Nā Pono Kino & Mechanical o PTFE i piha

PTFELoaʻa i loko o nā ʻano ʻokoʻa like ʻole e like me Virgin PTFE, Chemically Modified PTFE, Carbon Filled PTFE, Glass Filed PTFE, Carbon / Coke Filled PTFE, Graphite Filled PTFE, Bronze Filled PTFE, Bronze + Molybdenum Disulphide Filled PTFE, Aluminum Oxide Filled PTFE, Calcium Fluoride Hoʻopiha PTFE, Stainless Steel Filled PTFE, Mica Filled PTFE, Glass + MoS2 Filled PTFE, MoS2 Filled PTFE, Chemically Modified PTFE etc.

ʻO ka hoʻopili ʻana ma waena o ʻelua mau papa hoʻoheheʻe, ma muli o ka friction hiki ʻole ke hana ʻia i loko o ka wahi hoʻopili, hopena i kahi lole e pili ana ka nui i ka ukana, ka wikiwiki a me ka manawa o ka hoʻopili ʻana.ʻO ka manaʻo, ma waena o kēia mau ʻāpana a me ka ʻaʻahu i loaʻa kahi pilina pili i:

R = KPVT

kahi, i hōʻike ʻia ma nā ʻāpana ana o ka pākaukau: R = ʻaʻahu i ka mmP = ka ukana kikoʻī ma N/mm2 (e pili ana i ka ʻili – Ø xl – i ka hihia o nā kumu lāʻau, nā nipples, etc.)V = ka holo wikiwiki ʻana i m/secT = manawa i hrsK = kumu hoʻohana i mm3 sec/Nmh.

ʻO ka waiwai o ka helu PV ma hope o ka lilo ʻana o ka coefficient o ka ʻaʻahu i kona ʻano linear, me ka manaʻo ʻana i nā waiwai kupaianaha me ka neʻe ʻana o ka ʻōnaehana mai ka nāwaliwali a i ke kūlana ʻaʻahu ikaika, ua ʻike ʻia ʻo "palena PV".ʻO kēia palena PV a me ka mea hoʻohana, no laila, nā ʻāpana hiʻohiʻona o kēlā me kēia mea.I ka hoʻomaʻamaʻa, akā naʻe, hiki ke ʻike maʻalahi, hiki ke ʻokoʻa ke ʻano o ka ʻaʻahu a me ka palena PV o ka mea i hoʻopiha ʻia me ke ʻano, ka paʻakikī a me ka hoʻopau ʻana o ka ʻili o ka pilina "hoa" me ke alo, a i ʻole. o ka wai hooluolu a/ai ole.

Deformation ma lalo o ka ukana a me ka compressive ikaika PTFE, e like me ka nui 'ē aʻe palaki mea, 'aʻohe "elastic zone" kahi o ka lākiō ukana / deformation (Young modulus) he mau waiwai.ʻO kēia ratio haʻahaʻa / deformation e pili ana i ka manawa o ka noi o ka ukana a me nā deformations e hiki mai ana;ʻike ʻia kēia ʻano he "creep", a ma ka wehe ʻana o ka ukana, aia wale nō ka hoʻihoʻi ʻana o ka deformation i ke kūlana mua ("elastic recovery"), i mau ai mākou i mua o kahi "deformation mau loa. ”.

ʻO Creep, ʻaʻole ia he laina laina o ka manawa, nā hopena ma hope o 24 mau hola i nā deformations i ka hapa nui o nā hihia ʻaʻole i noʻonoʻo ʻia.Me ka piʻi ʻana o ka mahana, aia ka hāʻule ʻana o ka deformation ma lalo o nā waiwai ukana a ma muli o ka ikaika compressive i 100 ° C like me 1/2 o kēlā ma 23 ° C a ma 200 ° C ma kahi o 1/10th.

I kēlā me kēia hihia, PTFE a ma ke ʻanopiha PTFE, ʻo ia kekahi o nā mea plastik e mālama ana, ma nā wela kiʻekiʻe, nā waiwai deformation maikaʻi loa ma lalo o ka ukana.No ka hoʻopau ʻana, ʻo ka hoʻihoʻi elastic ma kahi o 50% o nā deformations ma lalo o ka ukana, a me nā deformations mau e like me 50% o nā deformations ma lalo o ka ukana.

Pili kēia i ka PTFE i hoʻopiha ʻia a i hoʻopiha ʻole ʻia.ʻOi aku ka maikaʻi o nā waiwai o ka mua.ʻO kaʻoiaʻiʻo,ʻo ka deformation ma lalo o ka ukana o nāʻano maʻamau o ka PTFE i hoʻopihaʻia e pili ana i ka 1/4 o nā mea i hoʻopihaʻoleʻia,ʻoiai ka ikaika compressive e pili ana i ka pālua.

ʻAno wela o ka PTFE i hoʻopiha ʻia

ʻOi aku ka haʻahaʻa o ka hoʻonui wela o ka PTFE i hoʻopiha ʻia ma mua o ka PTFE i hoʻopiha ʻole ʻia a ʻoi aku ka maikaʻi ma ke ʻano o ka hoʻoheheʻe ʻana ma mua o ka crosswise.ʻOi aku ka maikaʻi o ka thermal conductivity ma mua o ka PTFE i hoʻopiha ʻole ʻia, ʻoiai ke hoʻohana ʻana i nā mea hoʻopihapiha i loaʻa iā lākou ka conductivity thermal kiʻekiʻe.

ʻOi aku ka maikaʻi o ka PTFE piha ma mua o nā mea i hoʻopiha ʻole ʻia.

Nā Pono Uila o PTFE i piha

Pili kēia mau waiwai i ke ʻano o ka mea hoʻopihapiha.ʻO ka PTFE wale nō i hoʻopiha ʻia me ke aniani aniani ka loaʻa ʻana o nā waiwai dielectric maikaʻi, ʻoiai ʻokoʻa ka PTFE i hoʻopiha ʻole ʻia.No ka laʻana, ʻokoʻa ka nui a me ka resistivity o ka ʻili, ka dielectric mau a me ka mea dissipation me ka hoʻololi ʻana o ka haʻahaʻa a me ka pinepine.