| The longevity of gears in one reducer is quite different, so through caculating the strength of standard reducers the gears'strength difference of the standard reducers about ZY serial was calculated and analyzed in this paper, and the method of equal strength optimal design is added for improvement.The strength datas of ZLY serial reducers,which were computed by the programme edited here, show that strength difference generally exists in this kind of standard reducers and the strength difference for bending, which is more important in metallurgy area, is comparatively worse.Safety factors, which are of one criterion for the strength, was adapted as the parameter for equal strength, and through relizing equal strength, longevity state is improved. The objective for equal strength here was that both of the variances of gears'safety factors both for pitting and bending strength came to the least. By developing the software, the gear box will be designed, the difference of gears'strength will be decressed, the capability of reducer will be improved, and the company will realize innovation.The software developed here can basicly accomplish the following main functions. gears'strength-Calculation, based on GB/T 3480-1997"Calculation Methods of Load Capacity for Involute Spur and Helical Gears", supplies the list of the strength calculate process, and saves the data file. Design the gears, based on the equal strength optimal methods, three optimal methods such as Complex,combining CRDM and Random Test,PHRM were selected and made some amends according to nonlinear mixed-discrete variable optimal technoledge, final optimal results not only the continious variable but also the mixed-discrete variable are achieved, through the continious variable results the validity of mixed variable results will be judged, and stability and reliability of the software is improved through using several optimal methods . |
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