Dab tsi yog qhov txiaj ntsig tseem ceeb ntawm pulley?
Dab tsi yog qhov txiaj ntsig tseem ceeb ntawm pulley?

Video: Dab tsi yog qhov txiaj ntsig tseem ceeb ntawm pulley?

Video: Dab tsi yog qhov txiaj ntsig tseem ceeb ntawm pulley?
Video: Qhov Ntawm Ko Yog Dab Tsi 2024, Kaum ib hlis
Anonim

Cov cov txiaj ntsig tseem ceeb ntawm rubey yog tias nws tuaj yeem txo qhov nqi ntawm lub zog tsim nyog los nqa cov khoom hnyav thiab rov faib cov kev taw qhia ntawm lub zog tsim nyog los nqa cov khoom hnyav. Ua ke, ob qho no qhov zoo ua pulleys ib qho cuab yeej tseem ceeb rau kev nqa hnyav.

Xav txog qhov no, dab tsi yog qhov zoo tagnrho cov tshuab ua haujlwm zoo ntawm lub pulley?

Cov zoo tagnrho txhua yam kom zoo dua ( IMA ) ntawm aheel thiab qag yog qhov piv ntawm radii. Yog tias qhov kev siv zog siv rau lub vojvoog loj, lub mechanical kom zoo dua yog R/r uas yuav muaj ntau dua ib qho; yog tias qhov kev mob siab rau siv rau qhov chaw me me, cov mechanical kom zoo dua tseem yog R/r, tab sis nws yuav tsawg dua 1. Pulley.

Tsis tas li ntawd, 3 hom pulleys yog dab tsi? Muaj peb lub ntsiab hom pulleys : tsau, txav tau, thiab sib xyaw. Ib tsau pulley cov log andaxle nyob hauv ib qho chaw. Ib qho piv txwv zoo ntawm qhov ruaj khov rubey isa tus chij ncej: Thaum koj rub rau ntawm txoj hlua, cov lus qhia ntawm lub zog tau rov qab los ntawm rubey , thiab koj tsa tus chij.

Yog li ntawd, qhov zoo ntawm kev siv lub tshuab yooj yim yog dab tsi?

Cov tshuab yooj yim ua hauj lwm yooj yim dua los ntawm kev sib npaug, txo, lossis hloov cov kev taw qhia ntawm lub zog thiab kuj los ntawm kev hloov qhov kev ncua deb ntawm lub zog ua dhau los. Cov tshuab yooj yim tsis tuaj yeem hloov pauv cov haujlwm ua tiav, txawm li cas los xij, lawv tuaj yeem txo qhov kev siv dag zog uas yuav tsum tau ua haujlwm.

Dab tsi yog qhov zoo ntawm kev siv tshuab ntawm ib lub rubey?

A tib tsau rubey , zoo li ib qho hauv Daim Duab 1 (a), muaj qhov zoo tagnrho mechanical kom zoo dua ntawm 1 txij thaum lub zog siv zog (120 N) yog sib npaug rau lub zog load (120 N). tib movable rubey (Daim duab 1(b)), ib nrab ntawm cov load yog txhawb nqa los ntawm txoj hlua txuas rau lub qab nthab.

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