Nzira yekuita sei chisimbiso chakavimbika che-high-pressure tube fittings neO-ring seals?

O-ring

Zvose SAE flange zvisimbiso uye O-ring end seals zvakanamwa neO-rings. Aya mafirita anowanzo shandiswa mumashandisirwo ane yakanyanya kudzvanywa uye zvinodikanwa zvekuvimbika zvemichina zvemuchina zvakare zvakakwirira kwazvo. Izvi zviitiko zvekushandisa zvinowanzova static pressure seals. Tingaite sei kuti tive nechokwadi chekuvimbika kweO-ring seals

Iyo yekuisa chisimbiso yeO-mhete inoshandiswa mu static pressure sealing

Mushure mekunge O-ring yaiswa mugomba rekuisa chisimbiso, chikamu chayo chemuchinjiko chinoiswa pasi pekumanikidzwa kwekubata, zvichikonzera kushanduka kwe elastic, uye inogadzira yekutanga kusangana kudzvanywa P0 pane yekubata kumeso. Kunyangwe pasina kudzvanywa kwepakati kana nekumanikidzwa kushoma, iyo O-ring inogona kuwana chisimbiso ichivimba neyayo elastic kumanikidza. Kana iyo mhango yakazadzwa neyakamanikidzwa svikiro, pasi pekuita kwepakati-kumanikidzwa, iyo O-ring inofamba ichienda kune yakaderera-kudzvinyirira divi, uye elastic yayo inowedzera kuwedzera, kuzadza nekuvhara gap. Pasi pechiito chepakati pekumanikidza, iyo yekubata kumanikidza Pp inotumirwa kune yekuita nzvimbo neO-mhete inowedzera kuita pane yekubata kumeso kweiyo yekuisa chisimbiso kuPm.

Kumanikidzwa kwekutanga panguva yekuiswa kwekutanga

Iyo yepakati pressure inofambiswa kuburikidza neO-ring.

Kuumbwa kwekumanikidzwa kwekubatana

Kutora chiso-chisimbiso cheO-ring chubhu chakakodzera semuenzaniso, kurukurai zvinhu zvinokanganisa kuiswa chisimbiso kwechubhu fitting.

Kutanga, chisimbiso chinofanira kuva nehumwe huwandu hwekuisa compression. Paunenge uchigadzira saizi yeO-ring chisimbiso uye groove, kumanikidza kwakakodzera kunofanirwa kutariswa. Iyo yakajairwa O-mhete chisimbiso saizi uye inoenderana groove saizi zvakatotsanangurwa mumayero, saka unogona kusarudza zvinoenderana nezviyero.

Iko kushata kwepamusoro kwechisimbiso groove hakufanirwe kunge kwakakurisa, kazhinji Ra1.6 kusvika Ra3.2. Iyo yakakwirira yekumanikidza iyo yakaderera iyo roughness inofanira kuva.

Nokuda kwekuvhara kwepamusoro-soro, kuitira kuti chisimbiso chirege kubudiswa kunze kwegomba uye kukonzera kukundikana, gomba rinofanira kuva duku. Naizvozvo, zvinodikanwa kuve nechokwadi cheflatness uye roughness yekubata kumeso pane yakaderera-kudzvanywa kwechisimbiso. Iyo flatness inofanira kunge iri mukati me 0.05mm, uye roughness inofanira kunge iri mukati meRa1.6.

Panguva imwecheteyo, sezvo chisimbiso cheO-ring chichitsamira pakumanikidzwa kwemvura kuendesa kumanikidza kune O-ring chisimbiso uyezve kune nyuchi kubata, panofanirwa kuve paine imwe gap padivi rekudzvanya kwechisimbiso, iro riri. kazhinji pakati pe0 ne0.25 mm.