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1、The Design of the Overall and A Type of Door Frame of 60 Tons Gantry Cranespeaker：xxx1alThe Main Contentsuthe basis of the paperuthe research contentsuthe research methodsusummary and outlook2alThe Basis of The Papern1. The Development of CraneuIn recent years, the role of the lifting transportation
2、 machinery is beyond the scope of auxiliary equipment due to the continuous development of industrial technology. And then this machinery has been directly used in the production process. It has been the main parts of the assembly line.3auTendency4an2. The shortage of the domestic cranesuThe perform
3、ance of products and development ability is weak;uThe level of manufacturing technology is low;uThe product detection level is not high; uThe fittings supply is insufficient and the quality is poor; uThe update of product technology standard is lag and is lack of executive force.5alThe Research Cont
4、entsuThe Design of the Overall and A Type of Door Frame of 60 Tons Gantry Crane.uDetermining the overall design, including the door height, the main girders span, gate leg type and basic size, etc.uCalculating the strength of components or structure of the crane , then checking the strength and stab
5、ility.6althe research methodsn1. The design parameters elevating capacity Q=60ttype of door legAlifting altitude H=12mLifting speed v=10m/minrunning speed of little vehicle Vc=45m/minrunning speed of big vehicle v=42m/minClassification grade of the whole machine average A5Classification grade of mec
6、hanismM5 structuresingle boxes and double beamsmaterialSteel structure7an2.The Type of LoadTYPECONTENTSWORKING CONDITIONSMARGIN of SAFETYfatigue, wear and heat loadthe general working conditions1.5static strength, the stability of the local mechanisms stability and stability against overturningthe m
7、ost unfavorable working conditions1.33 the intensity of a certain safety device against the storm blow awaynone working state1.158an3Confirming A Preliminary SchemeuThe door frame: type A legs, single box ,double beams structure. uThe height of main girder is H =15 m, the span is L= 30m.uThe hinge t
8、ype of legs is two rigid legs.9an4. Design the Dimensions uThe determination of main girder geometry size.10auGeometric Features of GirdersAreas: SL = 48976 mm2Moment of inertia: Ix= Iy=Section modulus：Wx=Wy =11auThe determination of cross-section geometry size of door legs.12auGeometric Features of
9、 Door LegsAreas: ST = 60576 mm2Moment of inertia: Ix= Iy=Sction modulus：Wx=Wy =13an4.Caulculate LoadThe types of loadThe value of loadDistributed load of portal frameThe pressure of little vehicles roolsThe inertia force of little vehicle while brakingThe inertia force of big vehicle while braking14
10、auWind LoadsWind loadsThe value of loads On cargosOn little vehicleOn main beamOn legs15an5.Caulculate the Internal Force of GirderThe internal force diagrams of girder16a Type of loadThe position of little cardistributed load of girdermoving load midspan-769137102326cantilever-7691371-2601-1301 Typ
11、e of loadThe position of little carThe inertia force of little vehicle while brakingComposite bending momentmidspan16881-6013778cantilever16881-3202151uThe vertical in-plane bending moment of girder17a loadThe position of little carThe function of midspan-4132cantilever-8552uThe horizontal in-plane
12、bending moment of girder18an6. Checking the Strength of GirderuThe maximum value of bending stress is:(1)While the little vehicle is at the midspan.(2)While at the cantileveSo, the selected size meets the strength demand of girder .19an7.Caulculate the Internal Force of Door Legs.uWhile the little v
13、ehicle is located in the the main girder across.uWhile at the cantilever.20auChecking the Strength of Door Legs.uThe maximum value of the door legs is:(while the little vehicle is located in the main girder across)So, the selected size meets the strength demand of door legs.21alSummary and OutlooknT
14、he design of the main beams and doors leg has been illustrated in detail in this paper. In accordance with limit stress calculation method and allowable stress calculation method , the author has checked the strength of the main beams and doors leg .In the end ,the author has determined the final de
15、cision of the appropriate size in the main beam and doors leg flat plane.22anAnewstageofthe design of the crane uElectronic Computer TechnologyuOptimization of EngineeringuValue EngineeringuReliability EngineeringuCreating EngineeringuMan-machine EngineeringThese new technologies are promoting many interdisciplinary design methods which are more innovative, higher quality and higher efficiency.23a
