| Spiral bevel gear and hypoid gear（shorted helical bevel gear）are suitable formotion and power transmission of two intersecting or staggered shafts. Thecontact area pattern of spiral bevel gear is largely determined by its tooth surfacegeometric shape，which directly affects the mechanism transmission quality andworking performance. With the development of modern technology，it has higher andhigher demand for the service life and noise control of spiral bevel gear. But thesystematical experience of spiral bevel gear products with high-quality transmissionperformance have not yet been accumulated or complete designed by many domesticbevel gear manufacturing enterprises. To dig and absorb the advanced technicalperformance of foreign high-quality spiral bevel gear transmission，the problem ofreverse technology and dynamic performance analysis of unknown parameters spiralbevel gear need to be worked out in this paper. It exists many researches related to thevibration and noise and tooth surface reverse technology of spiral bevel gear, somevaluable researches and direct guidance documents about the effects of tooth surfacecontact area pattern on its dynamic performance are less. So, solving the technicalbottlenecks of spiral bevel gear tooth surface reverse and realization technology, thedynamic performance analysis became an important measure of in-deep digging andabsorbing the advanced technology of foreign high-quality gear samples andnarrowing the gap with foreign spiral bevel gear manufacturing level. On that basis,the main research route and contents of this paper:1. Study on the unknown parameters of the spiral bevel gear tooth shapemeasurement and tooth shape deviation measuring and calculating method;The parameters of spiral bevel gear blank is measured using three coordinatemeasuring machine, which is based on the understanding of gear measuringcenter principle and tooth measuring method. The calculating method of unknownparameters spiral bevel gear is researched in3906gear measuring center，toothsurface reverse program based on the basic machine model is written using Matlab,and the reverse experiments on foreign spiral bevel gear with high-qualitytransmission performance are finished.2.Study on the construction method and related technology of spiral bevelgear geometry model and finite element mesh model; The tooth surface is restructured based on discrete data points, and get the3Dgeometry model. Choose hexahedral linear reduced integration unit (C3D8R) forspiral bevel gear meshing by using Hypermesh software, output variable set skill andkey technologies of building finite element model of spiral bevel gear are given,which is fully prepared for spiral bevel gear internal (time-varying meshing stiffnessincentive, meshing impact incentive, meshing transmission error incentive) anddynamic strength calculation.3. Research on the calculation methods of gear internal incentive and dynamicstrength of spiral bevel gear;The calculation methods of gear internal incentive and dynamic strength arestudied using finite element software in this article based on spiral bevel gear loadedcontact finite element analysis principle. Then, the pre-processing methods and keytechnologies of spiral bevel gear internal incentive and dynamic strength are given;internal incentive and dynamic strength of target gear are calculated in the end. Itprovides an effective means for the further analysis of the spiral bevel gearcontact area pattern on the transmission performance.4. Study on the influence of different contact area pattern on spiral bevel geartransmission performance.Internal incentive and dynamic strength of gears with different contact areapattern are calculated systematically using finite element software in this article，theinfluences of gear different contact area pattern on its dynamic performance areexplored though its calculation results. The tooth surface pattern characteristics ofspiral bevel gear with high-quality transmission performance are summarized, finiteelement model of optimized gear with five tooth based on these characteristics is built.Then, dynamic meshing performance of optimized gear is counted, through therelevant calculation results of the optimized gear and sample gears, the tooth surfacepattern characteristics of spiral bevel gear with high-quality transmission performanceare summarized. Finally, the correctness and feasibility of theory study are exploredusing rolling inspection machine of spiral bevel gear in this paper. |
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