Page 12 - Gear Technology Solutions

P A R T 4 - S P I R A L B E V E L A N D H Y P O I D G E A R S

16. Psychoacoustic Flank Form Modulations with MicroForm..................... 205
16.1 Background........................................................................................... 205
16.2 The Function of the Ear......................................................................... 205
16.3 Typical Gear Noise................................................................................ 207
16.4 Noise Reduction Solutions in Other Fields............................................ 209
16.5 Noise Reduction by Scrambling............................................................ 210
16.6 Noise Reduction by Topography Scattering…………………………….. 212
16.7 The Practical Obstacles with Flank Form Scattering………………....... 213
16.8 The Solution - MicroForm Modifications…………………………………. 214
16.9 Two Level Modulation………………….................................................. 215
16.10 Explanation of the Modulation Functions............................................. 217
16.11 First Level Modification……………………………………………….……219
16.12 Second Level Modification Along the Path of Contact......................... 222
16.13 Amplitude and Frequency Change…………………………….…………223
16.14 Addition of a Dwell Section...................................................................224
16.15 Practical Results………………………….……………………………….. 225
16.16 Summary.............................................................................................. 227
16.17 Literature……………………………………………………………….……228

17. MicroPulse, MicroShift and MicroForm Parameters................................. 229
17.1 Phoenix Input Screen............................................................................ 229
17.2 MicroForm………………....................................................................... 230
17.3 Parameter Optimizations....................................................................... 232
17.4 MicroShift.............................................................................................. 234
17.5 MicroPulse............................................................................................. 235
17.6 Summary............................................................................................... 236
17.7 Literature…………………………………………………………………….. 236

18. Eight Selective Crowning Sections............................................................ 237
18.1 What is Selective Crowning?................................................................. 237
18.2 Universal Motion Concept - UMC.......................................................... 237
18.3 The Eight Sections of Selective Crowning.............................................241
18.4 Selective Crowning Development Example...........................................243
18.5 Summary............................................................................................... 256
18.6 Literature…………………………………………………………………….. 257

19. Bevel Gear Speed Increasers......................................................................259
19.1 What is Different in Speed Increasers versus Speed Reducers?......... 259
19.2 Design Parameters - Spiral Angle and Profile Shift............................... 260
19.3 Specific Sliding and Lubrication.............................................................262
19.4 Starting at Full Output Load.................................................................. 264
19.5 Dynamic Effects.....................................................................................265
19.6 Maximal Ratios and Self-Locking………………………………………… 269
19.7 Bi-Directional Operation……………...................................................... 270
19.8 Manufacturing and Operation…………………………………………….. 271

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