Vim Li Cas Chain Drives Xav Tau 17 Hniav: Chordal Action Piav Qhia

Sprockets hauv Tshuag thiab kev cai cov hniav suav

Lub hom phiaj lo lus tseem ceeb:chain tsav chordal nkaus

Secondary:yam tsawg kawg nkaus sprocket hniav, sprocket hniav suav xaiv, polygonal nyhuv saw

Meta piav qhia:Kev txiav txim chordal ua rau 6% kev hloov pauv ceev ntawm 9-tus hniav sprocket thiab 1.7% ntawm 17 hniav. Cov lej tom qab txoj cai 17-hnub, ntxiv rau ntau tus hniav suav thiab vim li cas nws tshwm sim.

Chain tsis qhwv ib ncig ntawm lub sprocket hauv ib lub voj voog. Nws qhwv nyob rau hauv ib tug polygon.

Qhov tseeb geometric ib leeg ua rau kev hloov pauv ceev, kev vibration, suab nrov thiab nrawm hnav, thiab nws yog vim li cas txhua txoj saw tsav tsheb qhia koj kom siv tsawg kawg 17 hniav ntawm tus tsav tsheb. Kev nkag siab txog cov txheej txheem tso cai rau koj txiav txim siab thaum twg los ua txhaum txoj cai.

Qhov kev txiav txim chordal yog dab tsi

Txhua txoj hlua txuas yog ib ntu ncaj ncaj. Thaum cov saw txuas nrog lub sprocket, cov kev sib txuas ua ib lub voj voog nyob rau hauv lub voj voog, tsis yog ib qho arc.

Raws li lub sprocket tig, lub vojvoog zoo ntawm cov saw hlau tawm ntawm cov sprocket hloov tsis tu ncua. Nws yog qhov siab tshaj plaws thaum tus menyuam zaum saum lub sprocket, thiab yam tsawg kawg ib nrab ntawm tus hniav tom qab thaum cov saw txuas ib chord ntawm ob lub yob.

Txij li thaum linear ceev yog angular tshaj tawm lub sij hawm lub vojvoog, qhov sib txawv ntawm lub vojvoog ntawm qhov rpm tas li muab cov saw sib txawv. Txhua tus hniav koom nrog, mus ib txhis.

Standard formulation:

Txawm tias thaum lub sprockets tig ntawm qhov ceev, cov saw ceev tsis khov kho, vim hais tias qhov zoo ntawm sprocket radius hloov los ntawm txhua qhov kev sib koom tes. Kev txiav txim chordal yog tswj hwm los ntawm tus lej ntawm cov hniav:

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Kev hloov pauv ceev=(V max − V min) / V max=1 − cos (180℃/ N)

Expanded, tib kev sib raug zoo nyeem:

v_max=ωR

v_min=ωR · cos(180℃/ N)

Δv / v_avg=1 − cos(180℃/N)

Daim ntawv ceeb toom ntawm cov qauv: qhov sib txawv, δv=(1/cos(π/z) − 1) × 100%, normalises tawm tsam yam tsawg kawg nkaus es tsis yog qhov siab tshaj plaws. Ob tug diverge me ntsis ntawm cov hniav tsawg. Peb siv thawj daim ntawv thoob plaws.

Cov lej

Tshaj tawm cov ntsiab lus los ntawm cov peev txheej saum toj no:

Daim duab 1. Chain ceev variation tiv thaiv sprocket hniav suav.

Kev ntsuas tus qauv thoob plaws qhov ntau muab cov duab ntawm qhov nkhaus.(Cov kab nruab nrab no yog peb tus lej lej ntawm cov qauv luam tawm, tsis tau theej los ntawm cov chaw tsim khoom lag luam - cov ntsiab lus kawg pom zoo nrog cov nqi luam tawm saum toj no.)

Qhov nkhaus ntog steeply thiab ces flattens. Mus los ntawm 9 mus rau 17 cov hniav txiav variation los ntawm qhov zoo ntawm 3.5. Mus los ntawm 17 mus rau 30 cov hniav tau txais koj lwm qhov ntawm 3 - tiag, tab sis nrog kev txo qis rov qab los tiv thaiv tus nqi ntawm qhov loj dua sprocket.

Kaum xya tus hniav yog qhov twg qhov nkhaus tig. Hauv qab no koj them ntau heev; saum toj no koj them ntau zuj zus ntxiv sprocket rau kev nce qib qis dua.

Dab tsi 6% ceev variation ua tau

Ntawm 9-tus hniav sprocket cov saw nrawm nrawm thiab qeeb los ntawm 6% ntawm nws qhov ceev ceev, ob peb zaug ib lub kiv puag ncig. Peb qhov tshwm sim ua raws.

Inertial loading.Accelerating cov saw loj ntxiv nro tshaj qhov kis tau tus mob. Lub zog ntsuas nrog lub xwmfab ntawm kev ceev, yog li kev tsav tsheb nrawm nrog cov hniav qis raug rau txim ob zaug.

Kev vibration thiab suab nrov.Ntawm 9 cov hniav, qhov tshwm sim yog qhov tseem ceeb ntawm kev co. Hauv qab 17 cov hniav qhov kev hloov pauv ntau tshaj li ntawm 3%, uas feem ntau tau piav qhia tias tsis muaj kev vibration thiab suab nrov.

Articulation hnav.Cov hniav tsawg dua txhais tau tias txhua qhov txuas tig los ntawm lub kaum sab xis loj dua thaum nws nkag mus thiab tawm ntawm sprocket. Nrog rau cov hniav tsawg heev, txhua qhov txuas tau dhau los ua ib qho kev sib txuas loj dua ib lub voj voog kev sib koom tes, uas ua rau tus pin- bushing hnav.

Qhov thib peb yog tus neeg tua neeg ntsiag to. Pin-Bushing hnav yog dab tsi elongates saw, thiab saw elongation yog dab tsi thaum kawg nws txoj sia.

Yam tsawg kawg ntawm cov hniav: qhov chaw hais li cas

Qhov zoo tshaj plaws version kawm tiav qhov tsawg kawg nkaus los ntawm kev tsav ceev:

Daim duab 2. Yam tsawg kawg nkaus suav cov lus pom zoo los ntawm chav kawm tsav ceev.

- Slow speed drive (drip type lubrication) -12 zuv

- Nruab nrab ceev tsav (roj da dej hom lubrication) -17 zuv

- Kev kub ceev tsav (tso lubrication) -25 zuv

Qhov no yog lo lus teb rau "Kuv puas tuaj yeem siv tsawg dua 17 cov hniav?" Yog - ntawm qhov ceev ceev. Lub txim inertial los ntawm chordal ua scale nrog ceev, yog li ib tug qeeb tsav zam variation uas yuav ua kom puas ib tug ceev. Ib tug 12-hnub sprocket ntawm ib tug qeeb conveyor yog ib tug tsim nyog engineering xaiv. Tib sprocket ntawm 1,000 rpm tsis yog.

Siv tus lej lej ntawm cov hniav

ISO 606 thiab kev xyaum tsav dav dav ob leeg pom zoo suav cov hniav cuav ntawm tus neeg tsav tsheb.

Cov tsav tsheb feem ntau siv ib tus lej ntawm cov pitches hauv cov saw hlau. Pairing uas nrog tus lej khib ntawm tus neeg tsav tsheb cov hniav kom ntseeg tau tias hnav tsis sib xws ntawm cov saw thiab cov hniav sprocket.

Chain lengths yuav luag txhua zaus (qhov txawv qhov ntev xav tau qhov sib txuas offset, uas tsis muaj zog). Nrog ib tug txawm sawb thiab ib tug txawm sprocket, tib txoj saw txuas txuas ntxiv raws li tib cov hniav sprocket, thiab hnav concentrates. Kev suav cov hniav khib nyiab ua rau lub voj voog rov ua dua yog li hnav faib nyob ib ncig ntawm ob qho tib si.

Nws tsis raug nqi dab tsi. Xaiv 17, 19, 21, 23, 25 es tsis yog 18, 20, 22.

Cov hniav uas tau tsav ntau tshaj plaws suav - thiab vim li cas nws tshwm sim

Lub kaus mom luam tawm txawv me ntsis:

114qhov siab tshaj plaws ntawm txhua qhov tsav sprocket

tsawg dua 120

tsis ntau tshaj 120

Qhov laj thawj yog tib yam hauv tag nrho peb, thiab nws yog hais txog hnav saw, tsis yog saw tshiab:

Rau qhov muab elongation ntawm cov saw vim hnav, txoj kab uas hla ua haujlwm ntawm cov saw ntawm lub sprocket nce ntxiv txheeb ze rau qhov nominal pitch txoj kab uas hla - cov saw yuav ua haujlwm siab dua ntawm cov hniav sprocket. Kev tso cai rau kev nyab xeeb kev hnav feem ntau yog nyob ib ncig ntawm 2% elongation tshaj nominal ntev. "

Raws li chain wears, suab loj hlob. Ib lub suab ntev ntev tsis tuaj yeem zaum hauv cov hnab ris ntawm cov hniav ntawm lub vojvoog qub, yog li cov saw hlau nce siab dua cov hniav. Nyob rau ib tug me me sprocket no yog tolerable. Ntawm ib qho loj heev, qhov kev ua yuam kev nyob ib ncig ntawm lub qhwv yog txaus rau cov saw kom nce tawm tag nrho.

Quantified: 2% elongated saw ntawm 120-tus hniav sprocket twb drifted los ntawm 1.2 pitches txheeb ze rau sprocket ncig.

Ib qho qauv sib koom ua ke sib txawv ntawm cov ntawv luam tawm:

Ib qho qauv yooj yim rau kev txiav txim siab ntau npaum li cas cov saw elongation ib sprocket tuaj yeem ua raws li200/N, qhia raws li feem pua, qhov twg N yog tus naj npawb ntawm cov hniav ntawm qhov loj tshaj plaws sprocket. "

Xyuas nws: 200/114=1.75%, 200/120=1.67%. Ob qho av ze ntawm 2% tso cai hnav daim duab. Lub "cap" tsuas yog qhov twg cov hniav suav tseem zam lub elongation koj npaj yuav tso cai ua ntej hloov.

Qhov no kuj txhais tau tias qhov txwv yog koj li los teev. Yog tias koj hloov cov saw ntawm 1% elongation, 200 / N=1 muab N=200 cov hniav. Yog tias koj khiav mus rau 2%, nyob ntawm 100.

Ob txoj cai ntxiv tsim nyog paub

Cov hniav ntau dua lossis sib npaug rau 50.Kev xyaum zoo yog khaws cov nyiaj ntawm cov hniav ntawm 50 lossis siab dua qhov twg ob qho tib si sprockets khiav ntawm tib cov saw - ntawm 1: 1 tsav, uas txhais tau tias 25 cov hniav txhua. A 1: 1 tsav nrog ob 17-hnub sprockets txaus siab rau qhov tsawg kawg nkaus ntawm txhua tus tab sis suav rau 34, yog li ob qho tib si xaus raug kev txom nyem chordal ib txhij.

Qhov sib piv siab tshaj 7: 1 rau ib theem.Qhov siab tshaj plaws pom zoo piv rau ib qho kev txo qis yog 7: 1; saum toj no, kev txo ob npaug yog nyiam. Nrog kev poob siab loading daim duab zawm mus txog 5: 1.

Center nrug cuam tshuam nrog chordal nkaus.Los ntawm CEMA cov khoom siv saw hlau: "yog tias qhov chaw nruab nrab ntawm qhov sib nrug yog qhov sib txawv ntawm cov saw hlau, chordal kev txiav txim me me. Tab sis yog tias qhov chaw nruab nrab ntawm qhov sib nrug yog ntau yam ntawm cov saw pitch +0.5 suab, chordal kev txiav txim nce. Kev teeb tsa qhov chaw nyob deb mus rau tag nrho cov pitches cia ob lub sprockets 'chordal variation ib nrab tso tseg; ib nrab-pitch offset ua rau lawv ntxiv.

Xaiv ib ntus

Piv txwv- khaws cia nyob rau hauv 7: 1 ib theem (5: 1 nrog poob siab)

Tsav hniav- 17 yam tsawg kawg nkaus rau cov tsav dav dav; 12 txais tau ntawm qhov ceev nrog drip lubrication; 25 rau kev kub ceev nrog pumped lubrication

Tsis suavrau tus tsav tsheb

Tsav cov hniav- kos tawm tsam 200/N rau koj qhov kev hloov elongation

Cov hniav ntau dua lossis sib npaug rau 50

Center nrugntawm tag nrho cov pitches

FAQ

Kuv puas tuaj yeem siv 15-hnub sprocket?

Ntawm qhov ceev ceev, yog - 15 tau txais dav thiab 13 tuaj yeem ua haujlwm hauv cov qauv tsim. Ceev variation ntawm 15 hniav yog 2.19%, piv rau 1.70% ntawm 17. Txiav txim nws tawm tsam koj txoj kev ceev thiab lubrication.

Puas yog qhov kev txiav txim chordal cuam tshuam rau lub sprocket loj thiab?

Yog lawm, tab sis deb tsawg dua - variation ntog nrog cov hniav suav, yog li 60-tus hniav sprocket yuav luag tsis muaj dab tsi. Lub me sprocket dominates.

Yog vim li cas tus tsav sprocket capped txhua?

Hnav chains caij siab dua ntawm cov hniav. Yav dhau los ib tus hniav suav cov kev sib sau ua ke cia cov saw hlau nce mus. Siv 200 / N los teeb tsa koj tus kheej txwv raws li koj txoj cai hloov pauv.

Puas yog cov hniav txhuam hniav puas muaj chordal kev txiav txim?

Yog, tab sis ntau me me. Cov ntaub ntawv luam tawm muab tso rau nws feem ntau nyob rau hauv 0.6%, tab sis ua ke nrog pulley deflection thiab pitch yuam kev nws tuaj yeem ncav cuag 2-3%.

Puas yog lub sprocket loj dua ib txwm muab cov saw hlau ntev dua?

Mus txog qhov txwv elongation, feem ntau yog - qis chordal nkaus, qis articulation kaum sab xis, txo cov hniav loading. Kev lag luam yog tus nqi, qhov hnyav thiab qhov chaw.

Tianjin OuNaiDa Transmissions Technology tsim cov sprockets rau ANSI thiab ISO cov qauv hauv Tshuag thiab suav cov hniav kev cai, nrog cov hniav tawv uas daim ntawv thov xav tau. Xa peb koj qhov piv txwv, qhov nrawm thiab qhov chaw nyob deb thiab peb yuav ua haujlwm suav nrog koj.