Cov khoom siv thiab qhov tseem ceeb ntawm cov txhuam hniav

Cov khoom siv thiab qhov tseem ceeb ntawm cov txhuam hniav

Carbon txhuamlos yog hluav taws xob txhuam dav siv hauv cov khoom siv hluav taws xob. Lawv siv los xa cov teeb liab lossis lub zog nruab nrab ntawm qhov chaw ruaj khov thiab cov rotating ib feem ntawm qee cov motors lossis cov tshuab hluav taws xob. Cov duab yog duab plaub, thiab cov xov hlau hlau raug ntsia rau hauv caij nplooj ntoos hlav. Carbon txhuam yog ib hom zawv zawg sib cuag, yog li nws yooj yim rau hnav thiab yuav tsum tau hloov tsis tu ncua thiab cov pa roj carbon deposits uas tau hnav lawm yuav tsum tau ntxuav.

Cov khoom tseem ceeb ntawm cov txhuam hniav yog carbon. Thaum ua haujlwm, nws yog nias los ntawm lub caij nplooj ntoos hlav los ua haujlwm ntawm qhov tig zoo li txhuam hniav, yog li nws hu ua carbon txhuam. Cov khoom tseem ceeb yog graphite.

Graphite yog lub ntuj tsim, nws lub ntsiab tivthaiv yog carbon, xim yog dub, opaque, semi-metallic luster, tsawg hardness, tuaj yeem khaws nrog rau tes, graphite thiab pob zeb diamond yog ob qho tib si carbon, tab sis lawv cov khoom sib txawv heev, uas yog vim qhov sib txawv kev npaj ntawm carbon atoms. Txawm hais tias muaj pes tsawg leeg ntawm graphite yog carbon, nws yog cov khoom siv kub resistant nrog lub melting point ntawm 3652 ° C. Siv no cov cuab yeej kub kub tsis kam, graphite tuaj yeem ua tiav rau hauv ib kub resistant tshuaj crucible.

Cov hluav taws xob conductivity ntawm graphite yog zoo heev, tshaj ntau cov hlau thiab ntau pua zaus uas tsis yog hlau, yog li ntawd nws yog tsim rau hauv cov khoom siv hluav taws xob xws li electrodes thiab carbon txhuam; Cov qauv sab hauv ntawm graphite txiav txim siab nws cov lubrication zoo, thiab peb feem ntau siv nws ntawm lub qhov rooj rusty Muab xaum plua plav lossis graphite rau hauv lub xauv yuav ua nws yooj yim dua qhib qhov rooj. Qhov no yuav tsum yog lub lubricating nyhuv ntawm graphite.

Carbon txhuamfeem ntau yog siv hauv DC cov khoom siv hluav taws xob. Brushed motors yog tsim los ntawm stator thiab rotor. Hauv DC lub cev muaj zog, txhawm rau ua kom lub rotor tig, cov kev taw qhia ntawm qhov tam sim no yuav tsum tau hloov tas li, txwv tsis pub lub rotor tsuas yog tig ib nrab ib lub voj voog. Carbon txhuam ua lub luag haujlwm tseem ceeb hauv DC motors. Carbon txhuam ua tam sim no nruab nrab ntawm qhov txav ntawm lub cev muaj zog. Qhov kev coj ua no yog zawv zawg conduction uas muaj peev xwm hloov tam sim no los ntawm qhov kawg ruaj mus rau qhov rotating ib feem ntawm lub tshuab hluav taws xob lossis lub cev muaj zog. Cov pa roj carbon monoxide yog tsim los ntawm ntau cov pa roj carbon txhuam, yog li no txoj kev conduction kuj ua rau cov pa roj carbon txhuam yooj yim hnav, thiab cov carbon txhuam kuj hloov cov kev taw qhia ntawm tam sim no, uas yog, lub luag hauj lwm ntawm kev sib hloov.

Lub tshuab txhuam txhuam adopts mechanical commutation, sab nraud magnetic ncej tsis txav thiab lub puab coil txav. Thaum lub cev muaj zog ua haujlwm, lub commutator thiab coil tig ua ke, thiab cov carbon txhuam thiab cov hlau nplaum hlau tsis txav, yog li cov commutator thiab cov carbon txhuam tsim kev sib txhuam los ua kom tiav qhov kev hloov ntawm tam sim no kev taw qhia.

Raws li lub cev muaj zog rotates, txawv coils los yog ob theem sib txawv ntawm tib lub kauj yog energized, thiaj li hais tias ob tug ncej ntawm lub magnetic teb generated los ntawm lub kauj muaj ib lub kaum sab xis nrog ob tug ncej kaw mus rau cov hlau nplaum ruaj khov stator, thiab lub zog yog generated los ntawm lub repulsion ntawm tib ncej thiab attraction ntawm opposite ncej tsav lub lub cev muaj zog tig.

Carbon txhuamkuj tseem siv tau hauv AC khoom siv. Cov duab thiab cov khoom siv ntawm AC lub cev muaj zog carbon txhuam thiab DC lub cev muaj zog carbon txhuam yog tib yam. Hauv AC motors, cov txhuam hniav yog siv thaum qee qhov winding rotors xav tau kev hloov pauv ceev, xws li peb cov kev xyaum siv hluav taws xob thiab polishing tshuab, thiab lawv yuav tsum tau hloov cov txhuam hniav ntau zaus.