ʻO nā kumu like ʻole e pili ana i ke kumu friction bearing
1. Nā waiwai o ka ʻili
Ma muli o ka pollution, ka mālama wela kemika, electroplating a me nā lubricants, a me nā mea ʻē aʻe, ua hoʻokumu ʻia kahi kiʻiʻoniʻoni ʻili lahilahi (e like me ka film oxide, sulfide film, phosphide film, chloride film, indium film, cadmium film, aluminum film, etc.) ka ili metala.), no laila he ʻokoʻa nā waiwai o ka ʻili mai ka substrate.Inā ʻo ka kiʻiʻoniʻoni i loko o kahi mānoanoa, ua kāpīpī ʻia ka wahi pili maoli ma ka mea kumu ma mua o ka kiʻiʻoniʻoni, a hiki ke hoʻohaʻahaʻa ʻia ka ikaika o ka ʻili o ka ʻili ma mua o ka mea kumu;ma ka ʻaoʻao ʻē aʻe, ʻaʻole hiki ke maʻalahi ma muli o ke ola ʻana o ka kiʻiʻoniʻoni.Adhesion, no laila hiki ke hoʻemi ʻia ka ikaika friction a me friction factor e like me ia.ʻO ka mānoanoa kiʻiʻoniʻoni o ka ʻili he mana nui hoʻi i ke kumu friction.Inā ʻeleʻele loa ka kiʻiʻoniʻoni, hiki ke ʻoki ʻia ke kiʻiʻoniʻoni a hiki ke hoʻopili pololei ʻia o ka mea substrate;inā mānoanoa loa ka kiʻiʻoniʻoni, ma kekahi ʻaoʻao, piʻi ka wahi pili maoli ma muli o ke kiʻi palupalu, a ma kekahi ʻaoʻao, ʻoi aku ka nui o nā micro-peaks ma nā ʻaoʻao ʻelua. kaulana.Hiki ke ʻike ʻia he mānoanoa maikaʻi loa ka ʻili o ka ʻili.2. Nā waiwai waiwai He ʻokoʻa ka pānaʻi kuʻi o nā hui kuʻi metala me nā waiwai o nā mea i hoʻopaʻa ʻia.ʻO ka ʻōlelo maʻamau, ʻoi aku ka maikaʻi o ka hoʻopili ʻana i ka metala a i ʻole nā mea hoʻoheheʻe metala me ka ʻoi aku ka nui o ka solubility, a ʻoi aku ka nui o kāna kumu friction;akā, ʻoi aku ka liʻiliʻi o ka friction factor.Loaʻa i nā mea o nā hale like ʻole nā waiwai friction.No ka laʻana, he ʻano paʻa paʻa ka graphite a me ka ikaika hoʻopaʻa liʻiliʻi ma waena o nā papa, no laila ua maʻalahi ke paheʻe, no laila liʻiliʻi ke kumu friction;no ka laʻana, ʻaʻole maʻalahi ka paʻa ʻana o ka paiki daimana ma muli o kona paʻakikī kiʻekiʻe a me ka liʻiliʻi o ka pilina pili maoli, a ʻoi aku ka kiʻekiʻe o kāna kumu friction.liʻiliʻi
3. ʻO ka mana o ka wela o ka mea e hoʻopuni ana i ke kumu friction ma muli o ka hoʻololi ʻana i nā waiwai o ka mea ʻili.ʻO nā hoʻokolohua o Bowden et al.hōʻike i nā kumu friction o nā metala he nui (e like me molybdenum, tungsten, tungsten, a me nā mea ʻē aʻe) a me kā lākou pūhui, ʻO ka liʻiliʻi liʻiliʻi e loaʻa i ka wā e hoʻopuni ana ka mahana waena 700 ~ 800 ℃.Hiki mai kēia ʻano ma muli o ka hoʻemi ʻana o ka piʻi ʻana o ka wela mua i ka ikaika shear, a ʻo ka piʻi ʻana o ka mahana e hāʻule nui ka helu hua, e piʻi nui ai ka wahi pili maoli.Eia nō naʻe, i ka hihia o ka polymer friction pairs a i ʻole ka hana kaomi ʻana, e loaʻa i ka coefficient friction ka waiwai kiʻekiʻe me ka loli o ka mahana.
Hiki ke ʻike ʻia ma luna aʻe nei ka loli ʻana o ka hopena o ka wela ma ke kumu friction, a ua paʻakikī loa ka pilina ma waena o ka mahana a me ke kumu friction ma muli o ka hopena o nā kūlana hana kikoʻī, nā waiwai waiwai, nā loli kiʻi oxide a me nā mea ʻē aʻe. ,
4. Ka māmā holo pili
Ma keʻano laulā, ʻo ka wikiwiki o ka hoʻoheheʻe ʻana e hoʻoulu i ka wela o ka ʻili a me ka piʻi ʻana o ka mahana, pēlā e hoʻololi ai i nā waiwai o ka ʻili, no laila e loli ke kumu friction e like me ia.Ke ʻoi aku ka wikiwiki o ka hoʻoheheʻe ʻana o nā ʻili paʻa o ka paʻa paʻa ma mua o 50m/s, hoʻokumu ʻia ka nui o ka wela ma nā ʻili pili.Ma muli o ka pōkole hoʻomau manawa pili o ka wahi hoʻopili, ʻaʻole hiki i ka nui o ka wela frictional i hana koke ʻia i loko o ka substrate i loko o ka substrate, no laila ua paʻa ka wela frictional i ka papa o ka ʻili, e piʻi aʻe ka mahana o ka ʻili a ʻike ʻia kahi papa hoʻoheheʻe. .ʻO ka metala hoʻoheheʻe ʻia ka hana lubricating a hana i ka friction.E emi ana ke kumu i ka piʻi ʻana o ka māmā.No ka laʻana, inā he 135m/s ka māmā holo o ke keleawe, ʻo 0.055 kona kumu hoʻoheheʻe;ke 350m/s, ua hoemi ia i 0.035.Eia nō naʻe, ʻaʻole i hoʻopilikia ʻia ke kumu friction o kekahi mau mea (e like me ka graphite) e ka wikiwiki o ka hoʻoheheʻe ʻana, no ka mea hiki ke mālama ʻia nā ʻano mechanical o ia mau mea ma kahi ākea ākea.No ka friction palena, i ka haʻahaʻa māmā laula kahi i emi iho ai ka māmā ma mua o 0.0035m/s, ʻo ia hoʻi, ka hoʻololi ʻana mai ka friction static a hiki i ka friction dynamic, i ka piʻi ʻana o ka wikiwiki, e emi mālie ka friction coefficient o ke kiʻi adsorption a makemake i kahi. ka waiwai mau, a me ke kumu hoʻoheheʻe o ke kiʻi hoʻihoʻi.
5. Haawe
Ma keʻano laulā, e emi iho ana ka pānaʻi kuʻi o ka hui kuʻekuʻe metala me ka hoʻonui ʻana o ka haʻawe, a laila ʻano paʻa.Hiki ke wehewehe ʻia kēia ʻano e ka adhesion theory.Ke liʻiliʻi loa ka haʻawe, ʻo nā ʻaoʻao ʻelua ʻelua i loko o ka hoʻopili elastic, a ʻo ka ʻāpana pili maoli e like me ka mana 2/3 o ka ukana.E like me ke kumumanaʻo adhesion, pili ka ikaika friction i ka wahi pili maoli, no laila ʻo ka friction factor ka 1 o ka ukana./3 ka mana like ole;i ka nui o ka haawe, aia na papalua elua i loko o ke ano elastic-plastic contact state, a ua like ka wahi pili maoli i ka mana 2/3 a i ka 1 o ka ukana, no laila e emi malie ke kumu friction me ka hoonui o ka ukana. .ʻano kūpaʻa;i ka nui loa o ka haawe a komo na ili elua i ka palaka, ua kuokoa ke kumu friction i ka ukana.ʻO ka nui o ke kumu friction static e pili pū ana me ka lōʻihi o ka pilina paʻa ma waena o nā ʻaoʻao ʻelua ma lalo o ka ukana.Ma keʻano laulā, ʻoi aku ka lōʻihi o ka hoʻopili paʻa ʻana, ʻoi aku ka nui o ke kumu friction static.ʻO kēia ma muli o ka hana o ka ukana, kahi e hoʻololi ai i ka plastic deformation ma ka wahi pili.Me ka hoʻonui ʻana i ka manawa pili static, e hoʻonui ʻia ka wahi pili maoli, a hoʻokomo ʻia nā micro-peaks i kekahi i kekahi.ma muli o ka hohonu.
6. 'Oka 'ilikai
I ka hihia o ka pa'i 'ilika, no ka mea, he li'ili'i ka mana o ka 'ilikai ma ka wahi pili maoli, hiki ke no'ono'o 'ia 'a'ole hiki ke ho'opili 'ia ke kumu friction e ka 'ilikai.No ka lua friction maloʻo me ka elastic a i ʻole elastoplastic pili, ke liʻiliʻi ka waiwai o ka ʻili, liʻiliʻi ka hopena mechanical, a nui ka ikaika mole;a me ka hope.Hiki ke ʻike ʻia he liʻiliʻi ka waiwai o ka friction factor me ka hoʻololi ʻana o ka ʻili o ka ʻili
ʻAʻole kaʻawale nā hopena o nā mea i luna ma luna o ka friction factor , akā pili pū kekahi.
Ka manawa hoʻouna: ʻAukake-24-2022