Estimation of vibration of power transmission helical gears by means of performance diagrams on vibration.

For the purpose of clarifying tooth errors on the vibration behavior of power transmission helical gear pairs with comparatively narrow facewidth, the nondimensional equation of rotational motion has been numerically solved by taking several kinds of errors into account. Furthermore, the performance diagrams on vibration have been introduced, in which the acceleration level is shown by contour lines on the contact ratio domain which is formed by the transverse contact ratio (abscissa) and the overlap ratio (ordinate). It has been clarified that the influence of errors on vibration depends upon the kind of error as well as the rotational speed and the combination of transverse and overlap contact ratios.