE 30.11 Equivalent inertia. 30.2.3 Torque Requirement:...
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31.6 COMPARISON OF BELT DRIVES / 31.37. 31.1.2 Geometry. The dimensions of the different components [pulley diameter, center distance, datum length (pitch length) of the flexible connector] and the operational charac- teristics (speed ratio, angle of wrap, included angle) are directly interrelated.. FIGURE 31.1 Two-pulley drive.. FIGURE 31.2 Multiple-pulley drives.. ft = 180°-OM-X-O 0 + 1 - U (31.10). cos...
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32.1 TYPES, USES, AND CHARACTERISTICS / 32.2. 32.2 ROLLER CHAINS: NOMENCLATURE AND DIMENSIONS SELECTION OF ROLLER-CHAIN DRIVES / 32.7. 32.4 LUBRICATION AND WEAR/32.14. 32.7 SILENT CHAINS: NOMENCLATURE AND DIMENSIONS SELECTION OF SILENT-CHAIN DRIVES / 32.28. REFERENCES / 32.32. 32.7 TYPES, USES. 32.1.1 Chain Drives Compared. 32.1.2 Roller Chains. FIGURE 32.1 Typical roller chain on sprocket. [32.1], but the pitch of...
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33.1 DEFINITIONS / 33.1. 33.2 TOOTH DIMENSIONS AND STANDARDS FORCE ANALYSIS / 33.5. 33.4 FUNDAMENTAL AGMA RATING FORMULAS / 33.6. 33.7 DEFINITIONS. The pinion is the smaller of two mating gears. 33.1, is a theoretical circle upon which all calculations are based. 33.1, is the distance, measured on the theoretical pitch circle, from a point on one tooth to a...
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34.1 INTRODUCTION TERMINOLOGY/34.1. 34.3 GEAR MANUFACTURING / 34.7. 34.4 GEAR DESIGN CONSIDERATIONS GEAR-TOOTH DIMENSIONS GEAR STRENGTH / 34.25. 34.7 DESIGN OF MOUNTINGS COMPUTER-AIDED DESIGN / 34.55. 34.1 INTRODUCTION. 34.2 TERMINOLOGY. 34.2.1 Types of Bevel and Hypoid Gears. FIGURE 34.1 Straight-bevel set. FIGURE 34.2 Spiral-bevel set. They differ from spiral-bevel gears in that the axis of the pinion is offset from...