qhov twg mechanical seal

Sab hauv thiab sab nraud mounting seals raug cais raws li kev teeb tsa, raws li pom hauv daim duab 1.

Feem ntau cov ntsaws ruaj ruaj yog ib qho ntsaws ruaj ruaj. Lub foob ib leeg tuaj yeem ntsia tau rau sab hauv lossis sab nraum cov txheej txheem dej.

 

 

 

 

 

 

Daim duab 1: Kev sib foob (sab laug rau sab hauv mounting foob, txoj cai rau sab nraud mounting foob)

Internally mounted seals yog qee zaum piav lossis txawm tias txhais tau tias tau teeb tsa hauv thaj tsam ntawm lub sealing chamber. Qhov no txhais tau hais tias cov txheej txheem ua kua muaj nyob rau ntawm sab nraud ntawm lub foob. Sab hauv mounted foob yog ib qho yooj yim kom txias thiab tuaj yeem kaw cov kua dej siab. Cov kev taw qhia ntawm cov dej xau yog los ntawm sab nraud ntawm lub sealing nto mus rau sab hauv txoj kab uas hla (saib daim duab sab laug hauv daim duab 1), thiab lub zog centrifugal tuaj yeem tiv thaiv kom tawg. Internally-installed foob yog nyob deb ntawm qhov nrov tshaj plaws.

 

Externally mounted seals yog qee zaum piav lossis txhais tau tias yog nyob sab nraum cov ciam teb ntawm lub sealing chamber. Yog li ntawd, cov txheej txheem cov kua dej yog tam sim no nyob rau hauv txoj kab uas hla ntawm lub foob, thiab lub sab nraud mounted foob muaj tsawg heev kev sib cuag nrog cov txheej txheem kua. Cov kev taw qhia ntawm kev xau yog los ntawm sab hauv txoj kab uas hla ntawm lub sealing nto mus rau sab nraud txoj kab uas hla (saib daim duab zoo hauv daim duab 1), uas yog tib qho kev taw qhia raws li lub zog centrifugal, yog li cov ntsaws ruaj ruaj sab nraud feem ntau xau ntau dua li cov ntsaws ruaj ruaj sab hauv.

 

Lub tswv yim ntawm sab hauv thiab sab nraud mounting tuaj yeem txuas mus rau cov ntsaws ruaj ruaj sab nraud hauv kev sib khi dual. Ntawd yog, lub foob sab nraud yog ntsia sab hauv lossis sab nraud nrog kev hwm rau lub sealing chamber thiab spacer / tsis.

 

Qhov cuam tshuam ntawm lub zog centrifugal ntawm kev xau yog qhov tseeb, tab sis feem ntau ntawm qhov loj me thiab feem ntau tsis quav ntsej hauv kev suav.

Ob qho tib si sab hauv thiab sab nrauv tuaj yeem tsim nrog qhov sib npaug sib npaug kom lub sealing nto kaw. Txawm li cas los xij, qee zaum cov ntsaws ruaj ruaj uas tau tsim tiag tiag rau kev teeb tsa sab hauv tsuas yog siv cov ntsaws ruaj ruaj rau kev teeb tsa sab nraud, thiab qhov sib npaug ntawm qhov sib npaug yuav tsis tsim nyog. Cov ntawv thov no tsuas yog siv tau thaum muaj kev kub ntxhov heev.

 

API 682 tus qauv yog hais txog sab hauv-mounted sealing, tab sis lub sij hawm tau hloov mus rau "internally mounted".

1) Nyob rau hauv thawj tsab ntawv, txheem seals teem 1, 2 thiab 3 nyob rau hauv cov nqe lus 2.1.2, 2.1.5 thiab 2.1.6 yog piav raws li "internally mounted". Nws yog txhob txwm thiab tsis xav tau los tham. Tsis muaj leej twg xav tau "sab nraud mounted" foob.

2) Hauv 2nd thiab 3rd edition, cov lus txhais rau hom A, B thiab C seals piav txog lawv li "internally mounted".

3) Hauv Version 4, hom A, B thiab C cov ntsaws ruaj ruaj tau raug xaiv los ua "internally mounted" hauv Clause 4.1.3.

 

Qhov zoo ntawm internal mounted seals muaj xws li:

1) Lub sealing nto tuaj yeem ua kom txias tau zoo los ntawm kev yaug lub taub sab nraud

2) Kev tswj ntawm ib puag ncig sab hauv ntawm lub sealing chamber ncaj qha ua rau lub sealing

3) Lub zog centrifugal yog qhov zoo los tiv thaiv kev sib tsoo

4) Lub foob tuaj yeem ua ke rau hauv lub caj pas

5) Kev sib hloov pab kom cov khib nyiab hnyav kom deb ntawm qhov chaw sib khi

 

Disadvantages ntawm internal installation muaj xws li:

1) Cov cuab yeej yuav tsum tau disassembled thiaj li yuav txhim kho lub foob

2) Tej zaum yuav nyuaj rau kev txhim kho, tshwj xeeb tshaj yog nyob rau hauv cov ntaub ntawv ntawm cov qauv tsis muaj

3) Tag nrho / feem ntau cov ntaub ntawv siv yuav tsum yog corrosion resistant rau txheej txheem kua

4) Lub sealing chamber yuav tsum muaj qhov chaw sealing txaus

Qhov zoo ntawm sab nraud mounted seals muaj xws li:

1) Ib qho yooj yim rau nruab, tshwj xeeb tshaj yog tsim rau cov qauv tsis ntim khoom

2) Lub foob tuaj yeem pom ncaj qha thaum lub sijhawm ua haujlwm (ceev faj!)

3) Kho lub foob yam tsis tau tshem cov khoom siv (ceev faj!)

4) Tsawg raug rau corrosive txheej txheem kua

5) Feem ntau yog siv rau phua mechanical seals

 

Disadvantages ntawm sab nraud installation muaj xws li:

1) Kev hloov hluav taws xob tsis zoo txwv tsis pub siv cov ntsaws ruaj ruaj nyob rau hauv qis ceev thiab tsis tshua muaj siab

2) Kev tswj cov dej ntws tuaj yeem nyuaj

-----Los ntawm Bengguanjia