Experimental Estimation of Journal Bearing Stiffness for Damage Detection in Large Hydrogenerators

<div>Shaft relative and bearing absolute vibrations at <svg height="8.79011pt" id="M290" style="vertical-align:-0.04980946pt" version="1.1" viewbox="-0.0498162 -8.7403 9.23375 8.79011" width="9.23375pt" xmlns="http://www.w3.org/2000/svg" xmlns:xlink="http://www.w3.org/1999/xlink"><g transform="matrix(.013,0,0,-0.013,0,0)"><path d="M700 0V35C631 42 609 53 567 118C509 208 460 288 401 381C449 447 492 506 526 546C567 595 594 607 658 615V650H417V615C481 603 484 593 465 557C441 512 406 457 375 417C333 483 302 536 285 568C273 591 271 603 326 615V650H25V615C93 608 120 591 148 544C201 461 242 391 290 312C233 226 163 135 127 90C98 57 63 41 8 35V0H259V35C192 46 183 54 207 97C228 137 269 202 316 273C390 149 413 111 423 93C440 61 445 47 379 35V0H700Z" id="g13-86"></path><glyph.data ascent="1024" descent="-360" horiz-adv-x="693" vert-adv-y="693" xpluscharwidth="9.009"></glyph.data></g></svg>-direction of the lower journal bearing, with a balanced generator rotor operating with 320 MW.</div>

Shock and Vibration

fig11

Figure 11

Figure 11: Experimental Estimation of Journal Bearing Stiffness for Damage Detection in Large Hydrogenerators 