資源描述：
《氣浮無(wú)摩擦氣缸及氣浮特性仿真.pdf》由會(huì)員上傳分享，免費(fèi)在線閱讀，更多相關(guān)內(nèi)容在行業(yè)資料-天天文庫(kù)。
1、第48卷第2期Jou浙rnalof江Zhejia大ngUn學(xué)iversit學(xué)y(En報(bào)gine(er工ing學(xué)S版cie)nce)Vo1．48NO．22014年2月Feb．2O14DOI：10．3785／j．issn．1008—973X．2014．02．005氣浮無(wú)摩擦氣缸及氣浮特性仿真朱曉，陶國(guó)良，劉昊，孟德遠(yuǎn)，班偉，錢(qián)鵬飛(浙江大學(xué)流體動(dòng)力與機(jī)電系統(tǒng)國(guó)家重點(diǎn)實(shí)驗(yàn)室，浙江杭州310027)摘要：為了滿足氣動(dòng)系統(tǒng)中高精度伺服控制對(duì)低摩擦氣缸的需求，提出一種利用靜壓氣體軸承作為活塞的新型無(wú)摩擦氣缸．針對(duì)軸承耗氣量及徑向承載能力難以準(zhǔn)確建模的問(wèn)題，構(gòu)建一種基于有限元數(shù)值求
2、解方法的軸承氣膜壓力計(jì)算方法．利用該方法，分析軸承的結(jié)構(gòu)參數(shù)及時(shí)變的環(huán)境參數(shù)對(duì)軸承氣浮特性的影響．結(jié)果表明，在節(jié)流孑L末端引入均壓腔能夠顯著增加了軸承的徑向承載能力，消除氣膜中節(jié)流孔附近的壓力尖峰，使軸承穩(wěn)定性增強(qiáng)；供氣壓力、徑向載荷和偏心率等時(shí)變參數(shù)對(duì)氣浮特性的綜合影響增加了簡(jiǎn)化活塞泄漏模型的困難．為了后續(xù)對(duì)氣缸進(jìn)行控制，根據(jù)氣浮特性仿真結(jié)果，提出一種基于特定徑向負(fù)載假設(shè)下的泄漏量模型簡(jiǎn)化方法．關(guān)鍵詞：無(wú)摩擦氣缸；氣體軸承；有限單元法；氣浮特性中圖分類(lèi)號(hào)：TH138文獻(xiàn)標(biāo)志碼：A文章編號(hào)：1008—973X(2014)02—2l4一O7Non。Ifrictionpn
3、eumaticcylinderandsimulationoftheflotationcharacteristicsofthebearingZHUXiao，TAOGuo—liang，LIUHao，MENGDe—yuan，BANWei，QIANPeng—fei(StateKeyLaboratoryofFluidPowerTransmissionandControl，ZhejiangUniversity，Hangzhou310027，China)Abstract：Anewnon—frictionpneumaticcylinderwithanaerostaticbearing
4、asitspistonwasproposedtosatisfythedemandoflow—frictioncylinderinhigh-precisionpneumaticservosystems．Theworkingcharacteristicsofthebearing(WCOB)，radialloadcarryingcapacity(RLCC)andairconsumption，aredifficulttobemodeledaccurately．Inviewofthis，themathematicalmodelofthepressuredistributiono
5、ftheairfilmwasestablished。anumerica1solutionmethodofthismodelbasedonfiniteelementmethod(FEM)wasconstructed，theinfluenceofthebearingSstructuralparametersandtime—varyingparameterstotheworkingcharacteristicsofthebearingwerestudied．Thesimulationresultsshowthatintroducingarecesschambertothee
6、ndoftheorificeholecanincreasetheRICCsignificantlyandsmooththepressuredistributionaroundtheorificeintheairfilm，asaresultofwhichthebearingwil1workmorestable；thetime—varyingparameters，suchassupplyingpressure，radialloadactingonthebearingandeccentricityofthepiston，makeacombinedeffectontheWCO
7、B，whichbringmoredifficultiestothemodelsimplification．Inviewofthis，asolutionbasedontheassumptionthattheradialloadactingonthepistonliesbetweensomeparticularworkingpointswasproposedinthispapertosimplifythemodelingoftheleakage．Keywords：non—frictioncylinder；airbearing；finiteelementm
