Proceedings of SerbiaTrib '13

Especially when the chain transfer torquetransmissionn is based on the basis of friction. Therequirementfor the proper operation of structures,in the presence of synchronization, is that themotors are with the same characteristics. One off theproblems of providing synchronized movement isthe possible differencee of phasess of propulsionmotors. In addition, great equalization currents canoccur that can cause permanent deformation off themotor coils. In addition to these phenomenacanoccur torque on the wheel axle, which can causeeven shaft breakage. Ifthere is a significant phaseshift of motors, engines must be harmonized, whichmeans, must be speedup or slow down. Theproblem ofnot synchronized movement has aparticularly negative impact on thefrictional wearof the drive wheels.Figure 2. Conceptual design off constructionConceptual principally solution system Apogondrum marine winch, during the drafting process isshown in Figure 2. General function of rotationalstructure is achieved (Figure 2) executing a seriesof partial functions. Rotary positioner is composedof more machine parts,sub-assemblies, subgroupsand groups linked to a functional unit. A flexibleshaft coupling is interconnected with the shaft andwheels so the torque and power from the engine istransmitted from one shaft to another point. Drivenwheels rotating function performed under theinfluence of rotationof the drum. Framesconstruction, rely on a base that is used to keeping adistance between frames is realized, dependingg onthe needs ofthe fastener.3. ANALYSISOFTRANSMISIONFORCESONDimensioning of steel structures is performedbased on knowledge of layout external actions(forces andmoments). Determining the abilityy ofconstructionn to convey given loads of force is basedon the characteristics ofthe materials used andd theallowable stress. Allowable stressess are prescribedfor the steelstructure and functionss are determinedby the choice of the material and the t character of13 th International Conference on Tribology – Serbiatrib’13the external load. Calculation of the construction isproof load and usability off the structure under theinfluence of prescribed loadd during thelife time ofconstruction. The process of designing, calculatinganddimensioning of construction is actually choiceof a calculationn model to credibly describe the realbehavior of thee structure under the prescribed load,buttaking into account thee optimal complexity ofthe model, the t possibility to calculate theperformance and profitability of individual parts ofthe structure. This work studied the loads that occurin the system. . System shown in Figure 3 wasexaminated as static s system, i.e. systemat rest stateandthe conditions that enable this state are used.External cause (external effects) on thesolid bodyis the force thatt causes a change in sleep mode andthe motion of the system. For the analysis of theeffects of forcess in the specific examplee of the drumwith diameter D = 1000 mm and length l = 20000mmm load is thee weight of the drum, which is G =50000 N. Based on these data dimensions ofconstruction were w developed. It is necessary todetermine the load l distribution, especially load offriction wheel as a function of drum position(Figure 3). Rotary positioner is designed that atwork most of the weight rests on the drum drivewheel. The whole system iss viewed as a horizontalsystem which is attached to the substrate. In thiscase, the main task is reduced to the determinationnof the resistance of the supports and the force offriction.Figure 3. Schedule forces onn the maximumm size of thedrummIn the beginning problem is solved imagininggthat the supports are removed and replaced by theiraction forces called c resistance actions, as in thiscase the normall force wheels and . It analyzesthe effect of thee friction forces that appear betweenthe drum andd wheel. How there are differentmaterials in the contact zone, i.e. theinteractionnbetween the rubber and steel, the coefficients offriction μ is different. Connected with this, for the3433