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Saamaynta Viscosity Dhexdhexaad ee Waxqabadka Bamka Centrifugal Erayga Muhiimka ah: Bamka Bartamaha, Viscosity, Qodobka Saxitaanka, Khibrada Codsiga

Hordhac

Warshado badan, bambooyin centrifugal ah ayaa badanaa loo isticmaalaa in lagu qaado dareeraha viscous.Sababtan awgeed, waxaan inta badan la kulannaa dhibaatooyinka soo socda: waa imisa viscosity ugu badan ee bamka centrifugal uu xamili karo;Waa maxay viscosity ugu yar ee u baahan in lagu saxo waxqabadka bamka centrifugal.Tani waxay ku lug leedahay cabbirka bamka (qulqulka bamka), xawaaraha gaarka ah (xawaaraha hoose ee gaarka ah, weynaanta luminta diskka), codsiga (shuruudaha cadaadiska nidaamka), dhaqaalaha, ilaalinta, iwm.
Maqaalkani wuxuu si faahfaahsan u soo bandhigi doonaa saameynta viscosity ee waxqabadka bamka centrifugal, go'aaminta isku-dhafka sixitaanka viscosity, iyo arrimaha u baahan fiiro gaar ah ee codsiga injineernimada wax ku oolka ah oo ay weheliso heerarka la xiriira iyo khibrada injineernimada, tixraaca kaliya.

1. viscosity ugu badan ee bamka centrifugal uu xamili karo
Tixraacyada ajaanibka qaarkood, xadka ugu badnaan viscosity ee uu matoorka centrifugal uu qaban karo waxaa loo dejiyay 3000 ~ 3300cSt (centisea, oo u dhiganta mm ²/ s).Arrinkan, CE Petersen waxa uu haystay warqad farsamo oo hore (oo lagu daabacay shirkii Ururka Tamarta Baasifiga ee Sebtembar 1982) wuxuuna soo bandhigay dood ah in viscosity-ka ugu badan ee bamka centrifugal uu xamili karo lagu xisaabin karo cabbirka bamka nozzle, sida ku cad Formula (1):
Vmax=300(D-1)
Halkee, Vm waa ugu badnaan la oggol yahay kinematic viscosity SSU (Saybolt viscosity universal) ee bamka;D waa dhexroorka biibiile ka soo baxa bamka (inji).
Ku dhaqanka injineernimada wax ku oolka ah, qaaciidadan waxaa loo isticmaali karaa sida qaanuunka suulka tixraac ahaan.Aragtida iyo Naqshadeynta Casriga ah ee Guan Xingfan ayaa qaba in: guud ahaan, bamka bamka uu ku habboon yahay gudbinta viscosity ka yar 150cSt, laakiin bambooyin centrifugal ah oo leh NPSHR oo aad uga yar NSHA, waxaa loo isticmaali karaa viscosity of 500 ~ 600cSt;Marka viscosity-ku ka weyn yahay 650cSt, waxqabadka bamka centrifugal aad ayuu hoos u dhacayaa oo kuma habboona in la isticmaalo.Si kastaba ha ahaatee, sababtoo ah bamka centrifugal waa mid joogto ah oo garaaca marka la barbar dhigo bamka mugga, oo uma baahna waalka badbaadada iyo nidaaminta socodka waa mid sahlan, sidoo kale waa caadi in la isticmaalo bambooyin centrifugal ah wax soo saarka kiimikada halkaasoo viscosity gaaro 1000cSt.Viscosity codsiga dhaqaale ee bamka centrifugal badanaa wuxuu ku kooban yahay ilaa 500ct, taas oo inta badan ku xiran xajmiga iyo codsiga bamka.

2. Saamaynta viscosity ee waxqabadka bamka centrifugal
Cadaadiska lumay, is jiid-jiidka impeller iyo luminta dareeraha gudaha ee mareenka mareenka iyo hagaha socodka socodka vane/volutiga ee bamka centrifugal waxay inta badan ku xidhan tahay viscosity dareeraha la bamgareeyay.Sidaa darteed, marka dareeraha lagu shubo viscosity sare, waxqabadka lagu go'aamiyay biyaha ayaa lumin doona waxtarkiisa Mawduuca dhexdhexaadka ah wuxuu saameyn weyn ku leeyahay waxqabadka bamka centrifugal.Marka la barbar dhigo biyaha, kororka viscosity ee dareeraha, waa badan yahay socodka iyo luminta madaxa ee bamka la siiyay xawaare la siiyay.Sidaa darteed, barta waxtarka ugu fiican ee bamka ayaa u dhaqaaqi doonta socodka hoose, socodka iyo madaxa ayaa hoos u dhici doona, isticmaalka korantadu wuu kordhi doonaa, waxtarkuna wuu yaraan doonaa.Inta badan suugaanta gudaha iyo dibedda iyo heerarka iyo sidoo kale khibrada ku dhaqanka injineernimada ayaa muujinaya in viscosity uu saameyn yar ku leeyahay madaxa barta xiritaanka bamka.

3. Go'aaminta isku xidhka sixitaanka viscosity
Marka viscosity-ku dhaafo 20cSt, saamaynta viscosity ee waxqabadka bamka ayaa muuqda.Sidaa darteed, codsiyada injineernimada wax ku oolka ah, marka viscosity gaaro 20cSt, waxqabadka bamka centrifugal wuxuu u baahan yahay in la saxo.Si kastaba ha ahaatee, marka viscosity uu ku jiro inta u dhaxaysa 5 ~ 20 cSt, waxqabadkiisa iyo awoodda isbarbardhigga matoorka waa in la hubiyaa.
Markaad bamgareyso dhexdhexaadinta viscous, waxaa lagama maarmaan ah in la beddelo qalooca sifada marka biyaha la shubayo.
Waqtigan xaadirka ah, jaantusyada, jaantusyada iyo tillaabooyinka sixitaanka ee ay qaateen halbeegyada gudaha iyo dibedda (sida GB/Z 32458 [2], ISO/TR 17766 [3], iwm.) ee cabitaannada viscous asal ahaan waxay ka soo jeedaan heerarka Haydarooliga Mareykanka Machadka.Marka waxqabadka dhexdhexaadiyaha gudbinta bamka loo yaqaano inuu yahay biyo, heerka ANSI/HI9.6.7-2015 [4] wuxuu bixiyaa tillaabooyinka sixitaanka oo faahfaahsan iyo hababka xisaabinta ee khuseeya.

4. Khibrada codsiga injineernimada
Tan iyo markii la sameeyay bambooyin centrifugal ah, kuwii ka horreeyay ee warshadaha bamka ayaa soo koobay habab kala duwan si wax looga beddelo waxqabadka matoorada centrifugal ee biyaha ilaa warbaahinta viscous, mid kasta oo leh faa'iidooyin iyo faa'iido darrooyin:
4.1 Model AJStepanoff
4.2 Habka Paciga
4.3 Machadka Haydarooliga ee Maraykanka
4.4 Jarmalka Habka KSB

5.Taxaddar
5.1Warbaahinta lagu dabaqi karo
Shaxda beddelka iyo qaacidada xisaabinta ayaa kaliya lagu dabaqi karaa dareeraha viscous-ka ah, kaas oo caadi ahaan loo yaqaan dareeraha Newtonian (sida saliidda saliidda), laakiin aan ahayn dareeraha Newtonian (sida dareeraha leh fiber, kareem, saxarka, dareeraha isku dhafka biyaha dhuxusha, iwm. .)
5.2 Socodka lagu dabaqi karo
Akhrisku maaha wax la taaban karo.
Waqtigan xaadirka ah, qaaciidooyinka sixitaanka iyo jaantusyada gudaha iyo dibaddaba waa xog kooban oo la taaban karo, kuwaas oo lagu xaddidi doono xaaladaha imtixaanka.Sidaa darteed, codsiyada injineernimada wax ku oolka ah, waa in fiiro gaar ah la siiyaa: habab kala duwan oo hagaajin ah ama jaantusyo waa in loo adeegsadaa kala duwanaanshaha socodka kala duwan.
5.3 Nooca bamka lagu dabaqi karo
Qaababka iyo jaantusyada la bedelay ayaa kaliya lagu dabaqi karaa matoorada centrifugal ee leh nashqad haydarooliga caadiga ah, furayaasha furan ama xiran, oo ka shaqeeya meel u dhow meesha ugu waxtarka badan (halkii ay ka ahaan lahaayeen dhamaadka fog ee qalooca bamka).Bambooyin si gaar ah loogu talagalay dareerayaasha viscous ama kala duwani ma isticmaali karaan hababkan iyo jaantusyadan.
5.4 Xadka badbaadada cavitation ee lagu dabaqi karo
Marka lagu shubayo dareeraha leh viscosity sare, NPSHA iyo NPSH3 ayaa looga baahan yahay inay lahaadaan xad ku filan oo badbaadada cavitation, taas oo ka sarraysa midda lagu qeexay heerarka iyo qeexitaannada qaarkood (sida ANSI/HI 9.6.1-2012 [7]).
5.5 kuwa kale
1) Saamaynta viscosity ee waxqabadka bamka centrifugal way adagtahay in lagu xisaabiyo qaacido sax ah ama lagu hubiyo jaantus, waxaana lagu bedeli karaa oo kaliya qalooca laga helay tijaabada.Sidaa darteed, codsiyada injineernimada wax ku oolka ah, marka la dooranayo qalabka wadista (xoog leh), waa inay tixgelisaa inay xafido xad badbaado ku filan.
2) dareerayaasha leh viscosity sare heerkulka qolka, haddii bamka (sida bamka heerkulka-sare ee unugga dildilaaca catalytic ee sifeeyaha) lagu bilaabo heerkul ka hooseeya heerkulka caadiga ah ee shaqada, naqshadeynta farsamada ee bamka (sida xoogga shafka bamka) iyo xulashada wadista iyo isku xirka waa in ay tixgeliyaan saameynta qulqulka ee ay keento kororka viscosity.Isla markaana, waa in la ogaadaa in:
① Si loo dhimo dhibcaha daadsan (shilalka suurtagalka ah), bamka cantalever-ka hal-heer ah waa in la isticmaalaa intii suurtogal ah;
② Qolfoofka bamka waa in lagu qalabeeyaa jaakada dahaarka ama qalabka raadraaca kulaylka si looga hortago adkeyn dhexdhexaad ah inta lagu jiro xiritaanka muddada gaaban;
③ Haddii wakhtiga xidhiddu uu dheer yahay, dhexdhexaadka qolofka ku jira waa in la faaruqiyaa oo la nadiifiyaa;
④ Si looga hortago in bamka uu adkaado in la kala diro sababtoo ah adkeynta dhexdhexaadka viscous heerkulka caadiga ah, xirmooyinka ku yaala guryaha bamka waa in si tartiib ah loo dabciyaa ka hor inta heerkulka dhexdhexaadku hoos u dhigin heerkulka caadiga ah (fiiri ilaalinta shaqaalaha si aad uga fogaato gubasho). ), si jidhka bamka iyo daboolka bamka loo kala saaro si tartiib tartiib ah.

3) Bambo leh xawaare gaar ah oo gaar ah waa in la doortaa inta suurtogalka ah si loo qaado dareeraha viscous, si loo yareeyo saameynta dareeraha viscous ee waxqabadkiisa oo loo hagaajiyo waxtarka bamka viscous.

6. Gabagabo
Viscosity ee dhexdhexaadka ah ayaa saameyn weyn ku leh waxqabadka bamka centrifugal.Saamaynta viscosity ee waxqabadka bamka centrifugal way adagtahay in lagu xisaabiyo qaacido sax ah ama lagu hubiyo jaantuska, markaa habab ku habboon waa in la doortaa si loo saxo waxqabadka bamka.
Kaliya marka la ogaado viscosity dhabta ah ee dhexdhexaadiyaha bamka, si sax ah ayaa loo dooran karaa si looga fogaado dhibaatooyin badan oo goobta ah oo ay sababto farqiga weyn ee u dhexeeya viscosity-ka la bixiyay iyo viscosity dhabta ah.


Waqtiga boostada: Dec-27-2022