I ngā tau tōmua o te rautau 1900 – i te wā i whakamātau tuatahi ai ngā kaipuke o te ope taua i ngā miihini tīhiera – i puta ake tētahi atu auahatanga nui i tērā pito o te raina pou poroporo.
I te haurua tuatahi o te rautau rua tekau,hiri mīhini papui noho hei hononga paerewa i waenga i te whakaritenga toki i roto i te anga o te kaipuke me ngā wāhanga e tū ana ki te moana. I tukuna e te hangarau hou he whakapainga nui i roto i te pono me te huringa ora ki te whakataurite ki ngā pouaka whakakī me ngā hiri repe i kaha ake i te mākete.
Kei te haere tonu te whanaketanga o te hangarau hiri miihini o te pou i ēnei rā, me te arotahi ki te whakarei ake i te pono, te whakanui ake i te roa o te oranga o te hua, te whakaiti i te utu, te whakangawari i te tāutanga me te whakaiti i te tiaki. Ka whakamahia e ngā hiri hou ngā rauemi hou, ngā tukanga hoahoa me te hanga, me te whakamahi i te hononga me te waatea o ngā raraunga hei whakahohe i te aroturukitanga mamati.
I muaNgā Hiri Mīhini
Ngā hiri miihini o te pouHe hikoinga whakamua whakamiharo tēnei mai i te hangarau matua i whakamahia i mua hei ārai i te wai moana kia kaua e uru ki roto i te anga huri noa i te pou poroporo. Kei roto i te pouaka whakakī, i te repe rānei kua tākaihia he rauemi whiri, he rite ki te taura, e whakakahangia ana ki te pou hei hanga hiri. Mā tēnei ka hanga he hiri kaha, ā, ka taea e te pou te huri. Heoi, he maha ngā ngoikoretanga i arohia e te hiri miihini.
Ko te waku e puta mai ana i te poro e hurihuri ana ki te takai ka arahi ki te pakaru i roto i te wā, ka piki ake te turuturu tae noa ki te whakatikatika, te whakakapi rānei i te takai. He nui ake te utu i te whakatika i te pouaka whakakī ko te whakatika i te poro porowhita, ka taea hoki te pakaru e te waku. I roto i te wā, tera pea ka pakaru te awaawa ki roto i te poro, ka mutu ka kore e tika te whakaritenga o te whakatere, ka mutu ka hiahiatia he taunga maroke, he tango i te poro me te whakakapi i te ringaringa, tae noa ki te whakahou i te poro. Hei whakamutunga, ka ngaro te pai o te whakatere nā te mea me whakaputa e te miihini he kaha ake hei huri i te poro ki te whakakī repe piri, ka moumou te kaha me te wahie. Ehara i te mea iti noa iho tēnei: kia tutuki ai ngā reiti turuturu e whakaaetia ana, me tino piri te whakakī.
He mea māmā noa iho te repe kua tākaihia, he mea haumaru hoki, ā, he maha tonu ngā wā ka kitea i roto i ngā rūma miihini maha hei tautoko. Mēnā ka pakaru te hiri miihini, ka taea e te kaipuke te whakaoti i tana mahi me te hoki ki te tauranga mō ngā whakatikatika. Engari i hangaia tēnei e te hiri pito-mata miihini mā te whakanui ake i te pono me te whakaiti i te turuturu.
Ngā Hiri Mīhini o Mua
I puta te hurihanga o te hiri huri noa i ngā wāhanga hurihuri me te mōhiotanga kāore e hiahiatia te miihini i te hiri i te taha o te rakau – pērā i te mahi tākai – e ai ki te tikanga. E rua ngā mata – tētahi e hurihuri ana me te rakau, ko tētahi e mau ana – e whakanohoia ana ki te poutū ki te rakau, ā, e pēhia ana e ngā kaha waipēhi me te miihini, ka taea te hanga i tētahi hiri piri ake, he kitenga e kīia ana nā te miihini a George Cooke i te tau 1903. Ko ngā hiri miihini tuatahi i whakamahia mō te hokohoko i whakawhanakehia i te tau 1928, ā, i whakamahia ki ngā papu me ngā compressor centrifugal.
Wā tuku: Oketopa-27-2022