Raws li lub tshuab kis tau tus mob, cov iav planetary siv dav hauv ntau yam kev xyaum ua haujlwm engineering, xws li cov iav reducer, crane, planetary iav reducer, thiab lwm yam. Rau cov iav reducer planetary, nws tuaj yeem hloov lub tshuab kis tau tus mob ntawm lub tsheb ciav hlau qag ruaj khov hauv ntau qhov xwm txheej. Vim tias cov txheej txheem ntawm kev kis tau tus mob iav yog kab sib cuag, lub sijhawm ntev meshing yuav ua rau iav tsis ua haujlwm, yog li nws yog qhov tsim nyog los simulate nws lub zog. Li Hongli et al. siv txoj kev meshing tsis siv neeg los mesh lub iav planetary, thiab tau txais tias lub zog thiab qhov siab tshaj plaws yog linear. Wang Yanjun et al. kuj tau mesh lub iav planetary los ntawm txoj kev tsim tsis siv neeg, thiab simulate qhov statics thiab modal simulation ntawm cov iav planetary. Hauv daim ntawv no, tetrahedron thiab hexahedron ntsiab lus feem ntau yog siv los faib cov mesh, thiab cov txiaj ntsig kawg tau soj ntsuam kom pom tias cov xwm txheej muaj zog tau ntsib.

1. Kev tsim qauv thiab kev tshuaj xyuas cov txiaj ntsig

Kev tsim qauv peb sab ntawm cov iav planetary

Cov iav planetaryfeem ntau yog tsim los ntawm cov iav nplhaib, iav hnub thiab iav planetary. Cov yam ntxwv tseem ceeb xaiv hauv daim ntawv no yog: tus naj npawb ntawm cov hniav ntawm lub nplhaib iav sab hauv yog 66, tus naj npawb ntawm cov hniav ntawm lub iav hnub yog 36, tus naj npawb ntawm cov hniav ntawm lub iav planetary yog 15, lub cheeb sab nraud ntawm lub nplhaib iav sab hauv yog 150 hli, lub modulus yog 2 hli, lub kaum sab xis yog 20 °, qhov dav ntawm cov hniav yog 20 hli, qhov siab ntxiv yog 1, qhov backlash coefficient yog 0.25, thiab muaj peb lub iav planetary.

Kev tshuaj xyuas zoo li qub ntawm cov iav planetary

Txhais cov khoom siv: import lub kaw lus iav peb-seem uas kos hauv UG software rau hauv ANSYS, thiab teeb tsa cov khoom siv, raws li qhia hauv Rooj 1 hauv qab no:

Meshing: Lub mesh finite element yog faib los ntawm tetrahedron thiab hexahedron, thiab qhov loj me ntawm lub ntsiab lus yog 5 hli. Txij li thaum lubcov iav planetary, lub hnub iav thiab lub nplhaib iav sab hauv yog nyob rau hauv kev sib cuag thiab mesh, lub mesh ntawm kev sib cuag thiab mesh qhov chaw yog densified, thiab qhov loj yog 2 hli. Ua ntej, tetrahedral grids yog siv, raws li qhia hauv Daim Duab 1. 105906 cov ntsiab lus thiab 177893 nodes yog generated nyob rau hauv tag nrho. Tom qab ntawd hexahedral grid yog saws, raws li qhia hauv Daim Duab 2, thiab 26957 cell thiab 140560 nodes yog generated nyob rau hauv tag nrho.

Daim ntawv thov thauj khoom thiab cov xwm txheej ciam teb: raws li cov yam ntxwv ua haujlwm ntawm lub iav planetary hauv lub reducer, lub hnub iav yog lub iav tsav, lub ntiaj teb iav yog lub iav tsav, thiab qhov tso zis kawg yog los ntawm lub ntiaj teb nqa khoom. Kho lub nplhaib iav sab hauv hauv ANSYS, thiab siv lub zog ntawm 500N · m rau lub hnub iav, raws li pom hauv Daim Duab 3.

Kev ua tiav tom qab thiab kev tshuaj xyuas cov txiaj ntsig: Daim duab displacement nephogram thiab equivalent stress nephogram ntawm kev tshuaj xyuas static tau los ntawm ob qhov kev faib grid tau muab rau hauv qab no, thiab kev tshuaj xyuas sib piv tau ua. Los ntawm daim duab displacement nephogram ntawm ob hom grids, nws pom tias qhov siab tshaj plaws displacement tshwm sim ntawm qhov chaw uas lub hnub iav tsis sib haum nrog lub ntiaj teb iav, thiab qhov siab tshaj plaws tshwm sim ntawm cov hauv paus ntawm lub iav mesh. Qhov siab tshaj plaws ntawm tetrahedral grid yog 378MPa, thiab qhov siab tshaj plaws ntawm hexahedral grid yog 412MPa. Txij li thaum qhov txwv ntawm cov khoom siv yog 785MPa thiab qhov kev nyab xeeb yog 1.5, qhov kev ntxhov siab tso cai yog 523MPa. Qhov siab tshaj plaws ntawm ob qho txiaj ntsig yog tsawg dua qhov kev ntxhov siab tso cai, thiab ob qho tib si ua tau raws li cov xwm txheej muaj zog.

2. Xaus lus

Los ntawm kev sim ua lub ntsiab lus kawg ntawm lub iav planetary, qhov kev hloov pauv deformation nephogram thiab kev ntxhov siab sib npaug ntawm lub iav system tau txais, los ntawm qhov twg cov ntaub ntawv siab tshaj plaws thiab tsawg kawg nkaus thiab lawv cov kev faib tawm hauvcov iav planetaryqauv tuaj yeem pom. Qhov chaw ntawm qhov siab tshaj plaws sib npaug kuj yog qhov chaw uas cov hniav iav feem ntau yuav ua tsis tiav, yog li yuav tsum tau them sai sai rau nws thaum lub sijhawm tsim lossis tsim khoom. Los ntawm kev tshuaj xyuas ntawm tag nrho lub kaw lus ntawm cov iav planetary, qhov yuam kev tshwm sim los ntawm kev tshuaj xyuas ntawm tsuas yog ib lub hniav iav raug kov yeej.