Lub shearer txiav tsis kam qauv sau los ntawm cov kws txawj qub Soviet Union tau qhia rau hauvmineral sizers. Kev sib raug zoo ntawm kev txiav quab yuam thiab kev txhawb nqa ntawm cov khoom siv nyob rau hauv cov xwm txheej ntawm kev txhawb nqa ruaj khov tau txais. Ib qho kev nthuav dav dav dav nrog cov khoom sib cais ntawm cov khoom sib cais tau muab los ntawm: Tom qab ntawd, cov yam ntxwv tsis sib xws ntawm cov khoom siv raws li qhov muaj peev xwm tsim tau raug tham, thiab cov qauv rov ua dua ntawm cov neeg caij tsheb - hnyav txaus siab D3 kev faib tawm thiab kev qhia ntawm cov khoom siv hluav taws xob nruab nrab tau muab. Qhov thib ob, qhov tshwm sim coefficient ntawm lub sij hawm mem tes load ntawm cov khoom particle yog soj ntsuam, thiab cov theem ua ntej ntawm cov khoom zoo particle nyob rau hauv cov kev mob ntawm ruaj khov thiab ob npaug hneev tuab txiav yog tham, thiab nws txoj kev sib raug zoo nrog lub peev xwm ntau lawm thiab lub zog noj yog tham. Thaum kawg, lub matrix qhia ntawm mem tes load nrog random discrete zog ntawm cov khoom granular yog muab. Nws muaj qhov tseem ceeb theoretical tseem ceeb thiab cov txiaj ntsig siv tau rau kev tshawb fawb thiab kev loj hlob ntawm cov khoom zoo particle crusher.
Cov qauv kev siv tshuab ntawm txhua qhov kev siv tshuab yog lub hauv paus ntawm kev txheeb xyuas cov yam ntxwv dynamic, kinematic thiab zoo li qub ntawm cov tshuab tshuab. Mineral sizers yog tawg los ntawm random thiab discrete cov ntaub ntawv. Qhov no ua rau nws muaj kev sib tw los tsim cov ntxhia sizers cov qauv siv tshuab. Nws yog vim li no tias nws tuaj yeem pom zoo dua qhov kev sib tsoo ntawm lub crusher. Cov kws tshawb fawb txawv teb chaws siv cov txheej txheem sib cais thiab cov txheej txheem kev tshuaj ntsuam xyuas software los simulate qhov loj ntawm lub zog crushing. Cov txheej txheem yog raws li hauv qab no: Los ntawm kev sim ntsuas lub cev lub cev ntawm cov khoom raws li qhov simulation tsis tau thiab tom qab ntawd teeb cov khoom los hloov cov txheej txheem sib tsoo, cov qauv no tsis tuaj yeem ntsuas tangential txhav thiab ib txwm nruj ntawm cov khoom, tsuas yog los ntawm kev simulation kev sim tau ntawm cov txheej txheem ntawm compressive zog thiab qhov tseeb kwv yees tau txais, cov txiaj ntsig ntawm kev sim thiab cov khoom sib txawv ntawm cov khoom simulation tsis muaj qhov sib txawv ntawm cov txheej txheem no. muaj qhov tsis txaus ntseeg. Yog li ntawd, txiav txim siab qhov sib txawv thiab tsis pom kev ntawm cov ntxhia sizers, nws yog qhov tseem ceeb theoretical thiab cov txiaj ntsig zoo los kawm txog kinetic, kinematic thiab zoo li qub ntawm cov ntxhia Sizers thiab tsim cov khoom tshiab.
Mineral sizers Cov khoom tawg tau muaj cov khoom tsis sib xws. Piv txwv tias cov khoom siv granular yog cov khoom siv kheej kheej nrog ib qho me me, thaum lub vojvoog (k) ntawm cov khoom kheej kheej tau txiav txim siab, nws txoj hauj lwm hauv lub crushing chamber yog txiav txim siab, raws li pom nyob rau hauv daim duab 1. Ntev npaum li tej yam kev mob tau ntsib, cov iav txiav pib txiav los ntawm point A, mus txog qhov siab tshaj plaws txiav qhov tob ntawm point B, thiab ua tiav cov kev txiav txim siab ntawm qhov kev txiav txim siab ntawm qhov point C. Piv txwv li, thaum cov iav txiav mus txog qhov point B, qhov kev txhawb nqa yog qhov kev txhawb nqa quab yuam N, N, Nm ua ib qho kev txhawb nqa daim duab peb sab, thiab sib npaug nrog cov txiav txiav P. Thaum txiav cov hniav txiav mus rau taw tes B, qhov siab tshaj plaws txiav qhov tob, qhov siab tshaj plaws tangential txiav kuj siv tau rau hauv lub qub Soviet Union tus kws tshawb fawb summarized thee winning machine {K h} 2 Kps, Pa (0.25 + 0.018 + 0.1) F]; K=0, 1,... kN:p - kev sib cuag lub zog ntawm kev txiav pob zeb, MPa, pob zeb firmness coefficient f thiab kev sib cuag lub zog p, cov kev sib raug zoo yog qhia nyob rau hauv Table 1. Thaum lub hardness coefficient (piv txwv li, Platinell hardness coefficient) tshaj tus nqi nyob rau hauv Table 1, kev sib cuag lub zog yuav muab xam raws li 15 × P K, cuam tshuam coefficient ntawm kev txiav hom, K=1.5; K2 yog tus cuam tshuam coefficient ntawm cutter geometry, K=1232; K, yog tus coefficient ntawm lub taub hau loj, K=l.25; Ib kab sib nrug, mm; h txiav qhov tob, mm; F Hniav qhov chaw, feem ntau F=(15 ~ 20)mm2. Lateral quab yuam ntawm ib tug hniav txiav cov khoom: P=KPeg=[c,(c2th)tc3]+(hh)}Pe; K=0, 1,... Nyob rau hauv cov mis 8(2): c1 thiab c2c hniav kev npaj cuam tshuam coefficient, nyob rau hauv kev txiav txim, c =1.4,c2=0.3,c 0.15. Thaum cov khoom yuav tawg Prinell hardness coefficient, txiav qhov tob h, txiav kab sib nrug. Thaum nws tau txiav txim siab, nws qhov kev txiav tsis kam thauj khoom yog cov txheej txheem txiav txim siab tas mus li, uas yog, nws cov khoom thauj dav dav: P=PP.PM=0,1,.8 qhov twg: P ib kab rov tav: P ib ntsug tivthaiv; Kuv, ib tug torque; Peb, ib lub zog. Dab tsi yuav tsum tau hais txog ntawm no yog tias yav dhau los Soviet Union cov kws tshawb fawb tau sau cov qauv ntawm cov khoom siv los ntawm ntau qhov kev xeem, thiab tom qab siv sijhawm ntev, nws tau raug pov thawj tias cov txiaj ntsig kev suav tuaj yeem pom zoo nrog cov txiaj ntsig kev xeem tiag tiag. Tsis tas li ntawd, qhov tseem ceeb tshaj plaws ntawm cov qauv no yog Platinell hardness coefficient "tsuas yog yuav tsum tau sim lub zog compressive ntawm cov khoom kom raug crushed. Piv nrog rau qhov ntsuas Bond ua hauj lwm Performance index, nws yog yooj yim thiab txhim khu kev qha. Tib lub sij hawm, nws zam qhov cuam tshuam ntawm tus nqi Performance index hauv Holmes formula . 2.2 Random Discrete Probability 1 Characteristic. Crusher muaj peev xwm txiav tsis kam thiab lub sijhawm mem tes load ntawm cov ntxhia sizers yog ob qho tib si - hniav. Yog li ntawd, nws yog ib qho tsim nyog yuav tsum tau muab cov pob zeb me me rau kev ua haujlwm crushing rau ib tus hniav. Qx10Q,=3600×0xZ(4), qhov twg :Q, crushing ntau lawm hauj lwm ntawm ib tug hniav yog particle bulk ntom, (cms): lub peev xwm ntau lawm ntawm crusher Q, (h): tus naj npawb ntawm crushing hniav ntawm ib tug crusher Z; p -- Qhov ntom ntawm cov khoom yuav raug crushed, (gcm). Txhawm rau pab txhawb kev sib tham, cov kev tshuaj xyuas hauv qab no ntawm qhov tsis sib xws ntawm cov mem tes load yuav siv 2PGC-307 tus qauv crushing xeem ua piv txwv, uas tsis tsuas yog muab cov lus xaus zoo, tab sis kuj muab cov txiaj ntsig ntau, uas tuaj yeem tsis tsuas yog ntsuas qhov tseeb ntawm kev tshawb xav, tab sis kuj ua qhov kev ntsuam xyuas yuam kev. Tag nrho cov qauv tsis thiab cov yam ntxwv ntawm cov khoom parameters, cov kev siv tshwj xeeb ntawm cov tsis muaj thiab cov txiaj ntsig suav tau muab rau hauv kev siv.