機(jī)械密封培訓(xùn)ppt課件.ppt

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1、西部管道密封培訓(xùn)JohnCraneTech(Tianjin)Co.,Ltd培訓(xùn)內(nèi)容概述密封基礎(chǔ)知識(shí)密封系統(tǒng)知識(shí)密封的安裝要求密封的失效大致判斷與客戶技術(shù)人員進(jìn)行交流機(jī)械密封基礎(chǔ)第一部分ConceptsofMechanicalSeals機(jī)械密封概念ShaftProcessFluid密封流體Leakage泄漏Environment環(huán)境VesselWall釜壁TheBasicSealingProblem:PreventingLeakage基本的密封問題:防止泄漏ShaftProcessFluid流體流動(dòng)Le

2、akage泄漏Environment環(huán)境VesselWall釜壁TheConceptofanEndFaceMechanicalSeal機(jī)械密封端面的概念ShaftMovement軸的運(yùn)動(dòng)RequiredFeatures必須的特征Smallaxialclearance小的軸向間隙Selfadjusting自調(diào)節(jié)MatingRing配合環(huán)PrimaryRing補(bǔ)償環(huán)SecondarySealingElement輔助密封AFlexibleSealFlexible機(jī)械密封Hydrostaticloading流體

3、靜力學(xué)負(fù)荷Secondarysealingelements輔助密封Replaceableparts可替換的部件O-RingO型圈Shaft軸MatingRing配合環(huán)PrimaryRing補(bǔ)償環(huán)SnapRing卡環(huán)Anti-XRing擋環(huán)O-RingO型圈Disk推環(huán)Springs彈簧Retainer傳動(dòng)套SetScrew定位螺絲AnExampleofaCompleteSealSimplyput,amechanicalsealis:簡(jiǎn)單的說,機(jī)械密封就是:1.Awearable,stationary,pr

4、imarysealingelement一個(gè)耐磨,靜止的密封件2.Awearable,rotating,primarysealingelement一個(gè)耐磨,旋轉(zhuǎn)的密封件3.Asecondarysealingelement二次密封4.Amechanicalloadingdevicetopressprimarysealingelements1and2againstoneanother,and使件1和件2相互貼合的機(jī)械裝置5.Auxiliarycomponentstocompleteseal輔助密封Non-flas

5、hing沒有閃蒸Flashing閃蒸Parallel平行Converging收斂Diverging發(fā)散FaceSeparation密封面分離Shape:形態(tài)Gap:間隙Fluid:流體TheSealingInterface密封接觸面Lubricant潤滑劑Separation分離面MagnifiedSurfaceA放大面MagnifiedSurfaceB放大面Heat熱量TheSealingInterface密封面LubricationPurpose:潤滑目的Separatesurfaces分離兩個(gè)面Pre

6、ventcontactofhighsurfacepoints防止出現(xiàn)面接觸Reducefriction/heatgeneration減少摩擦/生熱ProcessFluidActsasLubricantBetweenFaces流體在兩個(gè)面之間充當(dāng)潤滑劑的過程Gland密封端蓋PumpHousing泵腔ProcessFluid工藝流體InvisibleLeakage:不可見泄漏FluidEvaporatesUponReachingAtmosphere微量的泄漏在大氣側(cè)蒸發(fā)PrimaryRing補(bǔ)償環(huán)Mating

7、Ring配合環(huán)Gland密封端蓋PumpHousing泵腔NoFluidOrDryRunning沒有流體或者干運(yùn)轉(zhuǎn)PrimaryRing補(bǔ)償環(huán)MatingRing配合環(huán)WithoutLubrication,FacesRunDryAndOverheat沒有潤滑干運(yùn)轉(zhuǎn)導(dǎo)致過熱MatingRing配合環(huán)PrimaryRing補(bǔ)償環(huán)HeatGeneration生熱Rubbing摩擦ViscousShear粘性剪切力HeatTransfer熱傳遞Conduction傳導(dǎo)Convection對(duì)流Injection注入F

8、lushing冷沖洗RemovesHeat帶走熱量ReplenishesCoolCleanLubricatingLiquid補(bǔ)充潤滑液PrimarySeal:Flush基本密封:沖洗SingleSealFlushingBy-PassfromDischarge(APIPlan11)單密封通過出口進(jìn)行沖洗By-passLinefromPumpDischargetoSealGland從泵出口到密封端蓋的管線Disch