Mhedzisiro yePolygon yeRoller Chains uye Maitiro Ayo

Mhedzisiro yePolygon yeRoller Chains uye Maitiro Ayo

Mundima yekutumira michina,cheni dzinotendereraZvinoshandiswa zvakanyanya mumichina yekugadzira zvinhu mumaindasitiri, michina yekurima, kugadzira mota, logistics, nezvimwe zvinoshandiswa nekuda kwechimiro chazvo chiri nyore, kugona kwadzo kutakura zvinhu zvakawanda, uye kushanda kwadzo pamutengo wakaderera. Zvisinei, panguva yekushanda kweroller chain, chiitiko chinozivikanwa se "polygon effect" chinokanganisa zvakananga kupfava kwekutumira zvinhu, kururama, uye hupenyu hwebasa, zvichiita kuti ive hunhu hunokosha hunofanira kunzwisiswa nemainjiniya, vashandi vekutenga, uye vanochengetedza michina.

Kutanga, Kuburitsa Mhedzisiro yePolygon: Chii chinonzi Mhedzisiro yePolygon yeRoller Chains?

Kuti tinzwisise mhedzisiro yepolygon, tinofanira kutanga taongorora chimiro chepakutanga chekutumira cheni yeroller. Kutumirwa kweroller chain kunonyanya kuve ne sprocket inotyaira, sprocket inotyaira, uye roller chain. Sezvo sprocket inotyaira ichitenderera, meshing yemazino e sprocket ne roller chain links inotumira simba ku sprocket inotyaira, izvo zvinozotungamira mashandiro anotevera. Iyo inonzi "polygon effect," inozivikanwawo se "polygon effect error," inoreva chiitiko mu roller chain transmission apo mutsetse wekutenderera wecheni wakatenderedza sprocket unoumba chimiro chakafanana nepolygon, zvichiita kuti kumhanya kwecheni nekukurumidza uye kumhanya kweinstantaneous kwe sprocket inotyaira kuratidze kuchinja-chinja nguva nenguva. Zvichitaurwa zviri nyore, sezvo sprocket inotenderera, cheni haifambi mberi nekufamba kwemutsara nguva dzose, asi panzvimbo pezvo, sekunge ichifamba pamucheto we polygon, kumhanya kwayo kunochinja-chinja nguva dzose. Saizvozvo, sprocket inotyaira inotendererawo nekufamba kweinstantaneous angular, asi panzvimbo pezvo inosangana nekuchinja-chinja nguva nenguva mukumhanya. Kuchinja-chinja uku hakusi kutadza kushanda zvakanaka asi hunhu hwechimiro che roller chain transmission, asi kukanganisa kwayo hakugoni kufuratirwa.

Chechipiri, Kutsvaga Kwakatangira: Nheyo yePolygon Effect

Mhedzisiro yepolygon inobva pahunhu hwemagadzirirwo emaketani anotenderera nemasprocket. Tinogona kunzwisisa zvakajeka maitiro ekugadzira kwayo kuburikidza nematanho anotevera akakosha:

(I) Kugadziriswa kweMeshing kweChain neSprocket

Kana cheni yeroller yakaputirwa pa sprocket, sezvo sprocket iri chinhu chakatenderera chakagadzirwa nemazino akawanda, apo chinobatanidza chega chega che chain meshes ne sprocket tooth, pakati pe cheni yacho panoita curve yakavharwa ine mitsetse yakati wandei yakatyoka. Curve iyi yakafanana ne polygon yakajairika (saka zita rekuti "polygon effect"). Huwandu hwemativi e "polygon" iyi hwakaenzana nehuwandu hwemazino ari pa sprocket, uye kureba kwerutivi rwe "polygon" kwakaenzana ne chain pitch (daro riri pakati penzvimbo dzema rollers maviri ari pedyo).

(II) Kufambisa Kwemota Yekutyaira

Kana chidhiraivha chinotenderera nekufamba kwe ω₁, kumhanya kwese kwezino rega rega pa sprocket hakuchinji (v₁ = ω₁ × r₁, uko r₁ iri pitch radius ye driving sprocket). Zvisinei, nekuti meshing point pakati pechain ne sprocket inogara ichichinja pamwe chete ne sprocket tooth profile, daro kubva panzvimbo ine meshing kusvika pakati pe sprocket (kureva, instant turning radius) rinochinja nguva nenguva sezvo sprocket ichitenderera. Kunyanya, kana chain rollers ichipinda zvakanaka pasi pe groove pakati pemazino e sprocket, daro kubva panzvimbo ine meshing kusvika pakati pe sprocket ndere diki (inenge iri sprocket tooth root radius); kana chain rollers ikabatana ne sprocket tooth tips, daro kubva panzvimbo ine meshing kusvika pakati pe sprocket rakanyanya (inenge sprocket tooth tip radius). Kuchinja uku kwe periodically mu instant turning radius kunokonzera kuchinja kwe instantly linear velocity ye chain.

(III) Kuchinja-chinja kweAngular Velocity yeDriven Sprocket

Nekuti cheni iyi ichinhu chakaganhurirwa (chinoonekwa sechisingakwanise kuwedzerwa panguva yekutumira), kumhanya kwemutsara kwecheni kunotumirwa zvakananga ku sprocket inofambiswa. Kumhanya kwekona kwepakarepo ω₂ kwe sprocket inofambiswa, kumhanya kwemutsara kwepakarepo v₂ kwecheni, uye radius yekutenderera kwepakarepo r₂' ye sprocket inofambiswa zvinogutsa hukama hwe ω₂ = v₂ / r₂'.

Nekuti kumhanya kwemutsetse wepakarepo v₂ kwecheni kunochinja-chinja, radius yekutenderera instantly r₂' panzvimbo yemeshing pa sprocket inofambiswa inochinjawo nguva nenguva nekutenderera kwe sprocket inofambiswa (nheyo yacho yakafanana neye sprocket inofambiswa). Zvinhu zviviri izvi zvinoshanda pamwe chete kuti zviite kuti kumhanya kwekona kwepakarepo ω₂ kwe sprocket inofambiswa kuratidze kuchinja-chinja kwakaoma, izvo zvinokanganisa kugadzikana kwe output system yese ye transmission.

Chechitatu, Kuratidzwa Kwemifananidzo: Zviratidzo Zvakananga zveMhedzisiro yePolygon

Mhedzisiro yepolygon inozviratidza nenzira dzakawanda mumasisitimu ekutumira maroller chain. Haingokanganisi chete kururama kwekutumira asi inokonzerawo kudedera, ruzha, nezvimwe zvinetso. Kushanda kwenguva refu kunogonawo kukurumidzisa kupfeka kwezvikamu uye kuderedza hupenyu hwemuchina. Zviratidzo chaizvo zvinosanganisira zvinotevera:

(1) Kuchinja-chinja kweKumhanya kweKutumira Nguva Nenguva

Uku ndiko kuratidzwa kwakananga uye kwepakati kwemhedzisiro yepolygon. Velocity yechain instantaneous linear uye drived sprocket's instantaneous angular velocity zvinoratidza kushanduka-shanduka kwepanguva apo sprocket inotenderera. Kuwanda kwekushanduka-shanduka uku kwakabatana zvakanyanya nekumhanya kwekutenderera kwesprocket uye huwandu hwemazino: kumhanya kwesprocket kwakakwira uye mazino mashoma, ndiko kuwedzera kwekushanduka-shanduka kwespeed. Uyezve, amplitude yekushanduka-shanduka kwespeed inewo hukama nechain pitch uye huwandu hwemazino esprocket: kana chain pitch yakakura uye mazino esprocket mashoma, amplitude yekushanduka-shanduka kwespeed yakakura.

Semuenzaniso, mu roller chain drive system ine mazino mashoma (semuenzaniso, z = 10) uye pitch hombe (semuenzaniso, p = 25.4mm), kana sprocket yekutyaira ichitenderera nekumhanya kwakanyanya (semuenzaniso, n = 1500 r/min), kumhanya kwemutsara kwecheni kunogona kuchinja-chinja zvichienderana nenzvimbo yakakura, zvichikonzera "kusvetuka" kunoonekwa mumashini ekushanda anofambiswa (semuenzaniso, bhandi rekufambisa, spindle yemudziyo wemuchina, nezvimwewo), zvichikanganisa zvakanyanya kururamisa kwekutumira uye kunaka kwebasa. (2) Kukanganisa uye Kudedera

Nekuda kwekuchinja kamwe kamwe kwekumhanya kwecheni (kubva kune rimwe divi rezigzag kuenda kune rimwe), mitoro yeimpact inogadzirwa panguva yekuiswa kwemeshi pakati pecheni nesprocket. Iyi impact load inotumirwa kuburikidza necheni kuenda kuzvikamu zvakaita sesprocket, shaft, uye mabheringi, zvichikonzera kudedera musystem yese yekutumira.

Kuwanda kwekuzunguzika kwakabatanawo nekumhanya kwekutenderera kwesprocket uye huwandu hwemazino. Kana kutenderera kwacho kuchisvika kana kuchiwirirana nekufamba kwenguva kwechishandiso, ruzha runogona kuitika, zvichiwedzera simba rekuzunguzika. Izvi hazvingokanganisi mashandiro akajairika emuchina chete asi zvinogonawo kukonzera kusunungura nekukuvadza zvikamu, uye kutokonzera tsaona dzekuchengetedza.

(3) Kusvibiswa kweRuzha

Kukanganiswa uye kudedera ndizvo zvinonyanya kukonzera ruzha. Munguva yekufambiswa kweroller chain, kukanganiswa kwemeshing pakati pecheni nesprocket, kuroverana pakati pemapitch echeni, uye ruzha rwunobva muchimiro rwunobva mukudedera kunoendeswa kufuremu yemidziyo zvese zvinobatsira mukuita ruzha rwemasystem eroller chain transmission.

Kana mhedzisiro yepolygon ikanyanya kuoneka (semuenzaniso, kukwirira kukuru, mazino mashoma, kumhanya kwakanyanya kwekutenderera), kukanganiswa kwakanyanya uye kudedera kunowedzera, uye ruzha rwunogadzirwa zvakanyanya. Kugara kwenguva refu uchisangana neruzha rwakanyanya hakungokanganisi kunzwa kwevashandi chete asiwo kunokanganisa kudzora kugadzirwa kwenzvimbo uye kutaurirana, zvichideredza kushanda zvakanaka kwebasa.

(IV) Kuwedzera Kwekupfeka Kwezvikamu

Kurema kwemhepo inotenderera uye kudedera zvinokurumidzisa kupera kwezvinhu zvakaita semacheni anotenderera, ma sprockets, shafts, uye ma bearings.

Kupfeka Cheni: Kushanda kwecheni kunowedzera kushushikana pakati pema "chain rollers", "bushings", uye "pins", zvichikurumidzisa kupera kwecheni uye zvishoma nezvishoma kuwedzera "chain stretching" (inozivikanwa se "chain stretching"), zvichiwedzera kuwedzera kwe "polygon effect".

Kupfeka Mazino: Kurovana kunowanzoitika pakati pemazino emazino nemachain rollers zvinogona kukonzera kupera kwemazino, kurodzwa kwemiromo yemazino, uye kutsemuka kwemidzi yemazino, zvichikonzera kudzikira kwekushanda kwemeshi yemazino.

Kupfeka Mugodhi Nemabheya: Kudengenyeka uye kukanganiswa kwemashaft nemabheya kune mamwe ma radial ne axial loads, zvichikurumidzisa kupera kwezvinhu zvinotenderera zvebheya, mitambo yemukati neyekunze, uye majenari, zvichideredza hupenyu hwebasa rebheya uye zvichitokonzera kukotama kwemugodhi.

(V) Kubudirira Kushoma Kwekutumira Mafaira

Kukanganiswa, kudedera, uye kurasikirwa kwekukweshana kunokonzerwa nemhedzisiro yepolygon kunoderedza kushanda zvakanaka kwekutumira kwemasisitimu ekutumira maroller chain. Kune rumwe rutivi, kushanduka-shanduka kwekukurumidza kunogona kukonzera kushanda kusina kugadzikana kwemuchina wekushanda, zvichida simba rakawanda kuti zvikunde mitoro yakawedzerwa inokonzerwa nekushanduka-shanduka. Kune rumwe rutivi, kuwedzera kwekusakara kunowedzera kuramba kwekukweshana pakati pezvikamu, zvichiwedzera kurasikirwa nesimba. Pakushanda kwenguva refu, kudzikira uku kushanda kunogona kuwedzera zvakanyanya kushandiswa kwesimba remuchina uye kuwedzera mari yekugadzira.

Chechina, Mhinduro yeSainzi: Maitiro Anoshanda Ekuderedza Mhedzisiro yePolygon

Kunyangwe mhedzisiro yepolygon iri hunhu hwemukati me roller chain transmissions uye isingagone kubviswa zvachose, inogona kuderedzwa zvinobudirira kuburikidza nekugadzira kwakakodzera, kusarudza, uye matanho ekugadzirisa, nokudaro zvichivandudza kutsetseka, kururama, uye hupenyu hwebasa re transmission system. Nzira dzakatarwa ndeidzi:

(I) Kugadzirisa Dhizaini yeSprocket uye Sarudzo

Kuwedzera Nhamba yeMazino eSprocket: Kunyangwe zvichizadzisa zvinodiwa zve transmission ratio nenzvimbo yekuisa, kuwedzera zvakakodzera huwandu hwemazino esprocket kunogona kuderedza huwandu hwemativi kusvika pakureba kwe "polygon," zvichideredza kuchinja kwe radius inotendeuka pakarepo uye nokudaro zvichideredza kukura kwekuchinja-chinja kwekukurumidza. Kazhinji, huwandu hwemazino ari pa sprocket inotyaira hahufanirwe kunge hwakanyanya kuderera (kazhinji, mazino asingapfuure gumi nemanomwe anokurudzirwa). Kune ma transmissions anomhanyisa kana maapplication anoda kupfava kwakanyanya, huwandu hwakawanda hwemazino esprocket (semuenzaniso, makumi maviri nemashanu kana kupfuura) hunofanira kusarudzwa. Kuderedza zvikanganiso zve sprocket pitch diameter: Kuvandudza kurongeka kwe sprocket machining uye kuderedza zvikanganiso zvekugadzira uye denderedzwa runout errors mu sprocket pitch diameter kunoita kuti pave neshanduko dzakapfava mu instant rotation radius ye meshing point panguva ye sprocket rotation, kuderedza shock uye vibration.

Kushandisa ma sprockets ane ma profiles emazino akakosha: Pakushandisa kunoda kutumirwa kwakapfava, ma sprockets ane ma profiles emazino akakosha (akadai se arc-shaped sprockets) anogona kushandiswa. Mazino ane ma arc-shaped anoita kuti meshing pakati pecheni ne sprocket ive nyore, zvichideredza meshing shock uye nokudaro zvichideredza simba re polygon effect.

(II) Kusarudza Maparamita Echeni Nemazvo

Kuderedza kukwirira kwecheni: Kudzika kwecheni ndeimwe yematanho akakosha anokanganisa mhedzisiro yepolygon. Kudzika kwecheni kudiki, kureba kwerutivi rwe "polygon" kudiki uye kuchinja kwekukurumidza kwecheni kudiki. Nokudaro, paunenge uchizadzisa zvinodiwa zvekutakura mutoro, cheni dzine mapitch madiki dzinofanira kusarudzwa. Kune mashandisirwo ekutumira nekukurumidza, macheni anotenderera ane mapitch madiki (akadai seISO standards 06B na 08A) anokurudzirwa. Kusarudza cheni dzine mapitch madiki anokurudzirwa: Kuvandudza kunyatsogadzirwa kwecheni, senge kuderedza kutsauka kwecheni, kuyerera kweroller radial, uye kucheneswa kwepini, kunoita kuti cheni ifambe zvakanaka panguva yekushanda uye kunoderedza mhedzisiro yepolygon inowedzerwa nekusakwana kwecheni.

Kushandisa michina yekutsimbirira: Kugadzirisa zvakanaka michina yekutsimbirira cheni (yakadai seye spring tensioners ne weight tensioners) kunoita kuti cheni irambe yakatsimbirira zvakanaka, zvichideredza kutsvedza kwecheni uye kudedera panguva yekushanda, nokudaro zvichideredza kukanganiswa uye kushanduka-shanduka kwekukurumidza kunokonzerwa ne polygon effect.

(III) Kudzora maparamita ekushanda kwesystem yekutumira
Kudzikamisa kumhanya kwekutumira: Kumhanya kwesprocket kwakakwira, ndiko kuwedzera kwekushanduka, kukanganiswa, uye kudedera kunokonzerwa nemhedzisiro yepolygon. Saka, pakugadzira sisitimu yekutumira, kumhanya kwekutumira kunofanirwa kuganhurirwa zvakakodzera zvichienderana nezvinodiwa necheni uye sprocket. Kune cheni dzakajairwa dzeroller, kumhanya kwakanyanya kunobvumidzwa kunowanzo tsanangurwa zvakajeka mubhuku rezvigadzirwa uye kunofanirwa kutevedzwa zvakanyanya.

Kugadzirisa huwandu hwekutumira: Kusarudza huwandu hwekutumira hune mwero uye kudzivirira huwandu hwakawanda (kunyanya mukuderedza kumhanya) kunogona kuderedza kuchinja kwevelocity ye sprocket inofambiswa. Musystem yekutumira ine matanho akawanda, huwandu hwekutumira hwakanyanya hunofanirwa kupihwa kune nhanho yekumhanya yakaderera kuderedza kukanganiswa kwemhedzisiro ye polygon padanho rekumhanya rakakwirira.

(IV) Simbisa Kuisa uye Kugadzirisa Midziyo

Iva nechokwadi chekuti kuiswa kwakarurama: Paunenge uchiisa roller chain transmission system, iva nechokwadi chekuti parallelism error pakati pedriving nedriven sprocket axes, center distance error pakati pema sprockets maviri, uye sprocket end face circular runout error zviri mukati mehuwandu hunobvumidzwa. Kusakwana kwekuisa kwakarurama kunogona kuwedzera kusawirirana kwemutoro uye kusabatana zvakanaka pakati pecheni ne sprocket, zvichiwedzera kuwedzera kwe polygon effect.

Kuzora uye Kugadzirisa Nguva Dzose: Kuzora cheni yeroller ne sprockets nguva dzose kunogona kuderedza kukweshana pakati pezvikamu, kunonoka kupera, kuwedzera hupenyu hwebasa recheni ne sprockets, uye zvakare kuderedza kuvhunduka nekudedera kusvika pamwero wakati. Sarudza mafuta akakodzera (akadai semafuta kana grisi) zvichienderana nenzvimbo yekushanda kwemuchina nemamiriro ezvinhu, uye zora uye ongorora michina panguva dzakatarwa. Tsiva zvikamu zvakasakara nekukurumidza: Kana cheni iine kurebesa kwakanyanya kwepitch (kazhinji ichipfuura 3% yepitch yekutanga), kupera kweroller kwakaoma, kana kupera kwezino kwe sprocket kunopfuura muganho wakatarwa, cheni kana sprocket inofanira kutsiviwa nekukurumidza kudzivirira kupera kwakanyanya kwezvikamu kubva pakuwedzera mhedzisiro ye polygon uye zvinogona kukonzera kutadza kwemuchina.

Chechishanu, Pfupiso
Mhedzisiro yepolygon yemaroller chains ihunhu hwechisikirwo chekutumira kwavo. Inokanganisa zvakanyanya mashandiro uye hupenyu hwesevhisi yesystem yekutumira nekukanganisa kugadzikana kwekumhanya kwekutumira, kugadzira kuvhunduka uye ruzha, uye kukurumidza kupera kwezvikamu. Zvisinei, nekunzwisisa zvakakwana misimboti uye zviratidzo zvakananga zvemhedzisiro yepolygon uye kushandisa nzira dzesainzi uye dzakakodzera dzekuderedza (dzakadai sekugadzirisa sarudzo ye sprocket nechain, kudzora ma parameter ekushanda, uye kusimbisa kuiswa nekugadzirisa), tinogona kuderedza zvinobudirira mhedzisiro yakaipa yemhedzisiro yepolygon uye kushandisa zvizere mabhenefiti ekutumira kweroller chain.