Indlela yokuchonga i-Roller Chain Safety Factor

Indlela yokuchonga i-Roller Chain Safety Factor

Kwiinkqubo zothumelo lwemizi-mveliso, ukhuseleko lwe-roller chain lumisela ngokuthe ngqo uzinzo lokusebenza kwesixhobo, ubomi benkonzo, kunye nokhuseleko lwabasebenzisi. Nokuba kuthumelo olunzima kumatshini wemigodi okanye ukuhambisa ngokuchanekileyo kwimigca yemveliso ezenzekelayo, ukhuseleko olubekwe ngendlela engalunganga lunokukhokelela ekwaphukeni kwe-chain ngaphambi kwexesha, ixesha lokungasebenzi kwezixhobo, kwaneengozi. Eli nqaku liza kuchaza ngokucwangcisiweyo indlela yokuchonga ukhuseleko lwe-roller chain, ukusuka kwiingcamango ezisisiseko, amanyathelo aphambili, izinto ezinempembelelo, ukuya kwiingcebiso ezisebenzayo, ukunceda iinjineli, abathengi, kunye nabagcini bezixhobo benze izigqibo zokukhetha ezichanekileyo.

I. Ukuqonda Okusisiseko Ngento Yokhuseleko: Kutheni Ingu “Mgca Wokuphila” Wokukhetha Iintambo Zeroli

I-safety factor (SF) yi-ratio yomthamo wokwenene we-roller chain-bearing-wearing to the true load load. Ngokuyintloko, ibonelela "ngomda wokhuseleko" wokusebenza kwe-chain. Ayipheleli nje ekuthinteleni ukungaqiniseki okufana nokuguquguquka komthwalo kunye nokuphazamiseka kwendalo, kodwa ikwagubungela neengozi ezinokubakho ezifana neempazamo zokwenza i-chain kunye nokuphambuka kokufakwa. Luphawu oluphambili lokulinganisela ukhuseleko kunye neendleko.

1.1 Inkcazo ePhambili yeNjongo yoKhuseleko
Ifomula yokubala ukhuseleko yile: Ukhuseleko (SF) = Umthamo woMthwalo oLinganisiweyo weRoller Chain (Fₙ) / Umthwalo woMsebenzi wokwenyani (F_w).
Umthamo womthwalo olinganisiweyo (Fₙ): Umiselwa ngumenzi wetsheyini ngokusekelwe kwizinto, isakhiwo (ezifana nepitch kunye nobubanzi beroller), kunye nenkqubo yokuvelisa, ngokuqhelekileyo ibandakanya umlinganiselo womthwalo oguqukayo (umthwalo ohambelana nobomi bokudinwa) kunye nomlinganiselo womthwalo ongashukumiyo (umthwalo ohambelana nokuqhekeka kwangoko). Oku kunokufumaneka kwiikhathalogu zemveliso okanye kwimigangatho efana ne-GB/T 1243 kunye ne-ISO 606.
Umthwalo Wokusebenza Wokwenyani (F_w): Umthwalo ophezulu onokumelana netsheyini xa isebenza ngokwenene. Le nto iqwalasela izinto ezifana nokuqala koxinzelelo, ukugqithiswa kakhulu, kunye nokuguquguquka kwemeko yokusebenza, endaweni yokuba ngumthwalo obalwa ngokwethiyori.

1.2 Imigangatho yoShishino lwezinto ezivumelekileyo zoKhuseleko
Iimfuneko zezinto zokhuseleko ziyahluka kakhulu kwiimeko ezahlukeneyo zesicelo. Ukubhekisa ngokuthe ngqo kwi "nto yokhuseleko evumelekileyo" echazwe yimigangatho yeshishini okanye yimigangatho yeshishini kubalulekile ukuze kuthintelwe iimpazamo zokukhetha. Oku kulandelayo yireferensi yezinto zokhuseleko ezivumelekileyo kwiimeko eziqhelekileyo zokusebenza (ngokusekwe kwi-GB/T 18150 kunye nemikhuba yeshishini):

II. Inkqubo yeCore enamanyathelo ama-4 yokuChonga izinto zoKhuseleko lweRoller Chain

Ukuchonga umba wokhuseleko akuyondlela ilula yokusebenzisa ifomula; kufuna uhlalutyo lwenyathelo ngenyathelo olusekelwe kwiimeko zokusebenza zokwenyani ukuqinisekisa idatha yomthwalo echanekileyo nethembekileyo kwinqanaba ngalinye. Le nkqubo ilandelayo iyasebenza kwiizicelo ezininzi ze-roller chain zemizi-mveliso.

Inyathelo 1: Chonga umthamo womthwalo olinganisiweyo we-roller chain (Fₙ).
Beka phambili ukufumana idatha kwikhathalogu yemveliso yomenzi. Nika ingqalelo kwi-"dynamic load rating" (edla ngokuhambelana neeyure ezili-1000 zobomi bokudinwa) kunye ne-"static load rating" (ehambelana ne-static tensile fracture) ephawulwe kwikhathalogu. Ezi zimbini mazisetyenziswe ngokwahlukeneyo (dynamic load rating kwiimeko zomthwalo oguqukayo, static load rating yomthwalo oguqukayo okanye iimeko zesantya esiphantsi).
Ukuba idatha yesampulu ayikho, izibalo zingenziwa ngokusekelwe kwimigangatho yesizwe. Ukuthatha i-GB/T 1243 njengomzekelo, umlinganiselo womthwalo oguqukayo we-roller chain (F₁) unokuqikelelwa kusetyenziswa le fomula: F₁ = 270 × (d₁)¹.⁸ (d₁ bububanzi bephini, nge-mm). Umlinganiselo womthwalo omileyo (F₂) umalunga nezihlandlo ezi-3-5 zomlinganiselo womthwalo oguqukayo (kuxhomekeke kwizinto eziphathekayo; izihlandlo ezi-3 zentsimbi yekhabhoni kunye nezihlandlo ezi-5 zentsimbi ye-alloy).

Ukulungiswa kweemeko zokusebenza ezikhethekileyo: Ukuba itsheyini isebenza kubushushu obungaphezulu kwe-120°C, okanye ukuba kukho ukugqwala (njengakwindawo eneekhemikhali), okanye ukuba kukho ukugqwala kothuli, umthamo womthwalo olinganisiweyo kufuneka uncitshiswe. Ngokubanzi, umthamo womthwalo uncitshiswa nge-10%-15% kuyo yonke i-100°C yokunyuka kobushushu; kwiindawo ezigqwala, unciphiso luyi-20%-30%.

Inyathelo lesi-2: Bala uMthwalo woMsebenzi wokwenyani (F_w)
Umthwalo wokwenyani wokusebenza yinguqu engundoqo ekubalweni kwezinto zokhuseleko kwaye kufuneka ubalwe ngokupheleleyo ngokusekelwe kuhlobo lwesixhobo kunye neemeko zokusebenza. Kuphephe ukusebenzisa "umthwalo wethiyori" endaweni yaso. Misela umthwalo wesiseko (F₀): Bala umthwalo wethiyori ngokusekelwe kusetyenziso olucetywayo lwesixhobo. Umzekelo, umthwalo wesiseko wetsheyini yokuhambisa = ubunzima bezinto + ubunzima betsheyini + ubunzima bebhanti yokuhambisa (konke kubalwa ngemitha nganye); umthwalo wesiseko wetsheyini yokuqhuba = amandla emoto × 9550 / (isantya se-sprocket × ukusebenza kakuhle kothumelo).
I-Superimposed Load Factor (K): Le factor ithatha ingqalelo kwimithwalo eyongezelelweyo ngexesha lokusebenza kwangempela. Ifomula yi-F_w = F₀ × K, apho i-K iyinto edibeneyo yomthwalo kwaye kufuneka ikhethwe ngokusekelwe kwiimeko zokusebenza:
I-Starting Shock Factor (K₁): 1.2-1.5 yezixhobo zokuqalisa ezithambileyo kunye ne-1.5-2.5 yezixhobo zokuqalisa ngqo.
I-Overload Factor (K₂): 1.0-1.2 yokusebenza okuzinzileyo okuqhubekayo kunye ne-1.2-1.8 yokugqithisa okungapheliyo (umz., i-crusher).
I-Operating Condition Factor (K₃): 1.0 kwiindawo ezicocekileyo nezomileyo, 1.1-1.3 kwiindawo ezifumileyo nezinothuli, kunye ne-1.3-1.5 kwiindawo ezirhabaxa.
I-Combined Load Factor K = K₁ × K₂ × K₃. Umzekelo, kwibhanti yokuhambisa yemigodi eqala ngqo, K = 2.0 (K₁) × 1.5 (K₂) × 1.2 (K₃) = 3.6.