Nzira yekutarisa sei density ye antifreeze?
Zviri mukati
Kuwanda kweantifreeze zvichienderana nehuwandu hwe ethylene glycol
Antifreeze, muchidimbu, mushonga wemumba. Kureva kuti, mvura ine yakaderera kutonhora nzvimbo yeinjini yekutonhodza system.
Antifreeze ine zvikamu zviviri zvikuru: mvura uye ethylene glycol. Inodarika 90% yehuwandu hwehuwandu inoumbwa nezvinwiwa izvi. Iyo yakasara ndeye antioxidant, antifoam, inodzivirira uye zvimwe zvinowedzera. Dhayi inowedzerwawo kune antifreeze. Chinangwa chayo ndechekuratidza kutonhora kwemvura uye kuratidza kupera.
Kuwanda kwe ethylene glycol i 1,113 g/cm³. Kuwanda kwemvura i1,000 g/cm³. Kusanganisa zvinwiwa izvi zvinopa chimiro chine density ichave pakati pezviratidzi zviviri izvi. Nekudaro, kutsamira uku hakusi-mutsara. Ndiko kuti, kana ukasanganisa ethylene glycol nemvura muchiyero che50/50, ipapo kuwanda kwemusanganiswa unoguma hauzoenzane neavhareji kukosha pakati pehuviri huviri hwezvinwiwa izvi. Izvi zvinokonzerwa nekuti ukuru uye chimiro chepakati chemamorekuru emvura uye ethylene glycol zvakasiyana. Mamorekuru emvura akati diki uye anotora nzvimbo pakati peethylene glycol molecules.
Kune antifreeze A-40, avhareji density pakamuri tembiricha inenge 1,072 g/cm³. MuA-65 antifreeze, nhamba iyi yakakwirira zvishoma, inenge 1,090 g / cm³. Kune matafura anonyora density values for antifreeze yeakasiyana concentrations zvichienderana nekupisa.
Mune chimiro chayo chakachena, ethylene glycol inotanga kupenya kusvika -12 °C. Kubva pa100% kusvika pa67% ethylene glycol mumusanganiswa, poindi yekudira inofamba ichienda kudiki uye inosvika panhongonya pa -75 °C. Uyezve, nekuwedzera kwechikamu chemvura, nzvimbo yechando inotanga kukwira kune tsika dzakanaka. Saizvozvowo, density zvakare inoderera.
Kutsamira kwe density ye antifreeze pane tembiricha
Mutemo wakareruka unoshanda pano: nekuderera kwekushisa, kuwanda kweantifreeze kunowedzera. Ngatitarisei muchidimbu muenzaniso we antifreeze A-60.
Pane tembiricha iri pedyo nechando (-60 ° C), density inoshanduka ichitenderedza 1,140 g/cm³. Kana yapisa kusvika +120 ° C, density yeantifreeze inoswedera kune chiratidzo che 1,010 g/cm³. Izvozvo zvinenge zvakangofanana nemvura yakachena.
Iyo inonzi nhamba yePrandtl zvakare inoenderana nekuwanda kweantifreeze. Inotara kugona kweinotonhodza kubvisa kupisa kubva painodziya. Uye iyo yakakura density, iyo inonyanya kutaurwa kugona uku.
Nzira yekutarisa sei density ye antifreeze?
Kuongorora kuwanda kweantifreeze, pamwe nekutarisa kuwanda kwechero imwe mvura, hydrometer inoshandiswa. Zvinokurudzirwa kushandisa hydrometer yakanyatsogadzirirwa kuyera density yeantifreeze uye antifreeze. Maitiro ekuyera ari nyore.
- Tora chikamu chemuvhenganiswa webvunzo mumudziyo wakatetepa wakadzika, wakakwana kunyudzwa kwemahara kwehydrometer (mizhinji michina ine yakajairwa yekuyeresa flask). Ziva tembiricha yemvura. Zvakanakisa kuyera pakamuri tembiricha. Kuti uite izvi, iwe unofanirwa kutanga wasiya antifreeze kumira mukamuri kweanenge maawa maviri kuitira kuti isvike mukamuri tembiricha.
- Dzikisa hydrometer mumudziyo une antifreeze. Pima kuwanda pachikero.
- Tsvaga yako tsika mutafura nekutsamira kwehuremu hweantifreeze pane tembiricha. Pane imwe density uye ambient tembiricha, panogona kuve nereshiyo mbiri dzemvura uye ethylene glycol.
Mune 99% yezviitiko, chiyero chakarurama chichava icho kune mvura yakawanda. Sezvo zvisiri zvehupfumi zvinogoneka kugadzira antifreeze yakavakirwa zvakanyanya pa ethylene glycol.
Iyo tekinoroji yekuyera density yeantifreeze maererano neiyo nzira pachayo haina kusiyana. Nekudaro, zvinodikanwa kushandisa iyo yakawanikwa data maererano nekufungidzira kusungirirwa kwechinhu chinoshanda chemhando dzakasiyana dzeantifreezes nenzira dzakasiyana. Izvi zvinokonzerwa nekuumbwa kwakasiyana kwemakemikari kweizvi zvinotonhorera.
