As shown in the figure, the DTE response curves without pitting and with pitting are drawn. Due to the periodic change in the process of gear rotation and meshing, as shown in figure (a), the DTE curve change also presents periodic change effect. The partial enlarged curve of DTE in three or four gear meshing cycles is still selected for quantitative analysis of DTE change. The partial enlarged diagram is shown in figure (b).

The change of DTE curve in figure (b) shows that for the DTE curve without pitting, it shows a relatively stable change in both double meshing area and single meshing area, while for the DTE curve with pitting, it shows obvious fluctuation in both meshing areas, especially in single meshing area. In the double meshing zone, the statistical index G3 of DTE is – 65.9 μ m without pitting, and – 70.6 μ m with pitting. The increase percentage of DTE with pitting is 7.1%. At the same time, the statistical index G4 of DTE is about 30 μ M. Similarly, in the single meshing zone, the statistical index G3 of DTE is – 95.4 μ m under non pitting feature and – 155 PM under pitting feature, and the increase percentage of DTE under pitting feature is 62.4%. At the same time, the statistical index G4 of DTE is about 146 μ m, and the statistical index G2 is – 200 μ M. From the DTE increasing effect of double meshing zone and single meshing zone, the pitting action zone has obvious effect on the DTE increasing in single meshing zone.