| Mkhalidwe wa ntchito | fs | fL | Pa mfundo, malo amodzi pazipita katundu kutikuphaThandizo liyenera kugwiritsidwa ntchito ngati mtengo wowerengera, womwe uyenera kuphatikiza katundu wowonjezera ndi mayeso oyesa. Osaphatikizidwa muzogwiritsidwa ntchito patebulo, static safety factor fs ikhoza kusankhidwa potengera momwe ntchito ikugwiritsidwira ntchito ndi ntchito patebulo. Mf=Nthawi yokhotakhota pa katundu wopanda kanthu M= Nthawi yogubuduza ya matalikidwe apamwamba imagwiritsidwa ntchito kuti ma static security coefficient fs atenge 1.45, chifukwa cha kuchuluka kwa katundu ndi ntchito zolemetsa, ndibwino kusankha mizere yambiri.kupha. | |||
| Chingwe choyandama (katundu) | 1.10 | 1.0 | ||||
| Mobile crane (katundu) | ||||||
| Crane yapamadzi yam'madzi | ||||||
| zida zowotcherera | ||||||
| Table (ntchito mosalekeza) | ||||||
| Tower Crane | * Kuzungulira pamwamba | Mf≤0.5M | 1.25 | 1.0 | ||
| 0.5M≤Mf≤0.8M | 1.15 | |||||
| Mf≥0.8M | 1.25 | |||||
| kuzungulira m'munsi | 1.0 | |||||
| Kireni yozungulira (katundu wonyamula katundu) | 1.15 | |||||
| Chombo chotumizira | ||||||
| l sitima Loader / unloader | ||||||
| Metallurgical onenepa makina | 1.45** | 1.5 | ||||
| Crane yam'manja (kugwira kapena kugwira ntchito yolemetsa) | 1.7 | |||||
| Crane yozungulira (kugwira kapena kuyamwa) | ||||||
| Crane ya Bridge (kugwira kapena kuyamwa) | ||||||
| Crane yoyandama (kunyamula kapena kuyamwa) | ||||||
| 2.15 | |||||
| Stacker-reclaimer | ||||||
| Cantilevered conveyor | ||||||
| Makina a Offshore onenepa kwambiri | Muyezo wapadera | M'mapulogalamuwa, ntchito zogwirira ntchito zimasiyana kwambiri, monga chithandizo cha rotary chomwe chimagwiritsidwa ntchito posinthasintha kosasinthasintha, cheke chokhazikika chokha.Pa chithandizo cha rotary chomwe chimagwiritsidwa ntchito pozungulira mosalekeza ndi kasinthasintha pakanthawi, kuwerengera kwamoyo kosinthika ndikofunikira. | ||||
| Sitima yapamtunda | 1.00 | |||||
| Deck crane (katundu wonyamula katundu) | ||||||
| Stacker | 1.10 | |||||
| Ngolo yotumizira | ||||||
| Chofufutira chingwe / chidebe cha chingwe | 1.25 | |||||
| Zocheperapo kapena zofanana ndi 1.5 M3 hydraulic excavator | 1.45 | |||||
| Kupitilira 1.5 M3 hydraulic excavator | Muyezo wapadera | |||||
| ladle turret | 1.75 | |||||
Zindikirani: fL ndiye chinthu chachitetezo champhamvu.Iyenera kugwiritsidwa ntchito limodzi ndi dynamic load curve.Zimachokera ku zochitika ndi kuyesera.Ndilofunikanso kutengera kuchuluka kwa ntchito.
Mwachitsanzo: Chithunzi cha portal crane
Njira yowerengera kuchuluka kwa katundu ikulimbikitsidwa motere:
Musanasankhe chithandizo chozungulira, static chitetezo factor fs chomwe chiyenera kuganiziridwa kwa wolandirayo chiyenera kutsimikiziridwa, chomwe chingapezeke mu ndondomeko 1. Portal crane:fs=1.45
Pamene chiwerengero chachikulu cha static chimadziwika, ndondomeko yowerengera katundu wake ndi motere:
1) kuchuluka kogwira ntchito kwamphamvu yamphepo yamitundu isanu ndi itatu
mphamvu ya axial Fa = Q + A + O + G
mphindi yakugubuduza M = Q × lmax + A × amax + W × r – O × o – G × g
2) Mosasamala kanthu za mphamvu ya mphepo, lingalirani za kuchuluka kwa mayeso 25%.
mphamvu ya axial Fa = 1.25 × Q + A + O + G
kugubuduza mphindi M = 1.25 × Q × lmax + A × amax – O × o – G ×
Chitsanzo: katundu wogwira ntchito ndi matalikidwe a doko la clamshell amadziwika motere:
Q = 260 kN lmax = 23 m 1max=23m
A = 75 kN amax = 11 m max = 11m
O = 450 kN o = 0,75 m o = 0.75m
G = 900 kN g = 3 m g=3m
W = 27 kN r = 6.5 m1） r = 6.5m
Kuchuluka kwamphamvu kwamphamvu yamphepo pamlingo 8
Fa = Q + A + O + G
=260 + 75 + 450 + 900
= 1685 kN
M = Q×lmax + A×amax + W×r – O × o – G× g
=260 × 23 + 75 × 11 + 27 × 6.5×450 × 0.75×900 × 3
= 3943 kNm
2) mosasamala kanthu za mphamvu ya mphepo, ganizirani kuchuluka kwa ntchito kwa 25%.
Fa = 1.25×Q + A + O + G
=325 +75 +450 +900
= 1750kN
M = 1.25×Q×lmax + A×amax – O×o – G×g
= 325 × 23 + 75 × 11×45 × 0.75×900 × 3
= 5566.3 kNm
3) kuchuluka kogwira ntchito mosasamala kanthu za mphamvu ya mphepo
Fa = 1685 kN
M = Q×lmax + A×amax – O×o – G×g
= 260 × 23 + 75 × 11×450 × 0.75×900 × 3
= 3767.5 kNm
Load condition 2 imagwiritsidwa ntchito ngati kuwerengera kosasunthika
Malinga ndi ndandanda 1, crane ya portal (chidebe chonyamulira) iyenera kuthandizidwa ndi mizere itatu yothandizira yozungulira:
Kuyika kwa static kwa chithandizo cha rotary ndi:
Fa＇ = 1750 kN × 1.45 = 2537.5 kN M＇= 5566.3 kNm × 1.45 = 8071.1 kNm
Kuwerengera kwa bolt ndi:
Fa = 1750 kN M = 5566.3 kNm
Malinga ndi zotsatira zowerengera pamwambapa, kusankha kwa curve yonyamula mphamvu kumatha kutsimikiziridwa kuti musankhe chithandizo chozungulira cha 13 * .45.2000.002
Kufotokozera pamwamba ndi mwatsatanetsatane mawerengedwe njira yakuphakukula.Malingana ndi zotsatira zowerengera, mukhoza kusankha zoyenerakuphamodel m'malo athukalozera wazinthu.Ngati simukudziwa kuwerengera, chonde omasuka kulankhula nafe ndi imelo.Tidzakutumikirani ndi mtima wonse!
Nthawi yotumiza: Apr-08-2021