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1、2013年8月潤(rùn)滑與密封Aug.2013第38卷第8期LUBRICATIONENGINEERINGV0l_38No.8DOI:10.3969/j.issn.0254—0150.2013.08.002可傾瓦滑動(dòng)軸承的靜態(tài)性能分析李偉光彭醋周平(華南理工大學(xué)機(jī)械與汽車工程學(xué)院廣東廣州510640)摘要:研究可傾瓦滑動(dòng)軸承的靜態(tài)性能。采用有限差分法求解可傾瓦滑動(dòng)軸承的雷諾方程,編寫三瓦可傾瓦滑動(dòng)軸承油膜壓力分布的計(jì)算程序,使用Matlab軟件對(duì)雷諾方程進(jìn)行迭代運(yùn)算,得到軸承的油膜承載力和油膜厚度的分布
2、。結(jié)果表明:三瓦可傾瓦滑動(dòng)軸承軸瓦上同一周向角度的油膜厚度在軸向上是相等的,最小油膜厚度與最大油膜壓力均出現(xiàn)在下軸瓦上;在其他條件不變的情況下,偏心率越大時(shí),油膜承載力越大,阻尼系數(shù)、溫升和功耗越低,而溫升和功耗隨軸頸轉(zhuǎn)速的增加而呈近似線性規(guī)律增加,因此在設(shè)計(jì)與選用軸承時(shí),為滿足軸承承載力的需求,應(yīng)盡量選擇低的軸頸轉(zhuǎn)速和高的偏心率。關(guān)鍵詞:可傾瓦滑動(dòng)軸承;雷諾方程;靜態(tài)性能中圖分類號(hào):TP271文獻(xiàn)標(biāo)識(shí)碼:A文章編號(hào):0254—0150(2013)8—006—7AnalysisonStaticP
3、erformanceofTiltingPadSlidingBearingLiWeiguangPengZheZhouPing(SchoolofMechanical&AutomotiveEngineering,SouthChinaUniversityofTechnology,GuangzhouGuangdong510640,China)Abstract:Thestaticperformancesoftiltingpadbearingswerestudied.TheReynoldsequationof
4、tiltingpadslidingbearingswassolvedbyfinitedifferencemethod,thecalculationprogramoftheoilfilmpressuredistributionofthreetiltingpadslidingbearingwaswritten,andtheoilfilmbearingcapacityandfilmthicknessdistributionwereobtainedthroughtheiterativecalculati
5、onofReynoldsequationusingMatlabsoftware.Theresultsshowthatthefilmthicknessinthesameaxialangleofthreetiltingpadsbearingbushisequal,andtheminimumfilmthicknessandmaximumfilmpressurearebothap-pearedinthelowerbush.Whenotherconditionsarethesame,thehigherth
6、eeccentricrateis,thegreaterthebearingca—pacityoftheoilfilmis,andthelowerthedamping,ratio,temperatureandpowerconsumptionare.Whilethetemperaturerisingandpowerconsumptionareincreasedinlinearityalongwiththeaxisjournalspeed.Thereforeinthedesignandse-lecti
7、onofbearings,thelow—speedandhigheccentricityshouldbechoseninordertomeetbearingcapacityneeds.Keywords:tiltingpadslidingbearing;Reynoldsequation;staticperformance隨著時(shí)代不斷進(jìn)步,工業(yè)發(fā)展對(duì)機(jī)械轉(zhuǎn)子系統(tǒng)的快捷求解成為可能。本文作者使用Matlab軟件,要求越來越高,因而需要大量高精度、低功耗、高穩(wěn)將雷諾方程的有限差分法編寫為程序語言,求解了
8、三定的軸承作為系統(tǒng)支承件。由于可傾瓦滑動(dòng)軸承中各瓦塊可傾瓦軸承的油膜壓力分布,并進(jìn)一步對(duì)可傾瓦瓦塊彼此獨(dú)立地繞支點(diǎn)自由擺動(dòng),以適應(yīng)運(yùn)轉(zhuǎn)條件的滑動(dòng)軸承的靜態(tài)性能進(jìn)行了分析。改變,因而擁有較好的穩(wěn)定性,在汽輪機(jī)和風(fēng)機(jī)等行1可傾瓦滑動(dòng)軸承雷諾方程的基本形式業(yè)中獲得了廣泛的應(yīng)用J。但是可傾瓦軸承瓦塊的擺圖1為三瓦可傾瓦滑動(dòng)軸承結(jié)構(gòu)示意圖。下標(biāo)i動(dòng)特性使性能計(jì)算復(fù)雜化,給可傾瓦軸承的設(shè)計(jì)和研代表瓦塊編號(hào);O為軸承座中心、支點(diǎn)圓心;O為軸究帶來了很大困難。隨著國內(nèi)外學(xué)者對(duì)可傾瓦軸承性頸中心;O為瓦塊未擺動(dòng)時(shí)