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Handbook of Mechanical Engineering Calculations P22

BEARING DESIGN AND SELECTION Determining Stresses, Loading, Bending Moments, and Spring Rate in Spoked Bearing Supports 22.1 Hydrodynamic Equations for Bearing Design Calculations 22.6 Graphic Computation of Bearing Loads on Geared Shafts 22.13 Shaft Bearing Load Analysis Using Polar Diagrams 22.17 Journal Bearing Frictional Horsepower Loss During Operation 22.21 Journal Bearing Operation Analysis | Source HANDBOOK OF MECHANICAL ENGINEERING CALCULATIONS SECTION 22 BEARING DESIGN AND SELECTION Determining Stresses Loading Bending Moments and Spring Rate in Spoked Bearing Supports 22.1 Hydrodynamic Equations for Bearing Design Calculations 22.6 Graphic Computation of Bearing Loads on Geared Shafts 22.13 Shaft Bearing Load Analysis Using Polar Diagrams 22.17 Journal Bearing Frictional Horsepower Loss During Operation 22.21 Journal Bearing Operation Analysis 22.22 Bearing Type Selection of a Known Load 22.23 Shaft Bearing Length and Heat Generation 22.28 Roller-Bearing Operating-Life Analysis 22.31 Roller-Bearing Capacity Requirements 22.32 Radial Load Rating for Rolling Bearings 22.32 Roller-Bearing Capacity and Reliability 22.34 Porous-Metal Bearing Capacity and Friction 22.35 Hydrostatic Thrust Bearing Analysis 22.37 Hydrostatic Journal Bearing Analysis 22.39 Hydrostatic Multidirection Bearing Analysis 22.42 Load Capacity of Gas Bearings 22.46 DETERMINING STRESSES LOADING BENDING MOMENTS AND SPRING RATE IN SPOKED BEARING SUPPORTS Spoked bearing supports are used in gas turbines large air-cooling fans electricmotor casings slotted for air circulation and a variety of other applications. For the shaft and 6-spoked bearing system in Fig. 1 having three rotor masses and these parameters and symbols FIGURE 1 Shaft and 6-spoked bearing system having three rotor masses. Product Engineering. 22.1 Downloaded from Digital Engineering Library @ McGraw-Hill www.digitalengineeringlibrary.com Copyright 2006 The McGraw-Hill Companies. All rights reserved. Any use is subject to the Terms of Use as given at the website. BEARING DESIGN AND SELECTION 22.2 DESIGN ENGINEERING SI values P 10 000 lb at either bearing IS 25 in4 IR 0.3 in4 A 7 in2 for ring also ES Er 10 X 106 psi L 10 in R 12 in CR 0.40 in 44 480 N 1040.6 cm4 12.5 cm4 45.2 cm2 68 900 MPa 25.4 cm 30.5 cm 8.9 cm 1.02 cm Symbols SI values A spoke cross-section area in2 CS distance neutral axis to extreme fiber of spoke in