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1、第36卷第4期哈爾濱工程大學(xué)學(xué)報Vol.36№.42015年4月JournalofHarbinEngineeringUniversityApr.2015氣穴中液壓油溫度隨氣泡膨脹變化規(guī)律1122張健,姜繼海,白云峰,李艷杰(1.哈爾濱工業(yè)大學(xué)機電工程學(xué)院,黑龍江哈爾濱150080;2.沈陽理工大學(xué)機械工程學(xué)院,遼寧沈陽110159)摘要:針對液壓系統(tǒng)中氣穴的產(chǎn)生及其發(fā)展過程常伴隨著液壓油溫度變化的現(xiàn)象,研究了液壓系統(tǒng)中氣穴產(chǎn)生及其發(fā)展過程與液壓油溫度變化的關(guān)系。結(jié)合液壓系統(tǒng)中氣穴產(chǎn)生及其發(fā)展過程的特點,對氣穴中氣泡產(chǎn)生、發(fā)展過程中的熱力學(xué)條件進行適當(dāng)假設(shè),應(yīng)用熱力學(xué)原理推導(dǎo)了氣
2、穴產(chǎn)生時氣泡膨脹階段氣泡半徑變化與液壓油溫度變化之間的關(guān)系式,改進了Rayleigh-Plesset方程。應(yīng)用數(shù)值計算方法對氣泡半徑與液壓油溫度的關(guān)系進行了數(shù)值模擬研究,并通過試驗進行了驗證,得出氣穴產(chǎn)生后,在氣泡膨脹的整個過程中,多變指數(shù)k取1~1.24更符合實際規(guī)律。關(guān)鍵詞:液壓系統(tǒng);氣穴;氣泡半徑;液壓油溫度;Rayleigh-Plesset方程;多變指數(shù)doi:10.3969/j.issn.1006-7043.201312022網(wǎng)絡(luò)出版地址:http://www.cnki.net/kcms/detail/23.1390.U.20150331.1536.009.html中
3、圖分類號:TH137.1文獻標(biāo)志碼:A文章編號:1006-7043(2015)04-0539-05Changelawofhydraulicoiltemperaturewithbubblegrowthincavitation1122ZHANGJian,JIANGJihai,BAIYunfeng,LIYanjie(1.SchoolofMechatronicsEngineering,HarbinInstituteofTechnology,Harbin150080,China;2.SchoolofMechanicalEngineering,ShenyangLigongUniversit
4、y,Shenyang110159,China)Abstract:Aimingatthephenomenonthattheformationanddevelopmentprocessofcavitationaccompanythetem-peraturevariationofhydraulicoilinhydraulicsystem,therelationshipbetweentheformationanddevelopmentprocessofcavitationandthetemperaturevariationofhydraulicoilwasdiscussedinthis
5、paper.Bycombiningthecharacteristicsofthegenerationandthedevelopmentprocessofcavitation,andmakingproperpresumptiononther-modynamicconditionofthegenerationanddevelopmentprocessofcavitation,therelationshipbetweenthevariationofbubbleradiusandthetemperaturechangeofhydraulicoilinthebubbleexpansion
6、stagewhenacavitationap-pearswasderivedbythermodynamicprincipleandtheRayleigh-Plessetequationwasimproved.Subsequently,anumericalcalculationmethodisappliedtocarryoutnumericalsimulationresearchontherelationshipbetweenthebubbleradiusandthetemperatureofhydraulicoil.Inaddition,atestwasappliedforve
7、rification.Theresultsshowthataftercavitationhasappeared,intheentireprocessofbubbleexpansion,itwillconformtopracticallawbetterifthepolytropicexponenttakes1~1.24.Keywords:hydraulicsystem;cavitation;bubbleradius;hydraulicoiltemperature;Rayleigh-Plesse