機(jī)械密封高級培訓(xùn)教程

AESSEAL?

高級培訓(xùn)教程PRESENTEDBYA.E.S.ChinaEngineeringLtd.Question-Howmuchdoeswaterreallycostyou?

數(shù)量1drop/sec2drop/secSmallstream1/16”stream1/8”stream3/16”stream1/4”stream

體積/時間34USgalls/month100usgalls/month700USgalls/month2,500USgalls/month7,800USgalls/month12,750USgalls/month27,750USgalls/month泄漏＝金錢損失Copyright1997A.E.S.EngineeringLtd.泵的基本結(jié)構(gòu)油封軸軸承壓蓋泵座地腳螺栓密封腔體泵體葉輪葉輪螺母填料（機(jī)械密封）壓蓋軸承箱填料（機(jī)械密封）軸承Copyright1997A.E.S.EngineeringLtd.什么是機(jī)械密封？

機(jī)械密封也稱端面密封，其至少有一對垂直于旋轉(zhuǎn)軸線的端面，該端面在流體壓力及補償機(jī)械彈力的作用下，加之輔助密封的配合，與另一端面保持貼合并相對轉(zhuǎn)動，從而防止流體泄漏。Copyright1997A.E.S.EngineeringLtd.機(jī)械密封的組成A.由靜環(huán)和動環(huán)組成的一對密封端面，也稱摩擦副。B.以彈性元件為主的補償緩沖機(jī)構(gòu)（彈簧、波紋管）。C.輔助密封圈(O形、V形、橡膠皮碗等）D.使動環(huán)和軸一起旋轉(zhuǎn)的傳動機(jī)構(gòu)。E.其它零部件（軸套、壓蓋、定位銷、墊片等）Copyright1997A.E.S.EngineeringLtd.為什么要使用機(jī)械密封

密封性能好使用壽命長軸或軸套無磨損軸功率消耗小不需經(jīng)常調(diào)整應(yīng)用范圍廣機(jī)械密封分類單端面和雙端面內(nèi)裝式和外裝式平衡型與非平衡型彈簧內(nèi)置式和彈簧外置式彈簧式和波紋管式普通兩部件式和集裝式多（?。椈尚秃蛦危ù螅椈尚虲opyright1997A.E.S.EngineeringLtd.機(jī)械密封原理液膜的形成摩擦/熱雜質(zhì)/固體顆粒

工藝流體動環(huán)靜環(huán)密封腔體Copyright1997A.E.S.EngineeringLtd.軸什么是液膜?單端面密封工藝流體冷卻液

雙端面密封緩沖液（低壓）隔離液（高壓）Copyright1997A.E.S.EngineeringLtd.Copyright1997A.E.S.EngineeringLtd.端面干接觸/“干磨”過度磨損產(chǎn)生大量摩擦熱固體顆粒損壞端面如沒有液膜形成會發(fā)生什么?Copyright1997A.E.S.EngineeringLtd.提供潤滑防止端面直接接觸減少摩擦熱的生成防止固體顆粒損壞端面液膜能幫助我們做什么?

Copyright1997A.E.S.EngineeringLtd.工藝流體汽化/腐蝕率增加液膜的狀態(tài)發(fā)生改變/固體顆粒沉積摩擦熱帶來的后果減少或無法形成液膜Copyright1997A.E.S.EngineeringLtd.液膜汽化和固體顆粒形成機(jī)械密封成功的關(guān)鍵“形成并保持一種穩(wěn)定的液膜”Copyright1997A.E.S.EngineeringLtd.Copyright1997A.E.S.EngineeringLtd.最初的軸封—盤根缺點：泄漏量大（每分鐘約7滴)軸磨損嚴(yán)重軸功率損耗大經(jīng)常需要調(diào)整使用壽命短優(yōu)點：價格低廉安裝方便Copyright1997A.E.S.EngineeringLtd.第一代機(jī)械密封（分離式、非平衡型、單個大彈簧）優(yōu)點：初始價格較低

缺點：容易產(chǎn)生人為安裝誤差彈簧和介質(zhì)接觸易堵塞O形圈及動靜環(huán)材質(zhì)不過關(guān)動環(huán)受彈簧力不均端面比壓受介質(zhì)影響大使用壽命低Copyright1997A.E.S.EngineeringLtd.第二代機(jī)械密封（分離式、多彈簧）優(yōu)點：動環(huán)受彈簧力均勻價格較低缺點：同第一代機(jī)械密封Copyright1997A.E.S.EngineeringLtd.第三代機(jī)械密封（卡式或集裝式）優(yōu)點：無人為安裝誤差彈簧不與介質(zhì)接觸不會堵塞優(yōu)異的O形圈及動靜環(huán)材質(zhì)密封環(huán)有良好的補償性O(shè)形圈無磨損設(shè)計壽命3年缺點：初始價格較貴軸的磨損Copyright1997A.E.S.EngineeringLtd.軸的磨損Copyright1997A.E.S.EngineeringLtd.作用在機(jī)械密封上的主要力Copyright1997A.E.S.EngineeringLtd.徑向力軸向力軸徑ABCopyright1997A.E.S.EngineeringLtd.非平衡型密封FORCE&PRESSUREINCREASEAB200lbfA=8sq..in.B=4sq..in.

頂端壓強(qiáng)=200=25lbf/in2

8末端壓強(qiáng)=200=50lbf/in24Copyright1997A.E.S.EngineeringLtd.

壓強(qiáng)對比FORCE&PRESSUREDECREASEAB200lbf頂端壓強(qiáng)=200=50lbf

/in2

4末端壓強(qiáng)=200=25lbf

/in2

8A=4sq..in.B=8sq..in.

Copyright1997A.E.S.EngineeringLtd.壓強(qiáng)對比非平衡型機(jī)械密封=壓力梯度力=壓強(qiáng)

X面積實例:密封腔壓強(qiáng)=100PSI密封面積=2sq...in閉合力=2sq...inX100PSI=200lbs張開力=2sq...inX50PSI=100lbs

200lbs-100lbs=100lbs閉合力Copyright1997A.E.S.EngineeringLtd.工藝介質(zhì)動環(huán)靜環(huán)密封腔體軸平衡型密封=壓力梯度力=壓強(qiáng)

X面積實例:密封腔壓強(qiáng)=100PSI密封面積=1sq...in閉合力=1sqinX100PSI=100lbs張開力=2sq..inX50PSI=100lbs

100lbs-100lbs=0lbs閉合力Copyright1997A.E.S.EngineeringLtd.工藝介質(zhì)軸套動環(huán)靜環(huán)密封腔體軸為什么要采用平衡型機(jī)械密封密封的工藝介質(zhì)壓力較高減小PV值，降低端面比壓產(chǎn)生較少熱量減少端面磨損或變形減少轉(zhuǎn)矩真空密封降低軸功率損耗端面材質(zhì)選擇范圍廣Copyright1997A.E.S.EngineeringLtd.ASELECTIONOFAESSEAL’SFOLLOWCopyright1997A.E.S.EngineeringLtd.A.E.S.系列產(chǎn)品分類

動環(huán)組件

SAITMNCETMCSTM

靜環(huán)組件

L型T型USI型

泵用集裝式密封

●單端面泵用集裝式密封

ConvertorⅡTMSCUSITMCURCTMBi-MetalCURCTMSMSSTMCURETM

●雙端面泵用集裝式密封

CDSATMBi-MetalCDSATMDMSFTM●腔式泵密封

PCPSTM

●剖分式密封

RDSTM

Copyright1997A.E.S.EngineeringLtd.

●非金屬元件密封

FI-DSNMTML-SEALTMFI-DSNM-RTM攪拌器密封●密封組件

ESMTMNCMTMBuffer

CanisterTM

●攪拌器集裝式密封

CSMTMCDMTMCDMSCTMCSWIBTMDSWIBTMMixmasterⅣTMMixmasterⅤTMMixmasterⅥTM金屬波紋管密封系列

BSAITMBSIVTMBQFDTMBDQDTM

輔助系統(tǒng)

PUMPPACTMSSE10TMAS15TM

SAI?動環(huán)組件和L型靜環(huán)Copyright1997A.E.S.EngineeringLtd.SAI?動環(huán)組件和USI?型靜環(huán)Copyright1997A.E.S.EngineeringLtd.NCE?-應(yīng)用于非化學(xué)工況的外置式密封Copyright1997A.E.S.EngineeringLtd.—代替盤根的最佳集裝式密封Copyright1997A.E.S.EngineeringLtd.SCUSITM短型單端面集裝式機(jī)械密封Copyright1997A.E.S.EngineeringLtd.CURCTM單端面集裝式機(jī)械密封唇封迷宮式密封油封Copyright1997A.E.S.EngineeringLtd.一個壓蓋-3種選擇方式SMSSTM單端面整裝固定型集裝式機(jī)械密封

Copyright1997A.E.S.EngineeringLtd.CDSATM雙端面集裝式機(jī)械密封Copyright1997A.E.S.EngineeringLtd.Copyright1997A.E.S.EngineeringLtd.Bi-MetalCDSATM具備合金部件的雙端面集裝式機(jī)械密封RDSTM剖分式機(jī)械密封Copyright1997A.E.S.EngineeringLtd.Copyright1999A.E.S.EngineeringLtd.DMSFTM

雙端面整裝固定型集裝式密封

金屬波紋管系列密封Copyright2000A.E.S.EngineeringLtd.……...…….....IncreasesSealLife50%MoreBellows……………TM12

50%ExtraIndustryStandardCopyright1997A.E.S.EngineeringLtd.PCPSTM腔式泵系列密封Copyright1997A.E.S.EngineeringLtd.攪拌器系列密封

FLOWFLOWDualSealSealReturnPipeSealFeedPipeVesselCopyright1997A.E.S.EngineeringLtd.密封輔助系統(tǒng)系列Copyright1997A.E.S.EngineeringLtd.A.E.S.集裝式機(jī)械密封的基本結(jié)構(gòu)動環(huán)靜環(huán)靜環(huán)膠圈彈簧防轉(zhuǎn)銷釘定位環(huán)驅(qū)動螺釘唇封冷卻孔壓蓋壓蓋墊片彈簧套桶軸套軸套膠圈套筒膠圈補償環(huán)（以CURCTM為例）為什么要使用集裝式密封“集裝式機(jī)械密封已經(jīng)成為引導(dǎo)市場的潮流”

安裝簡便

提高了使用可靠性

適合于多種型式的泵

降低維修率，使用壽命長

增加了生產(chǎn)利潤C(jī)opyright1997A.E.S.EngineeringLtd.特點：密封端面的材質(zhì)Copyright1997A.E.S.EngineeringLtd.GlassFilledTeflon（填充聚四氟乙烯）Carbon（碳石墨）StainlessSteel（不銹鋼）Ceramic（陶瓷）ChromeOxide（氧化鉻）TungstenCarbide（碳化鎢）SiliconCarbide（碳化硅）硬端面的材質(zhì)硬度對比SiliconCarbideCeramicChromeOxideSolidTungstenCarbide10 =硬1 =軟Copyright1997A.E.S.EngineeringLtd.硬端面的材質(zhì)耐腐蝕性對比SiliconCarbideCeramicChromeOxideSolidTungstenCarbide4=Good1=PoorCopyright1997A.E.S.EngineeringLtd.硬端面的材質(zhì)散熱性對比SiliconCarbideSolidTungstenCarbideChromeOxideCeramic10=Good1=PoorCopyright1997A.E.S.EngineeringLtd.硬端面的材質(zhì)脆性對比ChromeOxideSolidTungstenCarbideCeramicSiliconCarbide4=Good1=Poor*ChoxonSSCopyright1997A.E.S.EngineeringLtd.端面組合動環(huán)Copyright1997A.E.S.EngineeringLtd.

適用的介質(zhì)石油類液體潤滑劑硅樹脂液體鹵化烴一些酸某些磷酸脂不適用的介質(zhì)Skydrol胺酮熱水熱蒸汽剎車液溫度適用范圍-20oCto+204oCViton?/Fluorocarbon橡膠Copyright1997A.E.S.EngineeringLtd.適用的介質(zhì)水一些石油產(chǎn)品不適用的介質(zhì)僅有限使用在低檔密封中Nitrile/BunaN橡膠適用溫度范圍-40oCto+105oCCopyright1997A.E.S.EngineeringLtd.Aflas?橡膠適用的介質(zhì)油和潤滑油熱水一些酸多種類型的溶劑液壓液不適用的介質(zhì)醚一些氯化溶劑酮醋酸氟利昂溫度適用范圍-30oCto+204oCCopyright1997A.E.S.EngineeringLtd.EPR橡膠適用的介質(zhì)剎車液熱水蒸汽腐蝕性介質(zhì)磷酸脂不適用的介質(zhì)石油流體潤滑劑適用溫度范圍-57oCto+150oCCopyright1997A.E.S.EngineeringLtd.Kalrez?橡膠適用的介質(zhì)幾乎所有化學(xué)品不適用的介質(zhì)4079(丙烯酸或乙烯酸)Certainmetalsactasacatalystandtendtocausede-polymerisation

適用溫度范圍-30oCto+306oC**Refersto4079-forhotwater/steamuse3018Copyright1997A.E.S.EngineeringLtd.環(huán)境控制組件密封腔蓋沖洗孔-API11/32冷卻孔-API62排放孔-API13Copyright1997A.E.S.EngineeringLtd.密封腔蓋環(huán)境Copyright1997A.E.S.EngineeringLtd.雙端面密封DOUBLE-APIPLAN53

高壓隔離液TANDEM-APIPLAN52

低壓緩沖液Copyright1997A.E.S.EngineeringLtd.11Bar10Bar內(nèi)端11Barg-10Barg=1Bar11Bar0Bar外端11Barg-0Barg=11Barg介質(zhì)壓力雙端面機(jī)械密封內(nèi)外端壓力差別面對面密封“WHATPRICESAFETY???”Copyright1997A.E.S.EngineeringLtd.具有節(jié)流套的沖洗結(jié)構(gòu)APIPLAN32APIPLAN11Copyright1997A.E.S.EngineeringLtd.APIPLAN11APIPLAN32不具有節(jié)流套的沖洗結(jié)構(gòu)Copyright1997A.E.S.EngineeringLtd.冷卻液由外部提供，通常采用加裝一只貯液罐的形式APIPLAN62冷卻Copyright1997A.E.S.EngineeringLtd.Tosuctionorcasingvent正確的泄放口安裝方式APIPLAN13CASINGVENTCopyright1997A.E.S.EngineeringLtd.APIPLAN13CASINGVENT不正確的泄放口安裝方式Copyright1997A.E.S.EngineeringLtd.流體流體壓力調(diào)節(jié)閥壓力測量流量控制閥密封檢測裝備外部供給排出Copyright1997A.E.S.EngineeringLtd.FLOW流向雙端面密封密封測試系統(tǒng)回流管流入管器皿密封和罐的水平距離不超過1m密封和罐的垂直距離不超過0.7m

Copyright1997A.E.S.EngineeringLtd.SSESYSTEMP1

緩沖液系統(tǒng)

CODEVSE/SP01Copyright1997A.E.S.EngineeringLtd.SSESYSTEMP2

基本壓力系統(tǒng)