| The researchs that are supported by National Natural Science Foundation of China aboutthe double cranks ring-plate-type pin-cycloidal gear planetary drvie with three gears weredone, this kind of new drive was proposed by analyzing and comparing the characteristics ofclassical pin-cycloid planetary drive and three rings involute gear reducer, which obtain theadvantages and overcome the disadvantages of the above two kinds of tranmission, so it is akind of developing industry product. The project has got large research achievements, whichinclude four prototypes and tests of propotypes in laborary, all that works proviod richtheoretical support for product. The researchs about series design and dynamics simulationand analysis of virtual prototypes and test of prototypes in laborary are done in this paper onthe base of researches have been made.1. Under the guidance of the digital design theory, the software system of parametersdesign and force analysis were derived and written referring to the design method of classicalpin cycloid planetray drive combining the structure characteristics of ring plate type pincycloidal planetary drive, which include the basic parameters design method of involute gearsand cycloidal gears. So the series designs of products were done and the opimaztion designsthat guarantee the main strength indexs and life requirements of bearings are done also.2. For the purpose of completing the virtual analysis of prototypes, the modeling ofaccurate3D models of key parts is necessary, so analyzing the forming principle andstructural characteristics and modeling method of cycloidal gears and involute gears is one ofthe main jobs of this thesis. In order to getting reasonable number of working teeth thatmeshing at the same time and high transmission efficience during work process of cycloidalgear, the equidistance and displacement modifications are adopted in manufacturing processof cycloidal gears, so the parametrical models of real cycloidal gears are built in Pro/Esoftware. At the same time the accurancy models of modified helical involute gears are builtalso, the simulations of virtual models that have gear clearances can be achieved. Finally, fourkinds of prototypes are built, and the base of virtual prototype simulation and FEM analysis isbuilt.3. The new prototype test in laboratory is a kind of good method of getting theperformance index of prototype, but the dynamic characteristics of inner parts of prototypesare hard to getting by laboratory test condition, and the purposes of test are limited, and largecost of time and energy during test is not beneficial for stereotypes and seriation design. Toovercome the above shortcomings, the dynamic virtual simulation of virtual prototypes usingsoftware is a good choice. After achieving the assembly3D models of prototypes, inputtingthe models into ADAMS software and defining the dynamic settgings, the dynamic simulations of serious working conditions are done. The simulation resultes not only includethe kinematics and dynamics results, but can attain the spectral characteristics of key parts ofprototypes by data processing. Such as extracting the simulation data of velocity andacceleration of centroid of main parts and attaining the spectral diagrams by fast Fouriertransform, which as the work base of improving the dynamic performance of products by hardworks.4. The purpose of principle research is to provide better products for society requirement.After completing the systematic theory calculations about the design methods of reduce, thelaboratory test of real prototype is done combined with the finite element analysis of parts ofreduce and dynamic simulation of virtual prototypes. By compared the test data of realprototype with the simulation results of reduce, such as vibration and noise test results, themain frequency ranges that affect the dynamics performance of reduce are confirmed. On thebase of above works, defined the dynamics model and redesign and simulations of virtualpropotype is done. |
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