Backup mhete, inozivikanwawo se-anti-extrusion mhete dzeBURs, ita chaizvo zvinorehwa nezita ravo: vanoita sekutsigira kwekusimbisa magungano.
Kune akati wandei akasiyana zvinhu zvinoshandiswa kugadzira zvindori zvekuchengetedza, zvinosanganisira ese mapolymers uye elastomers.Mapolymer anonyanya kuzivikanwa emaringi ekuchengetedza ndeye PEEK, Nylon, uye PTFE.Kusarudza kuti ndezvipi zvekushandisa zvinowanzoenderana nekumanikidza uye tembiricha zvinodiwa.
Mune ino blog positi, isu tichaongorora chinangwa uye mashandisirwo ezvindori zvekuchengetedza, tobva takurukura siyana dzekumanikidza uye tembiricha iyo PEEK, Nylon, uye PTFE zvakakodzerwa nazvo.Chinangwa Chekuchengetedza Rings
Mhete yakanyatsogadzirwa yekuchengetedza yakaiswa pakati pe-o-mhete uye gaka rekubvisa rinogona kudzivirira o-mhete chisimbiso kubva pakubuda mugomba apo ichipa zvese rutsigiro nekudzivirira kune o-ring.Vanoshanda zvakanaka mumamiriro ezvinhu apo kune gomba guru rekuwedzera, kupisa kwepamusoro, kana kudzvinyirira kukuru.Backup mhete dzinonyanya kushandiswa mu:
- mavharuvhu e hydraulic circuits
- pombi dzemakemikari
- jekiseni kuumba michina
- adhesive dispensing valves
- michina
- muchina zvishandiso
- mishonga yemishonga
- michina yekurima
PEEK Backup Rings
PEEK inogona kushandiswa pakumanikidzwa kusvika ku20,000 psi uye uye tembiricha yepamusoro ye500 ° F.Izvi zvinoita kuti PEEK ive yakanaka kune yakanyanya kudzvanywa uye yakanyanya tembiricha yekushandisa.PEEK inowanikwawo yakazadzwa yekuwedzera simba uye kuoma.PEEK inonyatso kuenderana neakasiyana emakemikari, anosanganisira ekuchenesa makomisheni, uye ane yakaderera friction.
Nylon Backup Rings
Nyroni 6,6inoshanda zvakanaka pakumanikidza kuri pasi pe10,000 psi uye tembiricha yepamusoro ye186°F.Nylon inoshanda zvakanaka kune yakanyanya kudzvanywa maapplication asi yakanyanya kugumira maererano nekupisa.Nylon 6,6 yakazadzwa neMolybdenum Disulfide (MoS2) kuderedza kukwesha inowanzoshandiswa kuchengetedza mhete.Imwe yezvipingamupinyi zveNylon 6,6 kunyura kwayo mvura, iyo inogona kubva pa0.5% kusvika 1.4% pamaawa makumi maviri nemana.
PTFE Backup Rings
Yakazadzwa PTFE (girazi rakazadzwa, kabhoni yakazadzwa, graphite yakazadzwa, bhuronzi yakazadzwa)inoshanda nemadzvinyiriro anosvika 5,800 psi, zvisinei mhandara PTFE inogumira kune dzinenge 3,600 psi.Mhandara PTFE, saka, inongogumira kune yakaderera uye yepakati kudzvanywa maapplication uku yakazadzwa PTFE inoshanda kune akawanda epakati kusvika kune yakakwira pressure application.Iyo yakanyanya tembiricha yekushandisa yePTFE yakatenderedza 575 ° F, inoita kuti ive yakakodzera kune yakaderera kudzvanywa, yakanyanya tembiricha yekushandisa.PTFE inoshingirira mumakemikari uye ine yakaderera kukweshera.
Mhedziso
Kana zvasvika kune zvindori zvekuchengetedza, PTFE inoshanda zvakanaka kune yakaderera kusvika pakati pekumanikidza maapplication asi inogona zvakare kubata yakanyanya tembiricha.Nylon inogona kubata zvepakati kusvika kune yakakwira pressure application asi inoganhurwa nekushanda tembiricha uye kunyudzwa kwemvura.Kana zvasvika kune backup mhete zvinhu, PEEK inogona kubata yakanyanya kudzvanywa uye tembiricha yakakwira.Ramba uchifunga kuti PEEK uye PTFE inofananidzwa kana zvasvika pakukweshana kwakaderera uye kuenderana kwemakemikari, ese ari maviri akakosha pakuisa chisimbiso maapplication.
Nguva yekutumira: Kubvumbi-14-2017