| Boemo ba kopo | fs | fL | Ka molao-motheo, palo e kahodimodimo e tsitsitseng mojaro horeho belehatšehetso e tlameha ho sebelisoa e le boleng ba ho bala, bo tlamehang ho kenyelletsa mojaro o eketsehileng le mojaro oa teko. Ha e kenyelelitsoe ho kopo tafoleng, static safety factor fs e ka khethoa ho latela maemo a ts'ebetso a ts'oanang le likopo tse tafoleng. Mf=Motsotso o phetholang morao ka mor'a mojaro o se nang letho M= Nako ea ho phethoha ha amplitude e phahameng e sebelisoa bakeng sa kopo ea static Safety coefficient fs ho nka 1.45, ka lebaka la mojaro o phahameng le maemo a boima a ho sebetsa, ho molemo ho khetha ho roala mela e mengata.ho beleha. | |||
| Crane e phaphametseng (phahlo) | 1.10 | 1.0 | ||||
| Mobile crane (cargo) | ||||||
| Crane ea sekepe sa metsing | ||||||
| thepa ea ho cheselletsa | ||||||
| Tafole (ts'ebetso e tsoelang pele) | ||||||
| Tower crane | * Ho potoloha holimo | Mf≤0.5M | 1.25 | 1.0 | ||
| 0.5M≤Mf≤0.8M | 1.15 | |||||
| Mf≥0.8M | 1.25 | |||||
| ho potoloha botlaaseng | 1.0 | |||||
| Rotation crane (moroalo oa thepa) | 1.15 | |||||
| Crane ea ho tsamaisa thepa | ||||||
| l sekepe Loader/unloader | ||||||
| Metallurgical overweight machine | 1.45** | 1.5 | ||||
| Crane ea mohala (ho tšoara kapa ho tšoara mosebetsi o boima) | 1.7 | |||||
| Crane ea ho potoloha (ho tšoara kapa ho sucker) | ||||||
| Crane ea borokho (ho tšoara kapa ho sucker) | ||||||
| Crane e phaphametseng (ho nka kapa ho sucker) | ||||||
| 2.15 | |||||
| Stacker-reclaimer | ||||||
| Cantilevered conveyor | ||||||
| Mochini o motenya oa mose ho maoatle | Tekanyetso e khethehileng | Likopong tsena, maemo a ts'ebetso a fapana haholo, joalo ka ts'ehetso ea rotary e sebelisoang bakeng sa ho potoloha ka mokhoa o sa tloaelehang, ke tlhahlobo e tsitsitseng feela.Bakeng sa tšehetso ea rotary e sebelisoang ho potoloha ho tsoelang pele le ho potoloha ha nakoana, ho hlokahala palo e matla ea bophelo. | ||||
| Seporo sa terene | 1.00 | |||||
| Deck crane (moroalo oa thepa) | ||||||
| Stacker | 1.10 | |||||
| Koloi ea thepa | ||||||
| Moepi oa lithapo/emere ea thapo | 1.25 | |||||
| Ka tlase ho kapa ho lekana le 1.5 M3 hydraulic excavator | 1.45 | |||||
| Ho feta 1.5 M3 hydraulic excavator | Tekanyetso e khethehileng | |||||
| ladle turret | 1.75 | |||||
Tlhokomeliso: fL ke ntlha e matla ea polokeho.E tlameha ho sebelisoa hammoho le dynamic load curve.E tsoa phihlelong le tekong.Ke boleng ba litšupiso bo ipapisitseng le boholo ba mosebetsi.
Mohlala: Setšoantšo sa portal crane
Mokhoa oa ho bala oa mojaro o phahameng o khothaletsoa ka tsela e latelang:
Pele o khetha ts'ehetso ea rotary, static safety factor fs e lokelang ho nahanoa bakeng sa moamoheli e lokela ho khethoa, e ka fumanoang lenaneong la 1. Portal crane:fs=1.45
Ha palo e kholo ea static e tsejoa, mokhoa oa ho bala oa mojaro oa eona o tjena:
1) boholo ba mosebetsi o boima oa matla a moea a mekhahlelo e robeli
matla a axial Fa = Q + A + O + G
motsotso oa ho phethola M = Q × lmax + A × amax + W × r – O × o – G × g
2) Ho sa tsotelehe matla a moea, nahana ka mojaro oa 25% mojaro oa teko
axial force Fa = 1.25 × Q + A + O + G
motsotso oa ho phethola M = 1.25 × Q × lmax + A × amax – O × o – G ×
Mohlala: mojaro o sebetsang le boholo ba boema-kepe ba clamshell bo tsejoa ka tsela e latelang:
Q = 260 kN lmax = 23 m 1max=23m
A = 75 kN max = 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
Boholo ba matla a ho sebetsa a matla a moea boemong ba 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) ho sa tsotelehe matla a moea, nahana ka mojaro o moholo oa ho sebetsa oa 25% mojaro oa liteko
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) boholo ba ho sebetsa ho sa tsotelehe matla a moea
Fa = 1685 kN
M = Q×lmax + A×amax – O×o – G×g
= 260 × 23 + 75 × 11×450 0.75×900 × 3
= 3767.5 kNm
Boemo ba mojaro 2 bo sebelisoa e le mojaro o sebetsang oa lipalo tse tsitsitseng
Ho latela kemiso ea 1, crane ea portal (bakete ea ho ts'oara) e lokela ho ts'ehetsoa ke mela e meraro ea tšehetso ea mofuta oa roller:
Tšebeliso e tsitsitseng ea tšehetso ea rotary ke:
Fa＇ = 1750 kN × 1.45 = 2537.5 kN M＇= 5566.3 kNm × 1.45 = 8071.1 kNm
Palo ea lipalo tsa bolt ke:
Fa = 1750 kN M = 5566.3 kNm
Ho ea ka liphetho tsa lipalo tse ka holimo, khetho ea curve ea bearing capacity e ka ikemisetsa ho khetha tšehetso ea rotary ea 13 * .45.2000.002
Tlhaloso e ka holimo ke mokhoa o qaqileng oa ho bala oaho belehaboholo.Ho ea ka liphetho tsa lipalo, u ka khetha tse loketsengho belehamohlala ho ronalethathamo la lihlahisoa.Haeba u sa tsebe ho bala, ka kopo ikutloe u lokolohile ho ikopanya le rona ka lengolo-tsoibila.Re tla u sebeletsa ka pelo eohle!
Nako ea poso: Apr-08-2021