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1、.NationalStandardofthePeople’sRepublicofChinaGB13552-92AutomotiveV-ribbedbelts1.ThemeandapplicationscopeThisstandardspecifiestheclassification,technicalrequirements,testmethods,inspectionrules,marking,packing,transportandstorageofautomotiveV-ribbedbelts(hereinaftershortenedasbelts).Thi
2、sstandardisapplicabletoV-ribbedbeltsthatareusedtotransfertheforceofautomotivegasenginetosomeaccessorymachineslikecookingfan,dynamotor,waterpump,compressor,powersteeringpumpandetc.2．Productclassification2.1MarkingBeltsareclassifiedaccordingtocrosssections.ThisstandardonlycontainsPKtype,
3、andwedgenumberis3orabove.Themarkingcontentsofbeltsarewedgenumber,typeandbeltlengthinorder.wedgenumbertypeBeltlength2．2StructureEndlessbeltwiththecrosssectionshowninfigure1Figure1-nameofeachpartinthestructure,1-cover;2-core;3-adhesiveglue;4-wedgeglueApprovedbyChinaStateBureauofTechnical
4、Supervisionon06-29-1992Implementedon06-01-1993GB13552-922.3MaterialsAdhesiveglueandwedgeglueismadebycorrespondingmethod.Thecoverusesninonmadeofcottonfiberorsyntheticfiber,whoselongitudeandwoofshallbeequalwithoutanyspotsordeformation.2.4Dimension2.4.1DimensionofsectionsSeetable1andfigur
5、e2fordimensionofsectionsTable1sectiondimensionofbeltsnamesymboldimensionwedgeanglea(°)40pitchp35.6beltwidthb35.6×nbeltheightH6（referencenumber）wedgeheightC3（referencenumber）radiusofwedgebottomr0．25≤note:nrepresentswedgenumberFigure2-beltsection2.4.2EffectivelengthofbeltsEffectivelength
6、ofbeltsshallbemeasuredaccordingtoclause4.1.Itslimitdeviationisshownastable2.Table2-limitdeviationofbeltlengthbetlengthlimitdeviation≤10000±5.0＞10000~1200±6.0＞1200~1500±8.0＞1500~2000±10.0＞2000±12.03Technicalrequirements3.1DimensionSectiondimensionandeffectivelengthofbeltsandlimitdeviati
7、onofthelengthGB13552-92shallfollowthespecificationsinfigure2,table1andtable2correspondingly.3.2AppearancequalityTheappearanceofbeltsshallhavenoobjections,e.g.distortion,deformation,clot,faults,pinprick,eyewinkerandetc.3.3FatiguelifeThefatiguelifeofbeltsismeasuredaccordingtoclause4.3a
