Ndezvipi zvinotarisirwa pakusarudza O-ring?

Mukushandiswa kweO-mhete, mamiriro chaiwo ekushanda uye mamiriro ekushandiswa anoda kutariswa.Tembiricha uye kumanikidza kuchava nemhedzisiro uye kurasikirwa paO-ring chisimbiso.Naizvozvo, zvinotevera 5 mapoinzi anofanirwa kutariswa mukushandiswa kweO-ring rubber seals:

1. Mamiriro ekushanda uye ekushanda;

2. Kuenderana kwechigadzirwa nechisviniro chekushanda, uye wobva wafunga kumanikidzwa, tembiricha, nguva yekushanda inoramba ichishanda, kutenderera kwekushanda uye mamwe mamiriro pachisimbiso, uye kukwira kwekushisa kunokonzerwa nekukwesha kupisa kunodawo kutariswa muzviitiko zvinotenderera;

3. Chisimbiso fomu: Kana shaft chisimbiso ichiiswa radially, kutsauka pakati pemukati dhayamita yeO-ring uye dhayamita inofanira kuiswa chisimbiso inofanira kuva duku sezvinobvira;nokuda kwechisimbiso chegomba, dhayamita yemukati inofanira kuenzana kana kuti zvishoma zvishoma pane dhayamita yegorofu.Paunenge uchiisa axially, iyo yekumanikidza kutungamira inofanirawo kutariswa.Kana kudzvinyirirwa kwemukati kunoshandiswa, dhayamita yekunze yeO-ring inofanira kuva inenge 1% ~ 2% yakakura kudarika dhayamita yekunze ye groove.Kana iyo dhayamita yekunze iri pasi pekumanikidzwa, dhayamita yemukati yeO-ring inofanira kunge idiki pane groove1% ~ 3%.

4. Zvimwe zvinhu zvinokanganisa kushanda kwekuisa chisimbiso

1) Kuoma: Sarudza kuwanda kwekumanikidza kweO-ring uye iyo yakanyanya kubvumirwa extrusion gap ye groove;

2) Extrusion gap: system pressure, O-ring chikamu dhayamita uye kuoma kwezvinhu zvine hukama.

3) Kudzvinyirira zvachose deformation: Munyaya yekumanikidza, kuitira kudzivirira zvachose deformation yepurasitiki.Iyo yakanyanya kudzvanywa inobvumidzwa neO-ring inenge 30% mu static seals uye inosvika makumi maviri muzana muzvisimbiso zvine simba.

4) Pre-compression chiyero: Kuti uve nechokwadi chekusimba mugororo reO-ring, iyo yekutanga yekumanikidza huwandu hunofanirwa kuchengetwa.Iyo pre-compression huwandu hunoenderana nedhayamita yechikamu kazhinji inenge 15% ~ 30% muchisimbiso chakamira.Iyo inenge 9% ~ 25% muchisimbiso chine simba.

5) Kushushikana uye kudzvinyirira: Pachisimbiso chegomba, iyo O-ring iri munzvimbo yakatambanudzwa, uye iyo yakanyanya kubvumidzwa kutambanudza i6%.Kune chisimbiso cheshaft, iyo O-ring inomanikidzwa pamwe neinotenderera nzira, uye iyo yakanyanya kubvumidzwa circumference compression ndeye 3%.

5. I-O-ring inoshandiswa kune yakaderera-speed rotary motion uye rotary shaft chisimbiso nefupi pfupi yekushanda.Kana iyo peripheral speed yakaderera kupfuura 0.5m / s, kusarudzwa kweO-ring kunogona kuenderana nemaitiro ekugadzirisa;Kana iyo yekumhanyisa kumhanya inopfuura 0.5m/s, Zvinofanirwa kufunga nezve chiitiko chekuti elongated rabha mhete inodzika mushure mekupisa, uye mhete yekuisa chisimbiso inofanira kusarudzwa kuitira kuti dhayamita yemukati iite 2% yakakura kupfuura dhayamita ye. shaft yakavharwa.