Direct drive vs. geared rotary servomotor: A quantification yemukana wedhizaini: Chikamu 1

Zvinangwa Zvekudzidza

• Real-world rotary servo masisitimu anowira pasi pekuita kwakaringana nekuda kwekugumira kwehunyanzvi.
• Mhando dzinoverengeka dze rotary servomotors dzinogona kupa mabhenefiti kune vashandisi, asi imwe neimwe ine chaiyo dambudziko kana muganhu.
• Direct drive rotary servomotors inopa kuita kwakanyanya, asi inodhura kupfuura gearmotor.

Kwemakumi emakore, geared servomotors yanga iri imwe yezvishandiso zvakajairika muindasitiri otomatiki bhokisi rekushandisa. Geared sevromotors inopa chinzvimbo, velocity matching, electronic camming, winding, tensioning, tightening applications uye zvinonyatsoenderana simba re servomotor kumutoro. Izvi zvinomutsa mubvunzo: igeared servomotor ndiyo yakanakisa sarudzo yeinotenderera inofamba tekinoroji, kana pane mhinduro iri nani?

Munyika yakakwana, inotenderera servo system yaizove ne torque uye yekumhanyisa ratings inoenderana nechishandiso kuitira kuti mota isanyanya kukura kana kuderera-saizi. Iko kusanganiswa kwemota, zvinhu zvekufambisa, uye mutoro unofanirwa kuve nekusingaperi torsional kuomarara uye zero backlash. Nehurombo, nyika chaiyo inotenderera servo masisitimu inodonha pane iyi yakanaka kune akasiyana madhigirii.

Mune yakajairwa servo system, backlash inotsanangurwa sekurasikirwa kwekufamba pakati pemota uye mutoro unokonzerwa nemagetsi kushivirira kwezvinhu zvekutumira; izvi zvinosanganisira chero kurasikirwa kwekufamba mukati megiya mabhokisi, mabhandi, cheni, uye couplings. Kana muchina uchinge waiswa simba, mutoro unoyangarara pane imwe nzvimbo pakati pemagetsi kushivirira (Mufananidzo 1A).

Pamberi pemutoro pachawo unogona kufambiswa nemota, mota inofanirwa kutenderera kuti itore zvese zvinyoro zviripo muzvinhu zvekufambisa (Mufananidzo 1B). Kana mota ikatanga kudzikira pakupera kwekufamba, iyo nzvimbo yekuremedza inogona kunyatso pfuura iyo mota chinzvimbo sezvo simba rinotakura mutoro kupfuura mota.

Iyo mota inofanira zvakare kusimudza slack kune yakatarisana isati yaisa torque kumutoro kuti udzikise (Mufananidzo 1C). Uku kurasikirwa kwekufamba kunonzi backlash, uye kunowanzo kuyerwa muarc-maminitsi, akaenzana ne1/60th yedhigirii. Magearbox akagadzirirwa kushandiswa nema servos mumaindasitiri maapplication anowanzo ane backlash yakatarwa kubva pa3 kusvika 9 arc-maminetsi.

Torsional kuomarara ndiko kuramba kumonyoroka kwemota shaft, kutapurirana zvinhu, uye mutoro mukupindura kushandiswa kwetorque. Iyo isina magumo sisitimu yakaoma yaizoendesa torque kumutoro isina konana kutsauka pamusoro peakisi yekutenderera; zvisinei, kunyange simbi yakasimba shaft ichamonyoroka zvishoma pasi pemutoro unorema. Hukuru hwekutsauka hunosiyana ne torque yakaiswa, zvinhu zvekutumira zvinhu, uye chimiro chavo; intuitively, refu, zvidimbu zvitete zvichamonyoroka kupfuura zvipfupi, zvakakora. Kuramba kumonyorora uku ndiko kunoita kuti zvitubu zvekoiri zvishande, sekumanikidza chitubu kumonyorora kutenderera kwewaya zvishoma; Fatter wire inoita chitubu chakasimba. Chero chipi zvacho chisingasviki kusingaperi torsional kuomarara kunoita kuti sisitimu iite sechitubu, zvichireva kuti simba rinogona kuchengetwa muhurongwa sezvo mutoro unoramba kutenderera.

Kana yakasanganiswa pamwechete, kuomarara kwekuomarara uye kumashure kunogona kukanganisa zvakanyanya kuita kwe servo system. Backlash inogona kuunza kusavimbika, sezvo mota encoder ichiratidza pakamira shaft yemota, kwete uko kuseri kwakabvumira kuti mutoro ugadzikane. Backlash zvakare inosuma nyaya dzekugadzirisa semutoro vakaroora uye vasina kuroora kubva kumota muchidimbu apo mutoro uye mota zvinodzoreredza hama. Pamusoro pekudzokera kumashure, kuomarara kwekupedzisira kunochengetedza simba nekushandura rimwe rekinetic simba remota uye kurodha kuita simba ringaite, richiriburitsa gare gare. Uku kunonoka kuburitswa kwesimba kunokonzeresa kutenderera kwemutoro, kunokonzeresa resonance, kunoderedza huwandu hunogona kushandiswa tuning kuwana uye kunokanganisa kuterera uye kugadzirisa nguva ye servo system. Muzviitiko zvese, kudzikisira kumashure uye kuwedzera kuomarara kwehurongwa kuchawedzera servo kuita uye kurerutsa tuning.

Rotary axis servomotor zvigadziriso

Iyo yakajairika inotenderera axis kumisikidzwa ndeye inotenderera servomotor ine yakavakirwa-mukati encoder yekupindura chinzvimbo uye giya bhokisi kuti rifananidze iripo torque uye kumhanya kwemota kune inodiwa torque uye kumhanya kwemutoro. Iyo giya bhokisi inogara iine simba mudziyo inova mechaniki analog yetransformer yekufananidza mutoro.

Iyo yakagadziridzwa dhizaini dhizaini inoshandisa yakananga dhiraivha inotenderera servomotor, iyo inobvisa zvinhu zvekufambisa nekubatanidza zvakananga mutoro kune mota. Ipo iyo gearmotor kumisikidzwa inoshandisa coupling kune idiki dhayamita shaft, iyo yakananga dhiraivha system inovhara mutoro wakananga kune yakakura kwazvo rotor flange. Iyi gadziriso inobvisa backlash uye inowedzera zvakanyanya torsional kuomarara. Iyo yakakwira danda kuverenga uye yakakwira torque mhepo yeakananga dhiraivha motors inoenderana neiyo torque uye kumhanya maitiro egiyamotor ine chiyero che10: 1 kana kupfuura.