【摘要】：為研究氣穴對(duì)微尺度下表面紋理中潤(rùn)滑性能的影響,利用自主研發(fā)的微型滑塊面接觸潤(rùn)滑膜厚測(cè)量系統(tǒng)對(duì)具有4種不同凹槽表面的微型滑塊與光滑玻璃面形成的油膜厚度進(jìn)行測(cè)量,并利用高速CCD對(duì)試驗(yàn)過(guò)程中產(chǎn)生的氣穴現(xiàn)象進(jìn)行觀(guān)察和拍攝;選用不考慮負(fù)壓的Reynolds邊界條件和考慮氣穴的JFO邊界條件對(duì)二維Reynolds方程分別進(jìn)行數(shù)值求解,并與實(shí)驗(yàn)測(cè)量值進(jìn)行比較。結(jié)果表明,當(dāng)有氣穴發(fā)生時(shí)基于JFO邊界條件的數(shù)值解更接近實(shí)驗(yàn)測(cè)量值,實(shí)驗(yàn)過(guò)程中拍攝的氣穴圖片也印證了這一結(jié)論。氣穴負(fù)壓對(duì)氣穴區(qū)寬度影響較大,對(duì)入口處的壓力峰幾乎無(wú)影響,而體積彈性模量對(duì)入口處的壓力峰略有影響,而對(duì)氣穴區(qū)寬度無(wú)影響。
[Abstract]:In order to study the effect of cavitation on lubricating performance in microscale surface texture, The thickness of oil film formed between micro slider and smooth glass surface with four different grooves was measured by using the self-developed micro slider surface contact lubricating film thickness measurement system. The cavitation phenomena produced during the experiment were observed and photographed by high speed CCD. The Reynolds boundary condition without negative pressure and the JFO boundary condition with cavitation are used to solve the two-dimensional Reynolds equation numerically, and the results are compared with the experimental results. The results show that the numerical solution based on the JFO boundary condition is closer to the experimental value when the cavitation occurs, and the cavitation images taken during the experiment also confirm this conclusion. The negative pressure of cavitation has great influence on the width of cavitation zone, but has little effect on the pressure peak at the entrance, while the bulk modulus of elasticity has little effect on the pressure peak at the entrance, but has no effect on the width of the cavitation zone.
【作者單位】： 青島理工大學(xué)機(jī)械工程學(xué)院;中國(guó)科學(xué)院蘭州化學(xué)物理研究所固體潤(rùn)滑國(guó)家重點(diǎn)實(shí)驗(yàn)室;
【基金】：國(guó)家自然科學(xué)基金項(xiàng)目(51205216) 山東省自然科學(xué)基金項(xiàng)目(ZR2012EEL10) 山東省高�？萍及l(fā)展計(jì)劃項(xiàng)目(J13LB12)
【分類(lèi)號(hào)】：TH117.2
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本文編號(hào)：2302009