Ko te G he waeine e whakamahia whānuitia ana hei whakaahua i te kaha o te wiri i roto ingā motuka wirime ngā kaiwhakaoho ahorangi rārangi. E tohu ana i te whakaterenga nā te kaha ā-papatipu, arā, tata ki te 9.8 mita ia hekona tapawhā (m/s²).
Ina kīia he taumata wiri o te 1G, ko te tikanga he ōrite te kaha o te wiri ki te whakaterenga e pā ana ki tētahi mea nā te kaha ā-papa. Mā tēnei whakatairite ka taea e tātou te mārama ki te kaha o te wiri me tōna pānga pea ki te pūnaha, ki te tono rānei o nāianei.
He mea nui kia mōhiotia ko te G he huarahi noa iho hei whakaatu i te kaha o te wiri, ka taea hoki te ine i roto i ētahi atu waeine pēnei i te mita ia hekona tapawhā (m/s²) te mirimita ia hekona tapawhā (mm/s²) rānei, i runga i ngā whakaritenga motuhake, i te paerewa rānei. Ahakoa rā, mā te whakamahi i te G hei waeine ka mārama te tohutoro, ā, ka āwhina i ngā kiritaki ki te mārama ki ngā taumata wiri i roto i te huarahi e tika ana.
He aha te take kāore e whakamahia ai te nekehanga (mm) te kaha rānei (N) hei ine i te kaha wiri?
Ngā motuka wiriKāore i te whakamahia takitahi. He maha ngā wā ka whakauruhia ki roto i ngā pūnaha nui ake me ngā papatipu ūnga. Hei ine i te kaha wiri, ka whakairihia e mātou te motuka ki runga i te papatipu ūnga e mōhiotia ana, ā, ka whakamahia he ine whakatere hei kohi raraunga. Mā tēnei ka mārama ake te āhua o ngā āhuatanga wiri whānui o te pūnaha, ka whakaaturia e mātou i roto i tētahi hoahoa āhuatanga mahi noa.
Ka whakatauhia te kaha e pā ana ki te motuka wiri e te whārite e whai ake nei:
$$F = m \times r \times \omega ^{2}$$
Ko (F) te tohu o te kaha, ko (m) te tohu o te papatipu rerekē i runga i te motuka (ahakoa te pūnaha katoa), ko (r) te tohu o te rerekētanga o te papatipu rerekē, ā, ko (Ω) te tohu o te auau.
Me mōhio ko te kaha wiri anake o te motuka e kore e aro ki te awe o te papatipu ūnga. Hei tauira, me nui ake te kaha e hiahiatia ana e te mea taumaha hei whakaputa i te taumata whakaterenga rite tonu ki te mea iti ake, māmā ake hoki. Nō reira, ki te whakamahia e ngā mea e rua te motuka kotahi, ka wiri te mea taumaha ki te kaha iti ake, ahakoa ka whakaputahia e ngā motuka te kaha ōrite.
Ko tētahi atu āhuatanga o te motuka ko te auau wiri:
$$ f = \frac{Mōta \: Tere \:(RPM)}{60}$$
Ko te nekehanga i puta mai i te wiri ka pāngia tika e te auau o te wiri. I roto i tētahi taputapu wiri, ka mahi ā-hurihuri ngā kaha ki runga i te pūnaha. Mō ia kaha e tukuna ana, he kaha ōrite, he kaha rerekē hoki e whakakore ana i a ia. Ina teitei ake te auau o te wiri, ka heke te wā i waenganui i te putanga mai o ngā kaha rerekē.
Nō reira, he iti ake te wā e nekehia ai te pūnaha i mua i te whakakorenga a ngā kaha taupatupatu. Hei tāpiri, ka iti ake te nekehanga o te mea taumaha i te mea mama ake ina pāngia e te kaha ōrite. He rite tēnei ki te pānga i whakahuatia i mua ake nei mō te kaha. Me nui ake te kaha e hiahiatia ana mō te mea taumaha ake kia eke ki te nekehanga ōrite ki te mea mama ake.
Whakapā mai
Ka taea e tā mātou tīma te tautoko me te āwhinamotuka wiri hikohua. E mārama ana mātou he uaua te mārama, te tautuhi, te whakamana me te whakauru i ngā hua motuka ki ngā tono mutunga. Kei a mātou te mātauranga me te tohungatanga hei āwhina i te whakaiti i ngā mōrearea e pā ana ki te hoahoa, te hanga me te tuku motuka. Whakapā mai ki tā mātou tīma i tēnei rā ki te matapaki i ō hiahia e pā ana ki te motuka me te kimi i tētahi otinga e tika ana mō ō hiahia. Kei konei mātou hei āwhina.
Kōrero ki ō Tohunga Kaiārahi
Ka āwhina mātou i a koe ki te karo i ngā mahanga hei whakatutuki i te kounga me te uara o tō motuka paraihe iti e hiahiatia ana, i te wā tika me te tahua.
Wā tuku: Whiringa-ā-rangi 17-2023
