Pneumatic actuator ndi cholumikizira chomwe chimagwiritsa ntchito kuthamanga kwa mpweya kuyendetsa kutsegula, kutseka kapena kuwongolera kwa valve. Imatchedwanso pneumatic actuator kapena pneumatic device. Ma actuators a pneumatic nthawi zina amakhala ndi zida zina zothandizira. Zomwe zimagwiritsidwa ntchito nthawi zambiri ndi ma valve poyika ma valve ndi makina am'manja. Ntchito ya valve positioner ndikugwiritsa ntchito mfundo zoyankha kuti ziwongolere magwiridwe antchito a actuator kuti actuator ikwaniritse malo olondola molingana ndi chizindikiro chowongolera cha wowongolera. Ntchito ya makina a handwheel ndikuigwiritsa ntchito kuti igwiritse ntchito mwachindunji valavu yolamulira kuti ikhale yopangidwa bwino pamene kayendetsedwe ka kayendetsedwe kake kakalephera chifukwa cha kutha kwa magetsi, kutuluka kwa mpweya, palibe kutuluka kwa wolamulira kapena kulephera kwa actuator.
Mfundo Yogwira Ntchito ya Pneumatic Actuator
Mpweya woponderezedwa ukalowa mu choyendetsa pneumatic kuchokera ku nozzle A, mpweya umakankhira ma pistoni awiri kuti asunthire molunjika kumbali zonse ziwiri (malekezero a mutu wa cylinder), ndipo choyikapo pa pistoni chimayendetsa giya pa shaft yozungulira kuti izungulire madigiri 90 molunjika, ndipo valavu imatsegulidwa. Panthawi imeneyi, mpweya pa malekezero onse a actuator pneumatic amatulutsidwa ku nozzle B. M'malo mwake, pamene wothinikizidwa mpweya amalowa malekezero awiri a actuator pneumatic kuchokera B nozzle, mpweya amakankhira pisitoni wapawiri kusuntha linearly pakati, ndi pachivundikiro pa pisitoni amayendetsa giya pa mozungulira shaft, 0 kutsekedwa valavu ndi kuzungulira. Panthawi imeneyi, mpweya wapakati pa pneumatic actuator umachokera ku Nozzle A. Zomwe zili pamwambazi ndizofalitsa zamtundu wokhazikika. Malingana ndi zosowa za ogwiritsa ntchito, makina oyendetsa pneumatic akhoza kuikidwa ndi mfundo yopatsirana yosiyana ndi mtundu wokhazikika, ndiko kuti, chingwe chosankhidwa chimazungulira mozungulira kuti chitsegule valve, ndikuzungulira mozungulira kuti chitseke valavu. Nozzle A ya single-acting (mtundu wobwerera kasupe) pneumatic actuator ndi mpweya wolowera, ndipo bubu la B ndilobowo lotulutsa mpweya (bulu la B liyenera kuyikidwa ndi chopopera). Cholowera cha A nozzle chimatsegula valavu, ndipo mphamvu yamasika imatseka valavu pamene mpweya wadulidwa.
Kuchita kwa Pneumatic Actuator
1. Mphamvu yotulutsa mphamvu kapena torque ya chipangizo cha pneumatic iyenera kutsatira malamulo apadziko lonse ndi makasitomala
2. Popanda kunyamula katundu, silinda imalowetsedwa ndi kuthamanga kwa mpweya komwe kumatchulidwa mu "Table 2", ndipo kuyenda kwake kuyenera kukhala kosalala popanda kugwedeza kapena kukwawa.
3. Pansi pa mphamvu ya mpweya wa 0.6MPa, phokoso lotulutsa mpweya kapena kuponyedwa kwa chipangizo cha pneumatic m'njira zonse zotsegulira ndi zotsekera sizidzakhala zochepa kuposa mtengo womwe wasonyezedwa pa nameplate ya chipangizo cha pneumatic, ndipo chochitacho chidzakhala chosinthika, ndipo palibe kusinthika kosatha kapena zochitika zina zosazolowereka zomwe zidzachitike mbali iliyonse.
4. Pamene mayeso osindikizira akuchitika ndi mphamvu yaikulu yogwira ntchito, kuchuluka kwa mpweya wotuluka kuchokera kumbali iliyonse ya kumbuyo sikudutsa (3 + 0.15D) cm3 / min (boma lokhazikika); kuchuluka kwa mpweya wotuluka kuchokera pachivundikiro chomaliza ndi shaft yotulutsa sichiyenera kupitilira (3+0.15d)cm3/min.
5. Mayeso amphamvu amachitika ndi 1.5 nthawi yochuluka yogwira ntchito. Pambuyo posunga kukakamiza kwa mayeso kwa mphindi zitatu, chivundikiro chomaliza cha silinda ndi magawo osindikiza osasunthika saloledwa kukhala ndi kutayikira komanso kupunduka kwamapangidwe.
6. Chiwerengero cha moyo wochitapo kanthu, chipangizo cha pneumatic chimatsanzira zochita za valve ya pneumatic. Pansi pakukhalabe ndi torque yotulutsa kapena kuthamangitsa mbali zonse ziwiri, kuchuluka kwa ntchito zotsegula ndi kutseka sikuyenera kuchepera nthawi 50,000 (kutsegula kumodzi kotseka).
7. Pazida za pneumatic zokhala ndi ma buffer, pisitoni ikasunthira kumapeto kwa sitiroko, kukhudzidwa sikuloledwa.
Ubwino wa Pneumatic Actuators
1. Landirani zizindikiro za gasi mosalekeza ndi kutuluka kwa mzere wa mzere (pambuyo powonjezera chipangizo chosinthira magetsi / gasi, chingathenso kuvomereza zizindikiro zamagetsi mosalekeza). Ena amatha kutulutsa kusuntha kwamakona atayikidwa ndi mkono wa rocker.
2. Pali ntchito zabwino ndi zoipa.
3. Liwiro losuntha ndilokwera, koma liwiro lidzachepa pamene katundu akuwonjezeka.
4. Mphamvu yotulutsa ikugwirizana ndi kuthamanga kwa ntchito.
5. Kudalirika kwakukulu, koma valavu silingathe kusungidwa pambuyo poti gwero la mpweya likusokonezedwa (likhoza kusungidwa mutatha kuwonjezera valve yosunga malo).
6. Ndizovuta kuzindikira kuwongolera kwa magawo ndi kuwongolera pulogalamu.
7. Kukonza kosavuta ndi kusinthika kwabwino kwa chilengedwe.
8. Mphamvu zazikulu zotulutsa.
9. Imakhala ndi ntchito yoletsa kuphulika.
Mu Chilimwe
Kuyika ndi kulumikiza miyeso ya ma pneumatic actuators ndi mavavu amapangidwa molingana ndi miyezo yapadziko lonse lapansi ISO5211, DIN3337 ndi VDI/VDE3845, ndipo amatha kusinthana ndi ma actuators wamba a pneumatic.
Bowo la mpweya limagwirizana ndi muyezo wa NAMUR.
Bowo la pansi la shaft la choyatsira pneumatic (mogwirizana ndi muyezo wa ISO5211) ndi lalikulu pawiri, lomwe ndi losavuta kukhazikitsa ma valve okhala ndi mizere kapena 45 ° yokhala ndi ndodo zazikulu.
Nthawi yotumiza: Feb-16-2025