Ramin ma'auni (tashar dawowa) shine yafi dacewa don daidaita ƙarfin axial da aka haifar lokacin da mai kunnawa ke aiki, da kuma rage lalacewa na ƙarshen ƙarewa da lalacewa na farantin turawa. Lokacin da impeller ya juya, ruwan da aka cika a cikin injin zai gudana daga mai motsa jiki zuwa Cibiyar an jefa shi zuwa gefen abin da ke ciki tare da tashar gudana tsakanin ruwan wukake. Yayin da ruwan ya shafa da ruwan wukake, matsa lamba da sauri suna ƙaruwa a lokaci guda, suna haifar da ƙarfin axial na gaba. Ramin a cikin impeller oftsaga harka famfo shi ne don rage axial karfi da impeller samu. Karfi Yana taka rawa wajen kare bearings, tura fayafai da sarrafa matsi na famfo.

Matsayin rage ƙarfin axial ya dogara da adadin ramukan famfo da girman diamita na rami. Ya kamata a lura cewa zoben rufewa da ramin ma'auni sun dace. Rashin amfani da wannan hanyar ma'auni shine cewa za'a sami asarar inganci (yayiwar ramin ma'auni shine gaba ɗaya 2% zuwa 5% na ƙirar ƙira).

Bugu da ƙari, zubar da ruwa ta hanyar ramin ma'auni ya haɗu tare da babban ruwa mai gudana yana shiga cikin impeller, wanda ke lalata yanayin gudana na al'ada kuma yana rage aikin anti-cavitation.

A kwararar da ba a ƙididdigewa ba, yanayin kwarara yana canzawa. Lokacin da yawan kwarara ya yi ƙanƙanta, saboda tasirin jujjuyawar da aka rigaya, matsa lamba a tsakiyar mashigin impeller ya fi ƙasa da matsa lamba a gefen waje, kuma zub da jini ta hanyar ramin ma'auni yana ƙaruwa. Ko da yake Rabu harka famfo kai yana ƙaruwa, matsa lamba a cikin ƙananan ɗakin na zoben rufewa har yanzu yana da ƙasa sosai, don haka ƙarfin axial yana ƙara ragewa. Karami. Lokacin da yawan kwarara ya yi girma, ƙarfin axial ya zama ƙarami saboda digon kai.

Wasu sakamakon bincike sun nuna cewa: jimlar yanki na ramin ma'auni shine sau 5-8 da rata na zoben bakin, kuma za'a iya samun mafi kyawun aiki.