Taug qab keeb kwm ntawm non eccentric npauj npaim valve thiab ib qho eccentric npauj npaim valve

Tsis eccentric npauj npaim valve:

Cov yam ntxwv ntawm cov npauj npaim uas tsis yog eccentric npauj npaim valve (los yog concentric npauj npaim valve) yog tias lub qia axis, npauj npaim phaj chaw thiab lub cev nruab nrab yog nyob rau hauv tib txoj hauj lwm. Cov qauv yog yooj yim thiab kev tsim khoom yog yooj yim. Hom roj hmab lined npauj npaim valve belongs rau hom no. Qhov tsis zoo yog tias tus npauj npaim phaj thiab lub rooj zaum valve yeej ib txwm nyob rau hauv lub xeev ntawm extrusion, scraping, loj kuj nyob deb thiab ceev ceev. Yuav kom kov yeej extrusion, scraping thiab xyuas kom meej sealing kev ua tau zoo, lub rooj zaum valve yog tsim los ntawm cov ntaub ntawv elastic xws li roj hmab los yog polytetrafluoroethylene, tab sis nws kuj raug txwv los ntawm kev siv kub. Qhov no yog vim li cas ib txwm neeg xav tias npauj npaim valve tsis tiv taus kub.

Nrog cov tsos ntawm cov roj hmab ntuj thiab cov tsos ntawm cov khoom siv roj hmab hauv xyoo 1950, cov roj hmab hauv ob sab hauv tau pib siv los ua cov khoom sib khi. Tus npauj npaim valve thaum ntxov yog tsis eccentric npauj npaim valve, thiab cov roj hmab kab npauj npaim valve yog ib qho ntawm lawv.

Cov yam ntxwv nta: lub qia axis, npauj npaim phaj chaw thiab lub cev lub cev nyob rau hauv tib txoj hauj lwm (raws li qhia hauv daim duab).

Qhov zoo: cov qauv yooj yim, vim hais tias ob sab ntawm cov kab nruab nrab ntawm lub phaj npauj npaim yog sib npaug, lub zog thiab lub zog ntawm lub phaj npauj npaim yog sib npaug, kom lub npauj npaim valve tuaj yeem ua tiav ob txoj kev kaw ntom ntom thaum kaw, tsis muaj thaj chaw tsis sib npaug, thiab qhov unilateral to yog txo.

Disadvantages: vim hais tias nws yog ib tug symmetrical qauv nyob rau hauv lub axis ntawm kev sib hloov. Nws sealing nto yog nyob rau ntawm ob sab ntawm lub ncej. Nyob rau hauv cov qauv no, tsuas yog ib nrab ntawm lub valve phaj yog ua raws li lub siab ntawm lub sealing nto thiab nruab nrab, thiab ib nrab yog nyob rau hauv lub opposite kev taw qhia. Yog li ntawd, lub sealing kev ua tau zoo ntawm npauj npaim valve yog tsis siab, uas yog hais tias, nws sealing kev ua tau zoo yog kiag li nyob ntawm qhov kev cuam tshuam thawj zaug ntawm lub sealing nto.

Ib qho eccentric npauj npaim valve:

Yuav kom daws tau qhov teeb meem extrusion ntawm tus npauj npaim phaj thiab lub rooj zaum ntawm cov npauj npaim concentric valve, ib qho eccentric npauj npaim valve yog tsim. Nws cov yam ntxwv tshwj xeeb yog tias lub axis ntawm lub valve qia deviates los ntawm qhov nruab nrab ntawm lub phaj npauj npaim, kom lub sab sauv thiab qis kawg ntawm tus npauj npaim phaj tsis dhau los ua kev sib hloov axis, uas disperses thiab txo cov extrusion ntau dhau ntawm sab sauv thiab qis kawg ntawm tus npauj npaim phaj thiab lub rooj zaum valve. Txawm li cas los xij, vim yog ib qho eccentric qauv nyob rau hauv tag nrho cov txheej txheem ntawm lub valve qhib thiab kaw, lub scraping tshwm sim ntawm npauj npaim phaj thiab lub rooj zaum valve tsis ploj, thiab nws daim ntawv thov tau zoo ib yam li cov concentric npauj npaim valve, yog li nws tsis tshua muaj. siv.

Nyob rau hauv thaum ntxov sixties, qhov tshwm sim no tau raug kho los ntawm staggering lub nruab nrab kab ntawm lub valve qia thiab lub hauv paus kab ntawm lub foob, thiaj li tsis mus dhau los ntawm lub sealing nto ntawm cov roj hmab liner, yog li tsim ib tug eccentric npauj npaim valve.

Cov yam ntxwv nta: lub axis ntawm lub valve qia deviates los ntawm qhov chaw ntawm npauj npaim valve, raws li qhia hauv daim duab.

Qhov zoo: cov kab hauv nruab nrab ntawm lub qia thiab cov kab sib txuas yog staggered los tsim cov qauv asymmetric kom lub sealing nto ntawm npauj npaim valve yog ua tiav thiab nruam ncig arc nto tsis dhau cov roj hmab hauv ob sab phlu sealing nto. Qhov no yog qhov yooj yim heev rau kev ua thiab kev tsim cov sealing nto, thiab lub phaj valve thiab lub rooj zaum valve tuaj yeem ua hauv av, uas muaj kev lees paub txaus rau kev sib khi ua haujlwm ntawm npauj npaim valve. Qhov ob-point sealing teeb meem ntawm valve qia los ntawm ob sab yog daws. Lub sab sauv thiab qis kawg ntawm npauj npaim phaj tsis yog ib qho axis rotating, uas disperses thiab txo cov extrusion ntau dhau ntawm lub sab sauv thiab qis kawg ntawm tus npauj npaim phaj, tuaj yeem tawm ntawm qhov sib khi sai thiab txo qhov kev sib txhuam ntawm mating nto.

Qhov tsis zoo: vim tias qhov tshwm sim ntawm qhov tshwm sim ntawm npauj npaim phaj thiab lub rooj zaum valve tsis ploj mus rau tag nrho cov txheej txheem ntawm lub valve hloov ntawm ib qho eccentric qauv, nws tsis siv ntau.