Monga njira yotumizira, zida zapadziko lapansi zimagwiritsidwa ntchito kwambiri m'machitidwe osiyanasiyana aukadaulo, monga chochepetsera magiya, crane, chochepetsera magiya apadziko lapansi, ndi zina zotero. Pa chochepetsera magiya apadziko lapansi, nthawi zambiri chimatha kusintha njira yotumizira ya sitima ya giya yokhazikika nthawi zambiri. Chifukwa njira yotumizira magiya imakhudzana ndi mzere, kuyika ma mesh kwa nthawi yayitali kumayambitsa kulephera kwa magiya, kotero ndikofunikira kutsanzira mphamvu yake. Li Hongli ndi anzake adagwiritsa ntchito njira yolumikizira ma mesh yokha kuti agwirizane ndi magiya apadziko lapansi, ndipo adapeza kuti torque ndi kupsinjika kwakukulu ndizolunjika. Wang Yanjun ndi anzake adagwirizanitsanso zida zapadziko lapansi kudzera mu njira yopangira yokha, ndikutsanzira statics ndi modal simulation ya zida zapadziko lapansi. Mu pepalali, zinthu za tetrahedron ndi hexahedron zimagwiritsidwa ntchito makamaka kugawa ma mesh, ndipo zotsatira zomaliza zimasanthulidwa kuti ziwone ngati mphamvu zake zakwaniritsidwa.

1, Kukhazikitsa chitsanzo ndi kusanthula zotsatira

Kupanga zitsanzo za zida za mapulaneti m'magawo atatu

Zida zapadziko lapansiKawirikawiri zimapangidwa ndi zida zozungulira, zida za dzuwa ndi zida zapadziko lapansi. Magawo akuluakulu omwe asankhidwa mu pepalali ndi awa: chiwerengero cha mano a mphete yamkati ya zida ndi 66, chiwerengero cha mano a zida za dzuwa ndi 36, chiwerengero cha mano a zida zapadziko lapansi ndi 15, m'mimba mwake wakunja wa mphete yamkati ya zida ndi 150 mm, modulus ndi 2 mm, ngodya ya kuthamanga ndi 20 °, m'lifupi mwa dzino ndi 20 mm, coefficient yowonjezereka ya kutalika ndi 1, coefficient ya backlash ndi 0.25, ndipo pali zida zitatu zapadziko lapansi.

Kusanthula kosasunthika kwa zida zamapulaneti

Fotokozani makhalidwe a zinthu: lowetsani dongosolo la zida za mapulaneti la magawo atatu lomwe lajambulidwa mu pulogalamu ya UG mu ANSYS, ndikuyika magawo a zinthuzo, monga momwe zasonyezedwera mu Table 1 pansipa:

Meshing: Mesh ya chinthu chocheperako imagawidwa ndi tetrahedron ndi hexahedron, ndipo kukula koyambira kwa chinthucho ndi 5mm. Popezazida zapadziko lapansi, giya la dzuwa ndi mphete yamkati ya giya zili mkati mwa maukonde ndi maukonde, maukonde a zigawo zolumikizirana ndi maukonde ndi okhuthala, ndipo kukula kwake ndi 2mm. Choyamba, ma gridi a tetrahedral amagwiritsidwa ntchito, monga momwe zasonyezedwera pa Chithunzi 1. Zinthu 105906 ndi ma node 177893 zimapangidwa zonse. Kenako gridi ya hexahedral imagwiritsidwa ntchito, monga momwe zasonyezedwera pa Chithunzi 2, ndipo maselo 26957 ndi ma node 140560 zimapangidwa zonse.

Kugwiritsa ntchito katundu ndi malire: malinga ndi makhalidwe ogwirira ntchito a zida zapadziko lapansi mu chochepetsera, zida za dzuwa ndi zida zoyendetsera, zida zapadziko lapansi ndi zida zoyendetsedwa, ndipo zotsatira zomaliza zimadutsa mu chonyamulira chapadziko lapansi. Konzani mphete yamkati ya zida mu ANSYS, ndikuyika torque ya 500N · m ku zida za dzuwa, monga momwe zasonyezedwera pa Chithunzi 3.

Kusanthula zotsatira pambuyo pa kukonza ndi zotsatira: Displacement nephogram ndi equivalent stress nephogram ya static analysis yomwe yapezeka kuchokera ku magawo awiri a grid yaperekedwa pansipa, ndipo kusanthula kofananira kumachitika. Kuchokera ku displacement nephogram ya mitundu iwiri ya ma grid, zapezeka kuti displacement yayikulu imachitika pamalo pomwe sun gear siimalumikizana ndi planetary gear, ndipo kupsinjika kwakukulu kumachitika pamzu wa gear mesh. Kupsinjika kwakukulu kwa tetrahedral grid ndi 378MPa, ndipo kupsinjika kwakukulu kwa hexahedral grid ndi 412MPa. Popeza malire a zokolola za zinthuzo ndi 785MPa ndipo chitetezo ndi 1.5, kupsinjika kololedwa ndi 523MPa. Kupsinjika kwakukulu kwa zotsatira zonse ziwiri ndi kochepa kuposa kupsinjika kololedwa, ndipo zonse zimakwaniritsa zofunikira zamphamvu.

2, Mapeto

Kudzera mu kuyerekezera kwa finite element ya planetary gear, displacement deformation nephogram ndi equivalent stress nephogram ya gear system zimapezeka, komwe deta yayikulu komanso yocheperako komanso kufalikira kwawo muzida zapadziko lapansiChitsanzocho chingapezeke. Malo omwe mano a giya amalephera kugwira ntchito bwino ndi komwe mano a giya amatha kulephera kugwira ntchito, choncho chisamaliro chapadera chiyenera kuperekedwa pakupanga kapena kupanga. Kudzera mu kusanthula dongosolo lonse la zida zapadziko lapansi, cholakwika chomwe chimayambitsidwa ndi kusanthula dzino limodzi lokha la giya chimathetsedwa.