| Daim ntawv thov xwm txheej | fs | fL | Raws li txoj cai, static siab tshaj load uas lubslewing bearingkev txhawb nqa yuav tsum tau siv los ua tus nqi suav, uas yuav tsum suav nrog kev thauj khoom ntxiv thiab kev xeem thauj khoom. Tsis suav nrog hauv daim ntawv thov hauv lub rooj, qhov kev nyab xeeb zoo li qub fs tuaj yeem raug xaiv los ntawm kev siv cov kev ua haujlwm zoo sib xws thiab cov ntawv thov hauv lub rooj. Mf = Rov qab rov qab lub sijhawm ntawm qhov khoob khoob M = Lub sijhawm dhau los ntawm qhov siab tshaj plaws amplitude yog siv rau daim ntawv thov kev nyab xeeb zoo li qub fs coj 1.45, vim tias qhov nruab nrab siab thiab hnyav ua haujlwm, nws yog qhov zoo dua los xaiv ntau kab dov.slewing bearing. | |||
| Floating crane (cov khoom thauj) | 1.10 | 1.0 | ||||
| Mobile crane (cov khoom thauj) | ||||||
| Marine lawj crane | ||||||
| cov khoom siv vuam | ||||||
| Table (ua haujlwm txuas ntxiv) | ||||||
| Ntauwd crane | * Kev sib hloov ntawm sab saum toj | Mf≤0.5M | 1.25 | 1.0 | ||
| 0.5M≤Mf≤0.8M | 1.15 | |||||
| Mf≥0.8M | 1.25 | |||||
| kev sib hloov ntawm lub hauv paus | 1.0 | |||||
| Kev sib hloov crane (cargo load) | 1.15 | |||||
| Shipping crane | ||||||
| l nkoj Loader / unloader | ||||||
| Metallurgical overweight tshuab | 1.45 * 1.45 hli | 1.5 | ||||
| Mobile crane (los yog tuav haujlwm hnyav) | 1.7 | |||||
| Kev sib hloov crane (los yog nqus) | ||||||
| Choj Crane (los yog nqus) | ||||||
| Floating Crane (nqa los yog nqus) | ||||||
| 2.15 | |||||
| Stacker-reclaimer | ||||||
| Cantilevered conveyor siv | ||||||
| Offshore overweight tshuab | Tus qauv tshwj xeeb | Nyob rau hauv cov ntawv thov no, cov kev ua haujlwm sib txawv heev, xws li kev txhawb nqa rotary siv rau qhov kev sib hloov tsis tu ncua, tsuas yog kev kuaj zoo li qub.Rau cov kev txhawb nqa teb siv nyob rau hauv kev sib hloov tas mus li thiab kev sib hloov sib hloov, yuav tsum muaj kev suav lub neej dynamic. | ||||
| Railway crane | 1.00 Nws | |||||
| Deck crane (cov khoom thauj khoom) | ||||||
| Stacker | 1.10 | |||||
| Delivery wagon | ||||||
| Rope excavator / cable thoob | 1.25 | |||||
| Tsawg dua los yog sib npaug rau 1.5 M3 hydraulic excavator | 1.45 Nws | |||||
| Ntau tshaj 1.5 M3 hydraulic excavator | Tus qauv tshwj xeeb | |||||
| ladle turret | 1.75 ib | |||||
Nco tseg: fL yog qhov kev nyab xeeb zoo tshaj plaws.Nws yuav tsum tau siv ua ke nrog dynamic load nkhaus.Nws los ntawm kev paub thiab kev sim.Nws yog tus nqi siv raws li kev ua haujlwm siab tshaj plaws.
Piv txwv li: Lub portal crane daim duab
Txoj kev suav ntawm qhov siab tshaj plaws yog pom zoo raws li hauv qab no:
Ua ntej xaiv qhov kev them nyiaj yug, qhov kev nyab xeeb zoo li qub fs uas yuav tsum tau txiav txim siab rau tus tswv tsev yuav tsum tau txiav txim siab, uas tuaj yeem pom hauv lub sijhawm 1. Portal crane: fs = 1.45
Thaum paub qhov siab tshaj plaws static load, cov qauv ntawm nws cov load yog raws li nram no:
1) lub siab tshaj plaws ua hauj lwm load ntawm yim-theem cua quab yuam
axial force Fa = Q + A + O + G
overturning moment M = Q × lmax + A × amax + W × r – O × o – G × g
2) Tsis hais lub zog cua, xav txog qhov load ntawm 25% kuaj load
axial quab yuam Fa = 1.25 × Q + A + O + G
Lub sij hawm hloov M = 1.25 × Q × lmax + A × amax - O × o - G ×
Piv txwv li: qhov ua hauj lwm load thiab amplitude ntawm lub clamshell chaw nres nkoj yog paub raws li nram no:
Q = 260 kN lmax = 23 m 1max = 23 m
A = 75 kN amax = 11 m amax = 11 m
O = 450 kN o = 0.75 m o = 0.75 m
G = 900 kN g = 3 m g = 3 m
W = 27 kN r = 6.5 m1) r = 6.5m
Kev ua haujlwm siab tshaj plaws ntawm cua zog ntawm qib 8
Fa = Q + A + O + G
= 260 + 75 + 450 + 900
= 1685 TZS
M = Q × lmax + A × amax + W × r – O × o – G × g
Luas = 260 × 23 + 75 × 11 + 27 × 6.5 × 450 × 0.75 × 900 × 3
= 3943 kNm
2) tsis hais lub zog cua, xav txog qhov ua haujlwm siab tshaj plaws ntawm 25% kuaj load
Faa = 1.25 × Q + A + O + G
= 325+75+450+900
= 1750 kN
M = 1.25 × Q × lmax + A × amax - O × o - G × g
Luas = 325 × 23 + 75 × 11 × 45 × 0.75 × 900 × 3
= 5566.3 kNm
3) Ua haujlwm siab tshaj plaws tsis hais lub zog cua
F = 1685 kN
M = Q × lmax + A × amax - O × o - G × g
Luas = 260 × 23 + 75 × 11 × 450 × 0.75 × 900 × 3
= 3767.5 kNm
Load condition 2 yog siv raws li kev ua hauj lwm load ntawm static xam
Raws li lub sijhawm 1, lub portal crane (lub thoob) yuav tsum tau txais kev txhawb nqa los ntawm peb kab ntawm cov menyuam-hom kev txhawb nqa:
Lub static reference load ntawm rotary kev them nyiaj yug yog:
Fa＇ = 1750 kN × 1.45 = 2537.5 kN M = 5566.3 kNm × 1.45 = 8071.1 kNm
Kev suav load ntawm bolt yog:
Fa = 1750 kN M = 5566.3 kNm
Raws li cov txiaj ntsig ntawm kev suav sau saum toj no, kev xaiv cov kabmob muaj peev xwm nkhaus tuaj yeem txiav txim siab xaiv qhov kev txhawb nqa rotary ntawm 13 *.45.2000.002.
Cov lus piav qhia saum toj no yog cov ncauj lus kom ntxaws txog kev suav ntawmslewing bearingqhov loj.Raws li kev suav cov txiaj ntsig, koj tuaj yeem xaiv qhov tsim nyogslewing bearingqauv hauv pebcov khoom catalog.Yog tias koj tsis paub yuav suav li cas, thov koj xav tiv tauj peb los ntawm email.Peb yuav pab koj tag nrho lub siab dawb paug!
Post lub sij hawm: Apr-08-2021