| Yanayin aikace-aikace | fs | fL | A ka'ida, matsakaicin matsakaicin nauyin da kekashe kaidole ne a yi amfani da goyon baya azaman ƙididdiga, wanda dole ne ya haɗa da ƙarin kaya da gwajin gwaji. Ba a haɗa shi a cikin aikace-aikacen a cikin tebur ba, za a iya zaɓar madaidaicin aminci factor fs ta hanyar la'akari da yanayin aiki iri ɗaya da aikace-aikace a cikin tebur. Mf=Maida jujjuyawa lokacin akan komai M= Ana amfani da lokacin jujjuya mafi girman girman don aikace-aikacen daidaitaccen amintaccen amintaccen fs don ɗaukar 1.45, saboda matsakaicin matsakaicin nauyi da yanayin aiki mai nauyi, yana da kyau a zaɓi mirgine-jere da yawa.kashe kai. | |||
| Crane mai iyo (kaya) | 1.10 | 1.0 | ||||
| Kirjin wayar hannu (kaya) | ||||||
| Kirjin jirgin ruwa | ||||||
| kayan walda | ||||||
| Tebur (aiki na ci gaba) | ||||||
| Tower crane | * Juyawa a saman | Mf≤0.5M | 1.25 | 1.0 | ||
| 0.5M≤Mf≤0.8M | 1.15 | |||||
| Mf≥0.8M | 1.25 | |||||
| juyawa a gindi | 1.0 | |||||
| Kirjin jujjuyawa (nauyin kaya) | 1.15 | |||||
| Kirjin jigilar kaya | ||||||
| l jirgin Loader/unloader | ||||||
| Metallurgical na'ura mai kiba | 1.45** | 1.5 | ||||
| Crane na hannu (kama ko rike aiki mai nauyi) | 1.7 | |||||
| Kirjin jujjuyawa (kama ko tsotsa) | ||||||
| Gada crane (kama ko tsotsa) | ||||||
| Crane mai iyo (kama ko tsotsa) | ||||||
| 2.15 | |||||
| Stacker-reclaimer | ||||||
| Cantilevered conveyor | ||||||
| Injin kiba a cikin teku | Matsayi na musamman | A cikin waɗannan aikace-aikacen, yanayin aiki ya bambanta sosai, kamar goyan bayan jujjuya da aka yi amfani da shi don jujjuyawar yau da kullun, kawai a tsaye cak.Don tallafin rotary da aka yi amfani da shi a ci gaba da jujjuyawa da jujjuyawar lokaci, ana buƙatar lissafin rayuwa mai ƙarfi. | ||||
| Crane na jirgin kasa | 1.00 | |||||
| Kirjin bene (nauyin kaya) | ||||||
| Stacker | 1.10 | |||||
| Keken bayarwa | ||||||
| igiya excavator/kebul guga | 1.25 | |||||
| Kasa da ko dai-dai da 1.5 M3 na'ura mai aiki da ruwa | 1.45 | |||||
| Fiye da 1.5 M3 na'ura mai aiki da karfin ruwa excavator | Matsayi na musamman | |||||
| leda turret | 1.75 | |||||
Lura: fL shine yanayin aminci mai ƙarfi.Dole ne a yi amfani da shi a hade tare da lanƙwan kaya mai ƙarfi.Ya zo daga kwarewa da gwaji.Ƙimar tunani ce bisa matsakaicin nauyin aiki.
Misali: Tsarin crane portal
Ana ba da shawarar hanyar lissafin matsakaicin nauyi kamar haka:
Kafin zabar goyan bayan rotary, yakamata a ƙayyade ma'aunin aminci na fs wanda yakamata a yi la'akari da shi ga mai watsa shiri, wanda za'a iya samu a cikin jadawalin 1. Portal crane: fs=1.45
Lokacin da aka san matsakaicin matsakaicin nauyi, tsarin lissafin nauyinsa shine kamar haka:
1) matsakaicin nauyin aiki na ƙarfin iska mai mataki takwas
Axial Force Fa = Q + A + O + G
Juyawa lokacin M = Q × lmax + A × amax + W × r – O × o – G × g
2) Ko da kuwa ƙarfin iska, la'akari da nauyin 25% gwajin gwajin
Ƙarfin axial Fa = 1.25 × Q + A + O + G
Juyawa lokacin M = 1.25 × Q × lmax + A × amax – O × o – G ×
Misali: nauyin aiki da girman tashar tashar jirgin ruwa an san su kamar haka:
Q = 260 kN lmax = 23 m 1max = 23m
A = 75 kN amax = 11 m amax=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
Matsakaicin nauyin aiki na wutar lantarki a matakin 8
Fa = Q + A + O + G
=260 + 75 + 450 + 900
= 1685 kN
M = Q×lmax + A×max + W×r - O × o - G× g
=260 × 23 + 75 × 11 + 27 × 6.5 × 450 × 0.75 × 900 × 3
= 3943 kNm
2) ba tare da la'akari da ƙarfin iska ba, la'akari da matsakaicin nauyin aiki na 25% gwajin gwaji
Fa = 1.25×Q + A + O + G
=325 +75 +450 +900
= 1750kN
M = 1.25×Q×lmax + A×max - O×o - G×g
= 325 × 23 + 75 × 11 × 45 × 0.75 × 900 × 3
= 5566.3 kNm
3) matsakaicin nauyin aiki ba tare da la'akari da ƙarfin iska ba
Fa = 1685 kN
M = Q ×lmax + A × max – O×o – G×g
= 260 × 23 + 75 × 11 × 450 × 0.75 × 900 × 3
= 3767.5 kNm
Ana amfani da yanayin ɗaukar nauyi 2 azaman nauyin aiki na lissafin tsaye
Dangane da jadawalin 1, crane portal (guga kama) yakamata a sami goyan bayan layuka uku na tallafin juzu'i irin na nadi:
Matsakaicin nauyin goyan bayan rotary shine:
Fa = 1750 kN × 1.45 = 2537.5 kN M＇= 5566.3 kNm × 1.45 = 8071.1 kNm
Ƙididdigar ƙididdiga na bolt shine:
Fa = 1750 kN M = 5566.3 kNm
Dangane da sakamakon lissafin da ke sama, za'a iya ƙayyade zaɓin madaidaicin ƙarfin ɗaukar nauyi don zaɓar tallafin juyawa na 13*.45.2000.002
Bayanin da ke sama shine cikakken hanyar lissafinkashe kaigirman.Bisa ga sakamakon lissafin, za ku iya zaɓar wanda ya dacekashe kaimodel a cikin mukasida samfurin.Idan baku san yadda ake lissafta ba, da fatan za ku iya tuntuɓar mu ta imel.Za mu bauta muku da zuciya ɗaya!
Lokacin aikawa: Afrilu-08-2021