1,MC pulley kukundikana fomu uye chikonzero chekuongorora　

　　MC naironi zvinhu zvinova polyamide kemikari uye ine covalent uye molecular bond, kureva intra-molecular yakasungwa necovalent bond uye inter-molecular inosungwa nemamolecular bond.Ichi chimiro chechinhu chine zvakanakira zvakasiyana-siyana sehuremu huremu, kusamira kwekusagadzikana, kusagadzikana kwekuora, kuvhara, nezvimwewo. Ipurasitiki yeinjiniya yakashandiswa zvakanyanya [1].　

　　Iyo MC nylon pulley inoshandiswa pamusuwo wenhovo yeTianjin Metro Line 2 ichava nemhando mbiri dzinotevera dzekukundikana mushure menguva yenguva: (1) kupfeka pamucheto wekunze wepulley;(2) kubvumirwa pakati pemhete yemukati yepulley uye kutakura.

Zvikonzero zvemhando mbiri dziri pamusoro pekukundikana, kuongorora kunotevera kunoitwa.　

　　(1) Muviri wegonhi hauna kunaka, uye nzvimbo yepulley ichave isina kururama panguva yekushanda, izvo zvichaita kuti mupendero wekunze upfeke, uye simba remukati wepulley uye kutakura kuchaonekwa nenzira dzakasiyana-siyana. kushushikana kwenzvimbo.　

　　(2) track haina kutwasuka kana track yepasi haina kufuratira, zvichikonzera kusakara kunze.　

　　(3) Kana gonhi richizaruka nekuvharwa, gonhi rinotsvedza rinofamba, vhiri rinotsvedza rinoiswa pasi pekuremerwa cyclic kwenguva yakareba, zvichikonzera kuneta deformation, vhiri remukati repulley rakaremara uye gaka rinogadzirwa.　

　　(4) gonhi pakuzorora, pulley yanga iine huremu hwegonhi rinotsvedza, nguva yakareba kutakura mutoro wakamisikidzwa, zvichikonzera kukanganisa deformation.　

　　(5) Pane mutsauko wekuoma pakati pekubereka uye pulley, uye nguva yakareba extrusion chiito chichabudisa deformation uye kukonzera kukundikana [2].　

　　2 MC pulley hupenyu hwekuverenga maitiro　

　　MC nylon pulley chimiro chepolymer chezvishandiso zveinjiniya, mukushanda chaiko, netembiricha pamwe nebasa remutoro, chimiro chemolecular yekuchinja kusingadzoreki, izvo zvinozotungamira mukuparara kwezvinhu [3].　

　　(1) Inotariswa maererano netembiricha: nekuchinja kwekushisa mukati menharaunda, hukama hunotevera huripo pakati pezvinhu zvemuviri zvemidziyo uye nguva yekutadza, inoratidzwa sebasa re　

　　F (P) = Kτ (1)　

　　apo P ndiyo yenyama uye yemuchina kukosha kwepfuma;K ndiyo maitiro ekuita nguva dzose;τ inguva yekukwegura.　

　　Kana iyo nyaya yakatemwa, ipapo kukosha kweP kwechimiro chechimiro chechinhu ichi kunotarwa, uye hunhu hwakavimbiswa hwekusimba nekukotama hwakaiswa pamusoro pe80%, ipapo hukama pakati penguva yakaoma uye K kugara.　

　　τ=F(P)/K (2)　

　　Iyo K inogara uye tembiricha T inogutsa hukama hunotevera.　

　　K=Ae(- E/RT) (3)　

　　apo E ndiyo activation simba;R ndiyo yakanakira gasi nguva dzose;A uye e zvinhu zvinoramba zviripo.Kutora logarithm yeaya ari pamusoro mafomula masvomhu uye kugadzirisa deformation, tinowana　

　　lnτ = E/(2.303RT) C (4)　

　　Mune equation yakawanikwa pamusoro, C inogara iripo.Maererano neiyo equation iri pamusoro, inozivikanwa kuti kune hukama hwakanaka hwakafanana pakati penguva yakaoma uye tembiricha .Kuenderera mberi nekugadzirisa kweiyo equation iri pamusoro, tinowana.　

　　lnτ=ab/T (5)　

　　Zvinoenderana nedzidziso yekuongororwa kwenhamba, maconstants a uye b muequation iri pamusoro anotemerwa, uye hupenyu hwakakosha pakupisa kwesevhisi hunogona kuverengerwa.　

　　Tianjin metro line 2 inzvimbo yepasi pevhu, nekuda kwebasa remusuwo wenhovo uye kutonga kwemhete, tembiricha pane iyo pulley inodzikama gore rose, inoyerwa nekutora avhareji kukosha kwe25.°, mushure mekutarisa tafura, tinogona kuwana = -2.117, b = 2220, kuunza t = 25° mu (5), tinogona kuwanaτ = 25.4 makore.Tora chengetedzo ye0.6, uye uwane kukosha kwekuchengetedza kwe20.3 makore.　

　　(2) mutoro pakuongorora kwehupenyu hwekuneta: fungidziro iri pamusoro yekutarisa tembiricha yehuwandu hwehupenyu hwepulley, uye mukushandiswa chaiko, iyo pulley ichavewo pasi pebasa remutoro, musimboti wayo ndewe: polymer molecular chimiro pasi chiitiko chekuchinjanisa mutoro chakaburitsa isingadzokerike shanduko uye deformation yechimiro chemolecular, vashandi vemakanika pane basa remamorekuru cheni, vakagadzira kutenderera uye kukanganisa, kuumbwa kwesirivheri pateni uye shear band sirivheri pateni, kufananidzira kuneta, nekuunganidzwa kwehombe. nhamba yealternating cycle loading, iyo sirivha pateni yakawedzera zvishoma nezvishoma, ichiita mutswe, uye yakawedzera zvakanyanya, uye pakupedzisira yakatungamirira kukutsemuka kwekukuvara kwezvinhu.　

　　Mukuverenga kwehupenyu uku, kuongororwa kwehupenyu kunoitwa pasi pemamiriro enzvimbo yakanaka, kureva kuti track yacho yakati sandara uye chinzvimbo chemuviri wegonhi zvakare chakati sandara.　

　　Kutanga funga nezvekukanganisa kwekuremerwa kwemutoro pahupenyu: gonhi rimwe nerimwe rinotsvedza rine mapulley mana, pulley yega yega inogovera chikamu chechina chehuremu hwegonhi, mushure mekutarisa ruzivo rwekuti inotsvedza gonhi uremu 80kg, giravhiti yemusuwo inogona kuwanikwa: 80× 9.8 = 784 N.　

　　Wobva wagovera giravhiti pane imwe neimwe pulley se: 784÷ 4 = 196 N.　

　　Upamhi hwegonhi rekutsvedza i1m, ndiko kuti, nguva imwe neimwe musuwo unovhurwa uye wakavharwa 1m, uyezve kuyera dhayamita yepulley ndeye 0.057m, inogona kuverengerwa seyepakati yayo: 0.057× 3.14 = 0.179m.　

　　Ipapo gonhi rinotsvedza rinovhurwa kamwe chete, nhamba yekutendeuka iyo pulley inoda kuenda inogona kutorwa: 1÷ 0.179 = 5.6 kutendeuka.　

　　Zvinoenderana nedata rakapihwa neDhipatimendi reTraffic Management, nhamba yekumhanya kune rimwe divi remwedzi ndeye 4032, iyo inogona kutorwa kubva kuhuwandu hwekumhanya pazuva: 4032÷ 30 = 134.　

　　mangwanani ega ega chiteshi chinoyedza gonhi rekuvhara kanenge ka10, saka huwandu hwese hwekufamba kwemusuwo wekutsvedza pazuva ndewe: 134 10 = 144 nguva.　

　　Sliding door switch kamwe, pulley kuenda 11.2 turns, zuva rekutsvedza gonhi rine 144 switch cycle, saka nhamba yese yepulley inopfava pazuva: 144× 5.6 = 806.4 kutendeuka.　

　　Imwe neimwe nhanho yepulley, isu tinofanirwa kuve pasi pekutenderera kwesimba, kuitira kuti tigone kuwana simba rayo frequency: 806.4÷ (24× 3600) = 0.0093 Hz.　

　　Mushure mekutarisa iyo data, 0.0093 Hz iyi frequency inoenderana nenhamba yekutenderera iri pedyo nekusingaperi, zvichiratidza kuti kuwanda kwemutoro kwakaderera kwazvo, pano hazvidi kufunga.　

　　(3) funga zvakare kukanganisa kwekumanikidza kwehupenyu: mushure mekuongorora, kusangana pakati pepulley uye track yekusangana kwepamusoro, inofungidzirwa nzvimbo yayo: 0.001.1× 0.001.1 = 1.21× 10-6m2　

　　Zvinoenderana nekumanikidza metric: P = F / S = 196÷ 1.21× 10-6 = 161× 106 = 161MPa　

　　Mushure mekutarisa tafura, nhamba yematenderedzwa inoenderana ne161MPa ndeye 0.24×106;maererano nenhamba yekutenderera kwemwedzi 4032 nguva, huwandu hwematenderera pagore hunogona kuwanikwa: 4032×12 = 48384 nguva　

　　Ipapo tinogona kuwana kudzvanywa uku kunoenderana nehupenyu hwepulley: 0.24× 106÷ 48384 = makore 4.9