本文選題：深海模擬艙　切入點(diǎn)：O形橡膠圈　出處：《北京工業(yè)大學(xué)學(xué)報(bào)》2016年03期

【摘要】：針對(duì)卡箍快開(kāi)蓋結(jié)構(gòu)的臥式深海模擬艙在深海高背壓環(huán)境下存在密封可靠性不足問(wèn)題,提出了一種深海模擬艙O形圈徑向密封結(jié)構(gòu),建立了該結(jié)構(gòu)的非線性有限元模型.通過(guò)O形圈的密封面接觸應(yīng)力與內(nèi)部Von Mises應(yīng)力評(píng)價(jià)該結(jié)構(gòu)的密封可靠性,討論了艙內(nèi)介質(zhì)壓力、O形圈預(yù)壓縮率、槽口倒圓、配合間隙對(duì)深海模擬艙密封性能的影響.仿真結(jié)果表明:加壓過(guò)程中接觸應(yīng)力峰區(qū)位置顯著改變,艙內(nèi)水壓由0 MPa加至25 MPa時(shí),橡膠圈形狀及Von Mises應(yīng)力分布急劇變化,由25 MPa加至45 MPa時(shí),橡膠圈形狀及Von Mises應(yīng)力峰區(qū)位置基本不變,該結(jié)構(gòu)能夠?qū)崿F(xiàn)45 MPa壓力下的有效密封.預(yù)壓縮率的增加會(huì)顯著增加主接觸面密封帶寬度,增大槽口倒圓有助于降低Von Mises應(yīng)力,Von Mises應(yīng)力峰值隨配合間隙的增加先增大后減小,增大配合間隙有助于提高密封帶寬度.試驗(yàn)結(jié)果證明:當(dāng)O形圈的預(yù)壓縮率為10%、槽口倒圓為0.4 mm、配合間隙為0.7 mm時(shí),利用該密封結(jié)構(gòu)所研制的深海高壓艙在40、45、50 MPa水壓時(shí)均能保證有效密封.
[Abstract]:In order to solve the problem of insufficient sealing reliability in deep sea high back pressure environment, an O-ring radial seal structure of deep sea simulator is proposed, and the nonlinear finite element model of the structure is established.The sealing reliability of the structure is evaluated by the contact stress of the sealing surface of the O-ring and the internal Von Mises stress. The effects of the pre-compression ratio of the O-shaped ring, the reverse circle of the groove and the clearance on the sealing performance of the deep-sea simulated cabin are discussed.The simulation results show that the position of contact stress peak area changes significantly during compression. When the water pressure in the cabin is increased from 0 MPa to 25 MPa, the shape of rubber ring and the stress distribution of Von Mises change sharply, from 25 MPa to 45 MPa.The shape of rubber ring and the position of Von Mises stress peak region are almost unchanged. The structure can be effectively sealed at 45 MPa pressure.With the increase of precompression ratio, the width of seal band of the main contact surface will be increased significantly. Increasing the reverse circle of the slot is helpful to reduce the Von Mises stress and the peak value of the Von Mises stress increases first and then decreases with the increase of the fit gap, and the increase of the fit gap will help to increase the width of the seal band.The test results show that when the pre-compression ratio of O-ring is 10 mm, the reverse circle of groove is 0.4 mm, and the matching clearance is 0.7 mm, the deep-sea high-pressure chamber developed by using this sealing structure can ensure the effective seal at 4045-50 MPa water pressure.
【作者單位】： 北京工業(yè)大學(xué)機(jī)械與應(yīng)用電子技術(shù)學(xué)院;
【基金】：國(guó)家“863”計(jì)劃資助項(xiàng)目(2012AA091103) 國(guó)家自然科學(xué)基金資助項(xiàng)目(51375018) 北京市長(zhǎng)城學(xué)者計(jì)劃(CIT&TCD 20130316)
【分類號(hào)】：P742;TB42

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本文編號(hào)：1707932