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1、Themachinepistonconnectingrodset-detailedexpositionofpistonThepistonconnectingrodsetiscomposedofthepiston,pistonwreath,pistonpin,connectingrod,connectingrodaxlebush,etc.Ⅰ.effect:Theeffectofthepistonistobeartheairpressure,andpasstoconnectingrodtodrivethebentaxletorevolvethroughc
2、onnectingrodaxlebush,thepistoncopingisstillapartoftheburningroom.Theworkcondition:Pistonworksundertheconditionofheat,highpressure,highspeed,andbadlubrication.Pistondirectlycontactswiththeheatair.Thetemperaturecanamounttoabove2500Ksinamoment.Thepistonisheatedseverely,butthecondi
3、tionofspreadingthehotisbad.Sowhilethepistonworks,thetemperatureisveryhighandthecopingisuptothe600-700Ks:Andthetemperaturedistributesasymmetrically;Thepistoncopingbearsgreatairpressure,especiallythepressureisgreatestintherouteofdoingefficacy.Thegasolinemachineisuptothe3-5MPas,th
4、edieselengineisuptothe6-9MPas.Thismakesthepistonproducepound,1andbearthefunctionofthesidepressure.Therefore,thepistonshouldhaveenoughheat-proof,trytodecreasetheheatingarea,,strengthenthecoolingofthepiston,tomakethehighesttemperatureofthecopingdescend.Thepistonmovesatveryhighspe
5、ed(8-12ms/s)backandforthintheaircylinder,andspeedchangesconstantly,Thisproducesverygreatinertialdint,makingthepistonbeargreatadditionalloadworkingundersuchbadcondition,thepistonwillbecomedeformedheatingpower.Atthesametime,itslittersthechemicalcorrosivepoweroftheburninggas.Inord
6、ertodescendtheinertialdintofbackandforth,wemusteasetheweightofthepistonaspossible.Pistonworksundertheconditionoftheheat,highpressure,highspeed(theaveragespeedcanamounttothe101115m/s),anditslubricantconditionisbadandthefricationbetweenthepistonandtheaircylinderwallisverygreat.In
7、ordertodescendthefriction,thesurfaceofthepistonsurfacemustbewear-resistant..Request:(1)Tohaveenoughrigidityandstrength,andthereliabledint;(2)Transmitheatwell,bearthehighpressure,beartheheatand1beartowearaway;(1)thequantityissmall,theweightislight,descendtheinertialdintofbackand
8、forthaspossibleThealuminummetalalloymaterialsatisfiest
