A tafasar batu na maganin daskarewa. Kwatanta da maganin daskarewa

Kadan na ilimin lissafi

Ba daidai ba ne don magana game da wurin tafasa na maganin daskarewa a cikin ƙayyadaddun maganin daskarewa, saboda, da farko, maganin daskarewa yana da wani nau'in sinadarai, kuma halayen thermophysical an ƙaddara ba kawai ta hanyar zafin jiki ba, har ma da matsa lamba. Abu na biyu, maganin daskarewa, wanda a lokaci guda an ƙirƙira shi na musamman don injunan cikin gida, yana ƙunshe da abubuwan ƙari waɗanda ke tabbatar da ba kawai aikin motar a yanayin zafi ba, amma har ma da kariya daga abubuwa masu haɗari:

• lalata;
• fitarwa;
• cavitation.

Antifreeze, sabanin antifreezes, ba shi da wani sakamako mai mai, kuma ana samun raguwar lalacewa saboda raguwar yanayin zafi na abubuwan motsi na tuƙi, tare da haɓaka wanda aka zaɓi gibi, kuma ƙimar juzu'i ta dabi'a tana ƙaruwa.

Idan komai ya fi ko žasa bayyananne tare da halattaccen zafin jiki (ba fiye da 90 ba^ºC), to, halin da ake ciki tare da matsa lamba a cikin injin ya fi rikitarwa. Don kare injin daga zafi fiye da kima, ana fitar da maganin daskarewa a matsanancin matsin lamba, wanda kuma yana shafar yanayin ruwa. Ga yawancin samfuran, ainihin matsa lamba a cikin toshe Silinda shine aƙalla 1,2 ... 1,3 ATM: to, bisa ga dokar Clausius, matsakaicin zafin jiki da ake buƙata don tafasar kafofin watsa labarai na ruwa yana ƙaruwa. Saboda haka, a ka'idar halatta tafasa batu na coolants iya zama 110 ... 112^ºC.

Menene wurin tafasa na maganin daskarewa?

Yin zafi a cikin injuna na shahararrun kafofin watsa labaru masu sanyaya kamar Felix A40, Motul, Alaska da sauransu yana da alaƙa da ƙarancin adadin maganin daskarewa, rashin aiki na tsarin iskar injin, bayyanar kullewar iska, rashin aiki na tsarin sanyaya, ko yin amfani da ƙananan refrigerant (diluted, ciyar, da dai sauransu). Magana game da tafasar batu na maganin daskarewa zai yiwu ne kawai ga wadanda mota masu ba da damar wani gagarumin wuce haddi na coolant matsa lamba da wuce haddi girma a cikin sanyaya tsarin. Wani abu kuma shine amfani da ruwa mai kama da daskarewa maimakon maganin daskarewa (ana siya a kasuwannin motoci masu ban sha'awa). Waɗannan na iya tafasa da gaske, har ma a yanayin zafi na 90^ºC.

Thermophysical Properties na antifreezes na gida samar

A cikin injunan da aka yi na Rasha, yana da kyau a yi amfani da antifreezes na Phoenix, Sintec da makamantansu. Iyakar ayyukansu kamar haka:

1. Don maganin daskarewa A40M: -40…+108^ºC.
2. Don maganin daskarewa A65M: -65…+108^ºC.
3. Don maganin daskarewa A60M: -60…+105^ºC.
4. Don maganin daskarewa TL-30 Premium: -30…+108^ºC.

A yanayin zafi a cikin injin sama da waɗanda aka nuna, maganin daskarewa yana tafasa.

Matsakaicin haɓaka haɓakar haɓakar maganin daskarewa yana cikin 1,09 ... 1,12. Sauran alamun an ƙaddara ta hanyar buƙatun fasaha na GOST 28084-89.

Ana kuma ƙididdige madaidaicin wurin tafasa na maganin daskarewa ta ƙimar matsa lamba:

• R = 1 a T_bale = 105^ºDAGA;
• R = 1,1 a T_bale = 109^ºDAGA;
• R = 1,3 a T_bale = 112^ºC.

Babban mai samar da antifreezes a cikin kasar shine PKF "MIG da Co" (Dzerzhinsk, yankin Nizhny Novgorod).

Yi rikodin wurin tafasa na maganin daskarewa (antifreeze)