Model Construction and Performance Degradation Characteristics of a Deflector Jet Pressure Servo Valve under the Condition of Oil Contamination

<table class="table-group" id="tab3"><tr><td><table class="table"><tr><td class="thead-hr" colspan="4"><hr/></td></tr><tr class="thead"><td class="align_left">Oil pollution level</td><td class="align_center">6</td><td class="align_center">7</td><td class="align_center">8</td></tr><tr><td class="thead-hr" colspan="4"><hr/></td></tr><tr><td class="align_left">Sticking force(N)</td><td class="align_center">7.29</td><td class="align_center">14.57</td><td class="align_center">29.17</td></tr><tr><td class="align_left">Critical pressure gain of pilot stage (pa/m)</td><td class="align_center"><span style="width: 57.257ptpx;"><svg height="11.9413pt" id="M305" style="vertical-align:-0.3499002pt" version="1.1" viewbox="-0.0498162 -11.5914 57.257 11.9413" width="57.257pt" 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="M456 178V225H360V632H320C217 496 115 347 20 206V178H280V106C280 40 276 34 189 27V0H445V27C364 34 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205 550 205 499V114C205 42 199 34 109 27V0H384Z"></path></g><g transform="matrix(.013,0,0,-0.013,41.366,0)"><path d="M241 635C89 635 35 457 35 312C35 153 89 -12 240 -12C390 -12 443 166 443 312C443 466 390 635 241 635ZM238 602C329 602 354 454 354 312C354 172 330 22 240 22C152 22 124 173 124 313S148 602 238 602Z"></path></g><g transform="matrix(.0091,0,0,-0.0091,47.653,-5.741)"><path d="M389 0V32C297 38 291 46 291 118V635C234 613 175 595 109 583V556L161 554C203 552 207 547 207 497V118C207 46 201 38 110 32V0H389Z"></path></g><g transform="matrix(.0091,0,0,-0.0091,52.085,-5.741)"><path d="M245 635C92 635 37 457 37 312C37 149 91 -12 244 -12C395 -12 449 166 449 312C449 469 395 635 245 635ZM243 598C332 598 358 454 358 312C358 173 334 26 245 26C158 26 128 174 128 313S152 598 243 598Z"></path></g></svg></span></td></tr><tr><td class="align_left">Erosion length (mm)</td><td class="align_center">0.0624</td><td class="align_center">0.0515</td><td class="align_center">0.0395</td></tr><tr><td class="align_left">Life under single oil level (flight takeoff landing)</td><td class="align_center">24191</td><td class="align_center">9982</td><td class="align_center">3814</td></tr><tr><td class="align_left">Service life (flight takeoff landing)</td><td class="align_center" colspan="3">8812</td></tr><tr class="table-tr"><td colspan="4"><hr class="tbody-hr"/></td></tr></table></td></tr></table>

<div>The service life under erosion and sticking.</div>

International Journal of Aerospace Engineering

tab3

Table 3

Table 3: Model Construction and Performance Degradation Characteristics of a Deflector Jet Pressure Servo Valve under the Condition of Oil Contamination 

Table 3 | Model Construction and Performance Degradation Characteristics of a Deflector Jet Pressure Servo Valve under the Condition of Oil Contamination 