本文選題：剖分式機械密封 + 螺旋槽��； 參考：《南京林業(yè)大學(xué)》2014年碩士論文

【摘要】：與普通的穿套在軸上的機械密封相比，剖分式機械密封安裝拆卸方便、經(jīng)濟性好。本文以螺旋槽端面剖分式機械密封為研究對象，對其密封性能和剖分環(huán)變形規(guī)律進行分析。首先，針對給定的工況參數(shù)，設(shè)計出一款新型剖分式機械密封，，在剖分動環(huán)端面開螺旋槽造型，利用ANSYS Fluent進行數(shù)值模擬，研究了工況參數(shù)、槽型幾何參數(shù)對螺旋槽上游泵送密封性能的影響，優(yōu)化螺旋槽型的結(jié)構(gòu)參數(shù)；其次，分析了螺旋槽端面剖分式機械密封溫度場、熱變形及熱-結(jié)構(gòu)耦合變形規(guī)律，研究了主軸轉(zhuǎn)速、沖洗量、膜厚和箍筋壓應(yīng)力對剖分式機械密封溫度場、熱變形及熱-結(jié)構(gòu)耦合變形的影響。具體內(nèi)容如下： (1)設(shè)計了一款安裝、更換便捷，具有自緊密封的能力，適用于高壓工況的新型剖分式機械密封。其主要特點在于：動靜環(huán)為對開半環(huán)，安裝、更換方便；動靜環(huán)在承受介質(zhì)壓力時，剖分面、動環(huán)和動環(huán)座、以及靜環(huán)和靜環(huán)座之間的接觸壓力隨被密封介質(zhì)壓力的增大而增大，提高了被密封介質(zhì)流出密封面的阻力，具有自緊密封的能力； (2)利用ANSYS Fluent對螺旋槽液膜密封進行數(shù)值模擬，研究結(jié)果表明： (a)端面槽形幾何參數(shù)適宜的取值范圍為：12°α18°,5μmh10μm,0.5β0.8，0.4γ0.7,8Ng14。 (b)正交試驗表明：槽深、槽寬徑寬比對泵送量的影響顯著；槽深、槽寬徑寬比對開啟力的影響特別顯著，槽數(shù)對開啟力影響顯著；槽深對軸向剛度的影響特別顯著，螺旋角、槽壩長比對軸向剛度影響顯著。 (3)利用ANSYS有限元分析軟件熱-結(jié)構(gòu)耦合分析模塊，對螺旋槽端面剖分式機械密封剖分環(huán)環(huán)端面溫度場、熱變形及熱-結(jié)構(gòu)耦合變形進行了研究�？傻贸鲆韵陆Y(jié)論: (a)端面溫度最高值出現(xiàn)在密封端面內(nèi)徑處，剖分靜環(huán)端面溫度明顯高于剖分動環(huán)端面溫度，且溫度使密封端面和分型面產(chǎn)生正錐度變形，而箍筋壓應(yīng)力能夠有效抑制端面及分型面的變形。 (b)隨著沖洗量的增加，剖分靜環(huán)端面的溫度逐漸降低，端面溫度差增大，熱變形錐度增大；端面熱-結(jié)構(gòu)耦合變形增大，變形錐度增大；其次，分型面X軸向熱變形增大，變形錐度增大。剖分動環(huán)端面的溫度逐漸降低，端面軸向熱變形減小，變形錐度減小；端面熱-結(jié)構(gòu)耦合變形減小，變形錐度值減小；其次，分型面熱變形減小，變形錐度減小。 (c)隨著膜厚的增加，剖分靜環(huán)端面的溫度逐漸降低，熱變形減小，熱變形錐度減��；端面熱-結(jié)構(gòu)耦合變形值減小，變形錐度值減�。黄浯�，分型面X軸向熱變形減小，變形錐度減小。剖分動環(huán)密封端面的溫度逐漸降低，端面熱變形減小，變形錐度減小；端面熱-結(jié)構(gòu)耦合變形值減小，變形錐度先減小后增大，膜厚達到4μm時，錐度最��；其次，分型面X軸向熱變形減小，變形錐度減小。 (d)主軸轉(zhuǎn)速對剖分動環(huán)和剖分靜環(huán)的影響規(guī)律一致。隨著主軸轉(zhuǎn)速的增加，端面的溫度增大，端面熱變形增大，變形錐度增大；端面熱-結(jié)構(gòu)耦合變形值增大；其次，分型面X軸向熱變形增大，變形錐度增大。 (e)隨著箍筋壓應(yīng)力增大，剖分動環(huán)和剖分靜環(huán)的耦合變形值隨著箍筋壓應(yīng)力增加而增大，變形錐度增大。因此，箍筋壓應(yīng)力并不是越大越好，必須針對給定工況，在保證密封基礎(chǔ)上，選擇合適的箍筋壓應(yīng)力。
[Abstract]:Compared with the mechanical seal on the shaft, the split type mechanical seal is easy to disassemble and has good economy. In this paper, the sealing properties of the spiral groove face and the deformation law of the split ring are analyzed. First, a new type of split mechanical seal is designed for the given working conditions. By using ANSYS Fluent for numerical simulation, the influence of working condition parameters and groove geometric parameters on the performance of the upstream pumping and sealing of the spiral groove is studied, and the structural parameters of the spiral groove are optimized. Secondly, the temperature field, the thermal deformation and the thermal structure coupling deformation of the spiral groove face are analyzed. The influence of spindle speed, washing amount, film thickness and pressure stress on the mechanical seal of split type, thermal deformation and thermal structure coupling deformation are studied.
(1) a new type of split type mechanical seal is designed for installation, easy to replace, self tight seal and suitable for high pressure conditions. Its main features are: the dynamic and static ring is the open half ring, the installation, and the replacement are convenient; the dissection, the moving ring and the movable ring, and the contact pressure between the static ring and the static ring seat when the dynamic ring is subjected to the pressure of the medium. With the increase of the pressure of the sealed medium, the resistance of the sealed medium flowing out of the sealing surface is enhanced, and the self sealing ability is sealed.
(2) numerical simulation of spiral groove liquid film seal is carried out by using ANSYS Fluent.
(a) the suitable geometry value of the groove geometry is: 12 degree alpha 18 degrees, 5 mh10 mh10 m, 0.5 beta 0.8,0.4 0.7,8Ng14.
(b) orthogonal test shows that the influence of the groove depth and the width width of the groove on the pump volume is remarkable; the depth of the groove and the width and width of the groove have a special effect on the opening force, and the number of grooves has a significant influence on the opening force; the groove depth has a special effect on the axial stiffness, and the spiral angle and the length of the groove and dam have a significant influence on the axial stiffness.
(3) using the thermal structure coupling analysis module of ANSYS finite element analysis software, the temperature field, thermal deformation and thermal structure coupling deformation of the spiral groove end section mechanical seal are studied. The following conclusions are obtained.
(a) the maximum end face temperature appears at the inner diameter of the seal face. The temperature of the end face is obviously higher than the end surface temperature of the dissection ring, and the temperature makes the seal face and the parting surface have a positive taper, and the pressure stress of the stirrup can effectively restrain the deformation of the face and the subsurface.
(b) with the increase of the flushing amount, the temperature of the end surface of the split static ring is gradually reduced, the temperature difference of the end face increases, the taper of the thermal deformation increases, the coupling deformation of the end face increases and the deformation taper increases. Secondly, the axial thermal deformation of the split surface increases and the deformation taper increases. The temperature of the end face of the split ring is gradually reduced and the axial thermal deformation of the end face decreases, and the end face axial thermal deformation is reduced and changed. The taper decreases, the thermal structural coupling deformation decreases, and the deformation taper decreases. Secondly, the thermal deformation of the parting surface decreases and the deformation taper decreases.
(c) with the increase of the thickness of the membrane, the temperature of the end surface of the split static ring is gradually reduced, the thermal deformation decreases, the taper of the thermal deformation decreases, the coupling deformation value of the end face is reduced and the deformation taper decreases. Secondly, the axial thermal deformation of the split surface decreases and the deformation taper decreases. The temperature of the seal end face is gradually reduced, the end face deformation decreases and the deformation of the end face is reduced. The deformation of the end face is reduced and the deformation is deformed. The taper decreases, the thermal structure coupling deformation value decreases, the deformation taper decreases first and then increases. When the film thickness reaches 4 m, the taper is the smallest. Secondly, the X axial thermal deformation decreases and the deformation taper decreases.
(d) the influence of the spindle speed on the dissection ring and the split static ring is the same. With the increase of the spindle speed, the temperature of the end face increases, the end face heat deformation increases, the deformation taper increases, the thermal structural coupling deformation value of the end face increases, and the X axial thermal deformation increases and the deformation taper increases.
(E) with the increase of the pressure stress of the stirrup, the coupling deformation value of the split dynamic ring and the split static ring increases with the increase of the pressure stress of the stirrup, and the deformation taper increases. Therefore, the pressure stress of the stirrup is not the greater the better, and the suitable pressure stress must be chosen on the basis of the given condition.
【學(xué)位授予單位】：南京林業(yè)大學(xué)
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2014
【分類號】：TH136

【相似文獻】

相關(guān)期刊論文 前10條

1 閻德琦 ,梁應(yīng)彪;剖分式受拉連桿的應(yīng)力、應(yīng)變分析(有限單元法)[J];太原重型機械學(xué)院學(xué)報;1987年S1期

2 金元林;;剖分式大齒輪定位銷孔的加工[J];機械工藝師;1992年07期

3 鐘昌彬;;剖分式圓柱軸承損傷因素分析與控制[J];冶金叢刊;2009年02期

4 閆志旭;;一種剖分式聚氨酯密封件的研制[J];液壓氣動與密封;2012年10期

5 楊鐘勝;;大型剖分式動壓軸承的加工[J];機械工藝師;1986年05期

6 楊鐘勝;;大型機床剖分式動壓軸承的修理工藝及常見故障[J];機械制造;1989年10期

7 趙朋;鬲雪艾;胡娟;劉永新;;剖分式薄壁銅套的加工方法[J];金屬加工(冷加工);2009年11期

8 蔡津;;剖分式凸輪[J];機械制造;1983年11期

9 馬再安;剖分式主軸瓦的再生利用[J];設(shè)備管理與維修;1994年10期

10 張園;楊啟明;;一種新型釜用剖分式機械密封裝置設(shè)計[J];化工機械;2009年02期

相關(guān)會議論文 前1條

1 陳傳兵;劉業(yè)新;;剖分式油封在生產(chǎn)中的應(yīng)用[A];2007年中小高爐煉鐵學(xué)術(shù)年會論文集[C];2007年

相關(guān)博士學(xué)位論文 前1條

1 劉志衛(wèi);多層交錯剖分式超高壓模具設(shè)計及其數(shù)值模擬[D];吉林大學(xué);2014年

相關(guān)碩士學(xué)位論文 前2條

1 陳碧鳳;反應(yīng)釜用剖分式機械密封機理分析及設(shè)計[D];西南石油大學(xué);2007年

2 常寶華;ZP495型轉(zhuǎn)盤錐齒圈剖分式聯(lián)接設(shè)計與分析[D];蘭州理工大學(xué);2014年

本文編號：1908033