ʻO ka viscosity o ka aila mīkini - hoʻoholo mākou me ka pilikia ʻole
Nā mea
ʻAʻole paʻakikī ke koho ʻana i kahi lubricant no ka ʻenekini o kāu kaʻa inā ʻike ʻoe i ke ʻano o ka viscosity o ka ʻaila ʻenekini a me kekahi o kāna mau ʻāpana ʻē aʻe. Hiki i nā mea hoʻokele ke hoʻomaopopo i kēia pilikia.
ʻO ka ʻaila viscosity - he aha ia?
Hana kēia wai i nā hana koʻikoʻi e hōʻoia i ka hana ʻana o ka mīkini: ka wehe ʻana i nā huahana lole, e hōʻoia i kahi hōʻailona maikaʻi loa o ka cylinder tightness, lubrication o nā mea pili. Ke noʻonoʻo nei he ākea ākea ka pae wela o ka hana o nā mana o nā kaʻa hou, paʻakikī i nā mea hana ke hana i kahi ʻano "kūpono" no ka kaʻa.
Akā hiki iā lākou ke hana i nā aila e kōkua ai i ka hoʻokō pono ʻana i ka ʻenekini maikaʻi loa, ʻoiai e hōʻoiaʻiʻo ana i kāna ʻaʻahu hana ʻole. ʻO ka hōʻailona koʻikoʻi o kēlā me kēia ʻaila ʻenekini kona papa viscosity, ka mea e hoʻoholo ai i ka hiki o ka haku mele ke mālama i kona wai, e waiho ana ma ka ʻili o nā ʻāpana mana. ʻO ia hoʻi, ua lawa ka ʻike i ka viscosity e ninini ai i ka ʻaila ʻenekini i loko o ka ʻenekini hoʻopau i loko, a ʻaʻole hopohopo hou i kāna hana maʻamau.
Dynamic a me kinematic viscosity o ka aila mīkini
Ua hoʻokumu ka American Union of Automotive Engineers SAE i kahi ʻōnaehana māmā e hoʻokumu i nā māka viscosity no nā aila kaʻa. Lawe ia i ʻelua ʻano viscosity - kinematic a me ka ikaika. Ua ana ʻia ka mua ma nā viscometers capillary a i ʻole (kahi i ʻike pinepine ʻia) i nā centistokes.
Hōʻike ka viscosity kinematic i kona wai i nā mahana kiʻekiʻe a maʻamau (100 a me 40 degere Celsius, kēlā me kēia). Akā ʻo ka viscosity dynamic, ka mea i kapa ʻia ʻo absolute, e hōʻike ana i ka ikaika kūʻē i hana ʻia i ka wā o ka neʻe ʻana o ʻelua mau papa wai i hoʻokaʻawale ʻia e 1 kenimika mai kēlā me kēia me ka wikiwiki o 1 cm / s. Hoʻonohonoho ʻia ka ʻāpana o kēlā me kēia papa me 1 knm, ua ana ʻia me nā viscometers rotational.
Pehea e hoʻoholo ai i ka viscosity o ka ʻaila ʻenekini e like me ke kūlana SAE?
ʻAʻole hoʻonohonoho kēia ʻōnaehana i nā ʻāpana maikaʻi o ka lubrication. ʻO ia hoʻi, ʻaʻole hiki i ka viscosity index o ka ʻaila ʻenekini ke hāʻawi i ka mea hoʻokele kaʻa i ka ʻike maopopo e pili ana i ka wai kikoʻī i kūpono iā ia e hoʻopiha ai i ka ʻenekini o kāna "lio hao". Akā, ʻo ka alphanumeric a i ʻole ka hōʻailona kikohoʻe o ka haku mele SAE e wehewehe ana i ka mahana o ka ea i ka wā e hiki ai ke hoʻohana ʻia ka ʻaila, a me ke kau o kona hoʻohana ʻana.
ʻAʻole paʻakikī ka wehewehe ʻana i ka viscosity o ka ʻaila ʻenekini e like me ka SAE. Hōʻailona ʻia nā lubricants āpau āpau e like me kēia - SAE 0W-20, kahi:
- ʻO ka helu 20 kahi hōʻailona o ka viscosity wela kiʻekiʻe o ka haku mele;
- ʻO ka leka Pelekane W "hāʻawi i ka ʻae" no ka hoʻohana ʻana i ka ʻaila i ka hoʻoilo;
- ʻO ka helu 0 e hoʻoholo i ka haʻahaʻa haʻahaʻa haʻahaʻa haʻahaʻa i ʻae ʻia e hoʻomaka i ka mīkini a hiki i -40 ° C.
ʻOi aku ka maʻalahi o ka hoʻokaʻawale ʻana o nā aila kaʻa e ka viscosity no nā hoʻolālā kau. ʻO nā mea kauwela e like me SAE 50, nā hoʻoilo - SAE 20W.
Ma ka hoʻomaʻamaʻa, koho ʻia ka papa SAE ma muli o ke ʻano o ka awelika o ka hoʻoilo hoʻoilo maʻamau no ka wahi i hoʻohana ʻia ai ke kaʻa. ʻO nā mea hoʻokele Lūkini maʻamau e koho i nā huahana me kahi index o 10W-40, no ka mea, ʻoi aku ka maikaʻi o ka hana ma nā mahana a hiki i -25 degere. A ʻo ka ʻike kikoʻī loa e pili ana i ka hoʻokō ʻana o nā hui viscosity home a me nā papa honua aia i loko o ka papa ʻaila viscosity. ʻAʻole paʻakikī loa ka ʻimi ʻana iā ia ma ka Pūnaewele.
Ma kahi o ka wehewehe ʻana o nā aila e ka viscosity, ua māhele ʻia lākou e like me ACEA a me nā helu API. Hoʻohālikelike lākou i nā lubricants kaʻa ma ke ʻano o ka maikaʻi, akā e kamaʻilio mākou e pili ana i kēia ma kekahi mea e pili ana i ka viscosity o nā lubricants no nā ʻenekini kaʻa.
