Correction of Concave and Convex Tooth Surface Patterns of Spiral Bevel Gears Considering Installation Errors
As a key power transmission component in heavy duty gas turbines,the bi-directional operation of the spiral bevel gears places higher quality requirements of the contact patterns on the concave and con-vex surfaces of the gears.In order to meet the practical requirements,a tooth meshing model is developed and the numerical law of contact marks with installation error is investigated using the error tooth contact a-nalysis(ETCA)technique,which takes into account the installation error when both concave and convex surfaces of a pair of spiral bevel gears are working surfaces.Meanwhile,the midpoint position,long axis in-clination and area of the tooth face marks are used as the characteristic values of the marks after parameteri-sation to optimise the gear installation error adjustment values,correct the unreasonable marks and achieve the consistency and overlap of the concave and convex marks.The accuracy of the simulated marks is veri-fied by the rolling test,and the correction law can provide a theoretical basis for the installation adjustment of spiral bevel gear pairs.
spiral bevel gearinstallation errorspatterns on concave and convex tooth surfacesETCA
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NSTL
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