本文關(guān)鍵詞： 油霧 間隙 回轉(zhuǎn)速度 粒徑 速度分布　出處：《東北大學(xué)》2012年碩士論文　論文類型：學(xué)位論文

【摘要】：研究回轉(zhuǎn)表面的不同工作參數(shù)對(duì)流經(jīng)其間油霧粒徑的影響,對(duì)于降低甚至消除油霧潤(rùn)滑現(xiàn)場(chǎng)殘余油霧對(duì)空氣及人員的危害將產(chǎn)生很大的積極推動(dòng)作用。本文結(jié)合工業(yè)應(yīng)用現(xiàn)場(chǎng),通過(guò)仿真與實(shí)驗(yàn)相結(jié)合的方式,研究了不同相對(duì)回轉(zhuǎn)速度下,油霧顆粒流經(jīng)兩回轉(zhuǎn)表面構(gòu)成的間隙后粒徑變化及速度分布情況。通過(guò)改變影響粒徑變化的另外兩個(gè)主要影響因素——不同進(jìn)氣流量和間隙尺寸條件,進(jìn)一步研究相對(duì)回轉(zhuǎn)速度對(duì)粒徑變化的影響,尤其是高速回轉(zhuǎn)對(duì)油霧粒徑的影響。 仿真和實(shí)驗(yàn)是建立在對(duì)油霧顆粒在壁面間的運(yùn)動(dòng)分析和相關(guān)數(shù)值仿真模型及仿真計(jì)算方法研究的基礎(chǔ)上。通過(guò)理論分析明確相對(duì)回轉(zhuǎn)速度、進(jìn)氣流量及間隙尺寸條件對(duì)油霧粒徑變化的主要影響作用,并據(jù)此建立了Fluent仿真模型并搭建了實(shí)驗(yàn)臺(tái)與仿真研究對(duì)比進(jìn)行。 通過(guò)對(duì)仿真及實(shí)驗(yàn)數(shù)據(jù)進(jìn)行分析可知,隨著間隙表面相對(duì)回轉(zhuǎn)速度的增加,間隙出口處的油霧粒徑越來(lái)越大,在進(jìn)氣流量為3m3/h情況下,當(dāng)回轉(zhuǎn)速度達(dá)到4900r/min時(shí),現(xiàn)有顆粒粒度測(cè)量?jī)x就已經(jīng)檢測(cè)不到5μm以下油霧顆粒的存在。并且油霧顆粒在流經(jīng)回轉(zhuǎn)表面構(gòu)成的間隙后會(huì)發(fā)生明顯沉降,出口周圍散逸的油霧顆粒也越來(lái)越少。 其他條件都相同時(shí),隨著進(jìn)氣流量的增加,環(huán)形間隙入口和出口處的油霧粒徑都在減小,油霧流經(jīng)環(huán)形間隙前后的粒徑變化也不斷減小,相對(duì)回轉(zhuǎn)速度對(duì)粒徑變化的影響也越來(lái)越小。間隙尺寸對(duì)油霧粒徑的影響根據(jù)轉(zhuǎn)速的不同而發(fā)生變化,在相對(duì)回轉(zhuǎn)速度為0時(shí),間隙長(zhǎng)度增大,流經(jīng)間隙后的油霧粒徑變大；間隙高度減小,流經(jīng)間隙后的油霧粒徑變大。隨著轉(zhuǎn)速的增加,雖然還是產(chǎn)生同樣規(guī)律變化,但間隙尺寸對(duì)油霧粒徑的影響程度變得越來(lái)越小,當(dāng)轉(zhuǎn)速達(dá)到6800r/min及以上時(shí),這種影響幾乎可以忽略不計(jì),這時(shí)主要是相對(duì)回轉(zhuǎn)速度對(duì)粒徑變化產(chǎn)生影響。
[Abstract]:The influence of different working parameters on the particle size of oil mist was studied. In order to reduce or even eliminate the harm of residual oil mist to air and personnel, this paper combines the industrial application field with simulation and experiment. The relative rotation velocities are studied. The particle size change and velocity distribution after the oil mist particles flow through the clearance formed by the two rotating surfaces. By changing the other two main influencing factors-different inlet air flow rate and clearance size conditions. The influence of relative velocity of rotation on particle size change, especially the influence of high speed rotation on the particle size of oil mist was further studied. The simulation and experiment are based on the analysis of the motion of the oil mist particles between the walls and the related numerical simulation model and the simulation calculation method. The relative velocity of rotation is determined by theoretical analysis. The influence of inlet air flow rate and clearance size on the variation of oil mist particle size is studied. Based on this, the Fluent simulation model is established and the experimental bench is built and compared with the simulation research. Through the analysis of the simulation and experimental data, it can be seen that with the increase of the relative rotational velocity of the clearance surface, the particle size of the oil mist at the clearance exit becomes larger and larger, under the condition of the inlet air flow rate of 3 m3 / h. When the speed of rotation reaches 4900r / min. The existing particle size measurement instrument can not detect the existence of oil mist particles below 5 渭 m, and the oil mist particles will settle obviously after flowing through the gap formed by the rotating surface. There are fewer and fewer particles of oil mist around the exit. When other conditions are the same, with the increase of inlet air flow rate, the diameter of oil mist at the inlet and outlet of annular clearance is decreasing, and the change of particle size of oil mist before and after flowing through annular clearance is also decreasing. The effect of the clearance size on the particle size of the oil mist varies according to the rotational speed, and the gap length increases when the relative rotation speed is 0:00. The particle size of the oil mist becomes larger after flowing through the gap. With the increase of rotational speed, the effect of clearance size on the particle size of oil mist becomes smaller and smaller. When the rotational speed reaches 6800r / min and above, this effect is almost negligible, and it is mainly the relative speed of rotation that has an effect on the change of particle size.
【學(xué)位授予單位】：東北大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2012
【分類號(hào)】：TH11;TP391.9

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