Nohoanga takirere pūrerehuaHe wāhanga tango kei roto i te takirere, ko te mahi matua he tautoko i te pereti takirere kia tuwhera katoa, kia kati katoa rānei, hei hanga i te kopa hiri. I te nuinga o te wā, ko te diameter o te nohoanga he rite ki te rahi o te takirere. He whānui rawa ngā rauemi nohoanga takirere pūrerehua, ko ngā rauemi e whakamahia whānuitia ana ko te EPDM hiri ngohengohe, NBR, PTFE, me te rauemi hiri kāpia mārō whakarewa. Ka whakaatuhia e mātou tētahi i muri i tētahi.
1.EPDM-Ki te whakaritea ki ētahi atu rapa whānui, he nui ngā painga o te rapa EPDM, e whakaatuhia ana i roto i:
A. He tino whai hua te utu, i roto i ngā panana e whakamahia whānuitia ana, ko te hiri rapa mata o te EPDM te mea māmā rawa, ka taea e koe te mahi i te maha o ngā whakakī, ka whakaiti i te utu o te rapa.
B. He ātete te rauemi EPDM ki te koroheketanga, te tu atu ki te pānga o te rā, te ātete wera, te ātete kohu wai, te ātete i te hihi, he pai mō ngā waikawa ngoikore me ngā pāpāho kawakore, he pai ngā āhuatanga whakamahana.
C. Te whānuitanga pāmahana, ko te iti rawa ko te -40 ° C - 60 ° C, ā, ko te pāmahana ka taea te 130 ° C mō te whakamahinga roa.
2.NBR-ātete ki te hinu, ātete ki te wera, ātete ki te kakahu, ā, i te wa ano he ātete pai ki te wai, ki te hau, me ngā āhuatanga piri pai. He maha ake ngā whakamahinga i roto i te paipa hinu, ko te ngoikoretanga he kore e ātete ki te pāmahana iti, te ātete ki te ozone, ngā āhuatanga whakamarumaru ngoikore, ā, he whānui hoki te ngāwari.
3. PTFE: he kirihou fluorine, he kaha te ātete o tēnei rauemi ki te waikawa me te kawakore, he maha ngā mahi whakarewa waro, engari he ātete pāmahana teitei te rauemi, ka taea te whakamahi tonu i te 260 ℃, ka taea te eke ki te pāmahana teitei ki te 290-320 ℃. I puta mai te PTFE, ā, kua angitu te whakaoti rapanga i roto i te umanga matū, hinu, rongoā me ētahi atu umanga.
4. Hiri mārō whakarewa (carbide): He tino pai te ātete o te rauemi nohoanga takirere mārō whakarewa ki te pāmahana teitei me te pēhanga teitei, te ātete ki te waikura, me ngā āhuatanga ātete kakahu. He tino pai te whakakapi i ngā hapa o te rauemi hiri ngohengohe. Kāore e ātete ki te pāmahana teitei me te pēhanga teitei, engari he tino teitei te rauemi hiri mārō ki ngā whakaritenga tukatuka o te tukanga. Ko te ngoikoretanga anake o te mahi hiri o te nohoanga takirere mārō whakarewa he ngoikore, ka roa te wā e mahi ana te mahi o te turuturu.