Answer
Hysteresis a cikin maɓuɓɓugan raƙuman ruwa shine bambanci a cikin kaya a tsayin da aka ba da tsakanin bugun jini da bugun jini na dawowa. Yana faruwa ne da farko saboda gogayya tsakanin bazara da saman matukin jirgi (bore ko shaft) da gogayya ta kwayoyin halitta. A cikin bazara mai-juyawa Crest-zuwa-Crest, gogayya kuma yana faruwa a wuraren tuntuɓar raƙuman ruwa. Don rage girman hysteresis don madaidaicin na'urori masu auna firikwensin ko bawul masu sarrafawa, muna amfani da lubricants mai bushe-fim (kamar $ MoS_2 $), tabbatar da ingantaccen saman saman da aka gama akan abubuwan mating ($ Ra <32 \ mu in $), da haɓaka adadin raƙuman ruwa $ N $ don rage ƙarfin haɓaka radial. Ƙaƙƙarfan shigarwa yana tabbatar da cewa bazara yana amsawa nan take ga ƙananan canje-canje a ƙaura.
